Matís Staff

Starfsfólk Matís

Guðmundur Óli Hreggviðsson

Stefnumótandi sérfræðingur

Svið: Stefnumótunar- og tengslaráð

Sími: +354 4225047 / 8585047

Netfang: gudmundo@matis.is

Ritrýndar greinar:

  • Morten Schiøtt, Madeleine Jönsson, Leila Allahgholi, Eva Nordberg Karlsson, Lene Lange, Guðmundur O. Hreggviðsson, Anne S. Meyer. Biorefining of Brown Seaweeds Catalyzed through Innovative Enzyme Processes - (2024). Industrial Biotechnology, Vol. 20, No. 3, . https://doi.org/10.1089/ind.2024.001

  • Daniel Martin Salas-Veizaga, Leonardo Roberto Rocabado-Villegas, Javier A. Linares-Pastén, Elísabet Eik Guðmundsdóttir, Guðmundur Óli Hreggviðsson, María Teresa Álvarez-Aliaga, Patrick Adlercreutz, Eva Nordberg Karlsson . A novel glycoside hydrolase 43-like enzyme from Clostridium boliviensis is an endo-xylanase and a candidate for xylooligosaccharide production from different xylan substrates - (2024). Applied and Environmental Microbiology, Vol. 90, Nr. 4, . https://doi.org/10.1128/aem.02223-23

  • Leila Allahgholi, Maik G N Derks, Justyna M Dobruchowska, Andrius Jasilionis, Antoine Moenaert, Léonie Jouy, Kazi Zubaida Gulshan Ara, Javier A Linares-Pastén, Ólafur H Friðjónsson, Guðmundur Óli Hreggviðsson, Eva Nordberg Karlsson, Leila Allahgholi, Maik G N Derks, Justyna M Dobruchowska, Andrius Jasilionis, Antoine Moenaert, Léonie Jouy, Kazi Zubaida Gulshan Ara, Javier A Linares-Pastén, Ólafur H Friðjónsson, Guðmundur Óli Hreggviðsson, Eva Nordberg Karlsson. Exploring a novel β-1,3-glucanosyltransglycosylase, MlGH17B, from a marine Muricauda lutaonensis strain for modification of laminari-oligosaccharides - (2024). Glycobiology, Vol. 34, Issue 4, . https://doi.org/10.1093/glycob/cwae007

  • Allahgholi, L.; Jönsson, M.; Christensen, M.D.; Jasilionis, A.; Nouri, M.; Lavasani, S.; Linares-Pastén, J.A.; Hreggviðsson, G.Ó.; Karlsson, E.N. . Fermentation of the Brown Seaweed Alaria esculenta by a Lactic Acid Bacteria Consortium Able to Utilize Mannitol and Laminari-Oligosaccharides - (2023). Fermentation, 9, 499, . https://doi.org/10.3390/fermentation9060499

  • A. Schultze-Jena, R.C. Vroon, A.K.A. Macleod, G.Ó. Hreggviðsson, B.T. Adalsteinsson, N.P.E. Engelen-Smit, T. de Vrije, M.A.W. Budde, H. van der Wal, A.M. López-Contreras, M.A. Boon. Production of acetone, butanol, and ethanol by fermentation of Saccharina latissima: Cultivation, enzymatic hydrolysis, inhibitor removal, and fermentation - (2022). Algal Research, Volume 62, . 10.1016/j.algal.2021.102618

  • Josefin Ahlqvist, Javier A. Linares-Pastén, Andrius Jasilionis, Martin Welin, Maria Håkansson, L. Anders Svensson, Lei Wang, Hildegard Watzlawick, Arnþór Ævarsson, Ólafur H. Friðjónsson, Guðmundur Ó. Hreggviðsson, Bernd Ketelsen Striberny, Eirin Glomsaker, Olav Lanes, Salam Al-Karadaghi and Eva Nordberg Karlsson. Crystal structure of DNA polymerase I from Thermus phage G20c - (2022). Acta Crystallogr D Struct Biol, Nov 1; 78(Pt 11), 1384–1398. 10.1107/S2059798322009895

  • Manuela M. Pereira, Patricia N. Refojo, Gudmundur O. Hreggvidsson, Sigridur Hjorleifsdottir and Miguel Teixeira. The alternative complex III from Rhodothermus marinus – a prototype of a new family of quinol: electron acceptor oxidoreductases - (2007). FEBS Letters, 581(25), 4831-4835.

  • Carla Jorge, Maria Sampaio, Gudmundur Hreggvidsson, Jakob Kristjánsson. A highly thermostable trehalase from the thermophilic bacterium Rhodothermus marinus - (2007). Extremophiles, 11, 116-122.

  • Verissimo, A., Pereira, M., Melo, A., Hreggvidsson, GO., Kristjansson, JK., Teixeira, M.. A ba3 oxygen reductase from the thermohalophilic bacterium Rhodothermus marinus - (2007). FEMS Microbiology Letters, 269, 41-47.

  • Hákon Birgisson, Jon Oskar Wheat, Gudmundur O Hreggvidsson, Jakob K Kristjansson, Bo Mattiasson. Immobilization of a recombinant Escherichia coli producing a thermostable alpha-L-rhamnosidase; creation of a bioreactor for hydrolyses of naringen - (2007). Enzyme and Microbial Technology, 40, 1181-1187.

  • Meike Stelter, Ana M. P. Melo, Manuela M. Pereira, Cláudio M. Gomes, Gudmundur O. Hreggvidsson, Sigridur Hjorleifsdottir, Lígia M. Saraiva, Miguel Teixeira, and Margarida Archer. A novel type of monoheme cytochrome c: Biochemical and structural characterization at 1.23 Å resolution of Rhodothermus marinus cytochrome c. - (2008). Biochemistry, 47, 11953-11963.

  • Sigurlaug Skírnisdóttir,Christophe Pampoulie, Sigurbjörg Hauksdóttir, Inga Schulte, Kristinn Ólafsson, Guðmundur Ó. Hreggviðsson, Sigríður Hjörleifsdóttir. Characterization of 18 new microsatellite loci in Atlantic cod (Gadus morhua L.) - (2008). Molecular Ecology Resources, 8, 1503-1505.

  • Labes A, Karlsson EN, Ólafur H. Friðjónsson, Turner P, Guðmundur Óli Hreggvidsson, Kristjansson JK, Holst O, Schönheit P.. Novel members of glycoside hydrolase family 13 derived from environmental DNA - (2008). Applied and Environmental Microbiology, 74(6), 1914-1921.

  • Eva Nordberg Karlsson, Antje Labes, Pernilla Turner, Ólafur H. Friðjónsson, Christina Wennerberg, Tania Pozzo, Gudmundur O. Hreggvidson, Jakob K. Kristjánsson, Peter Schönheit. Differences and similarities in enzymes from the neopullulanase subfamily isolated from thermophilic species - (2008). Biologia, 63(6), 1006-1014.

  • Bryndis Bjornsdottir, Ólafur H. Friðjónsson, Steinunn Magnúsdóttir, Valgerður Andrésdóttir, Guðmundur Ó. Hreggviðsson, and Bjarnheiður K. Guðmundsdóttir. Characterization of an extracellular vibriolysin of the fish pathogen Moritella viscose - (2009). Veterinary Microbiology, 136(3-4), 326-334.

  • Snaedis H. Bjornsdottir, Solveig K. Petursdottir, Gudmundur O. Hreggvidsson, Sigurlaug Skirnisdottir, Sigridur Hjorleifsdottir, Johann Arnfinnsson, and Jakob K. Kristjansson. Thermus islandicus sp. nov., a mixotrophic, sulfur-oxidizing bacterium isolated from the Torfajokull geothermal area - (2009). International Journal of Systematic and Evolutionary Microbiology, 59(12), 2962-2966.

  • Sólveig K. Pétursdóttir, Guðmundur Ó. Hreggviðsson, Snædís H. Björnsdóttir, Sigríður Hjörleifsdóttir and Jakob K. Kristjánsson. Analysis of the unique geothermal microbial ecosystem of the Blue Lagoon - (2009). FEMS Microbiolgy Ecology, 70(3), 93-100.

  • Kristinn Olafsson, Sigridur Hjorleifsdottir, Christophe Pampoulie, Gudmundur Oli Hreggvidsson, Sigurdur Gudjonsson. Novel set of multiplex assays (SalPrint15) for efficient analysis of 15 microsatellite loci in the Atlantic salmon (Salmo salar) - (2010). Molecular Ecology Resources, 10, 533-537.

  • Meike Stelter, Ana M. P. Melo, Gudmundur O. Hreggvidsson, Sigridur Hjorleifsdottir, Lígia M. Saraiva, Miguel Teixeira, Margarida Archer. Structure at 1.0 Å resolution of a HiPIP involved in the aerobic respiratory chain of Rhodothermus marinus - (2010). JBIC Journal of Biological Inorganic Chemistry, 15(3), 303-313.

  • Tao Wang, Rósa Jónsdóttir, Hördur G. Kristinsson, Guðmundur Óli Hreggviðsson, Jón Óskar Jónsson, Guðrún Ólafsdóttir. Enzyme-enhanced extraction of antioxidant ingredients from the red algae Palmaria palmata - (2010). LWT – Food Science and Technology, 43(9), 1387-1393.

  • Aurelle, D., Baker, AJ., Bottin, L., Brouat, C., Caccone, A., Chaix, A.  Dhakal, P., Ding, Y.,   Duplantier, JM.,  Fiedler, W., Fietz, J., Fong, Y., Forcioli, D., Freitas, T.R.O., Gunnarsson, G.H.,    Haddrath, O., Hadziabdic, D., Hauksdottir, S., Havill, NP., Heinrich, M., Heinz, T.   Hjorleifsdottir, S., Hong, Y., Hreggvidsson, G.O., Huchette, S., Hurst, J., Kane, M., Kane, NC.,    Kawakami, T., Ke, W., Keith, RA., Klauke, N., Klein, JL., Kun, JFJ., Li, C., Li, GQ., Li, JJ., Loiseau, A., Lu, LZ., Lucas, M., Martins-Ferreira, C., Mokhtar-Jamai, K., Olafsson, K., Pampoulie, C.,  Pan, L., Pooler, MR., Ren, JD., Rinehart, TA., Roussel, V., Santos, MO., Schaefer, HM.,    Scheffler, BE., Schmidt,A., Segelbacher, G. Shen, JD., Skirnisdottir, S., Sommer, S., Tao, ZR., Taubert, R., Tian, Y., Tomiuk, J., Trigiano, RN., Ungerer, MC.,  van Wormhoudt, A., Wadl, PA., Wang, DQ., Weis-Dootz, Xia, Q., Yuan, QY. Permanent Genetic Resources added to the Molecular Ecology Resources Database 1 February 2010–31 March 2010 - (2010). Molecular Ecology Resources, 10(4), 751-754.

  • Gudmundur O. Hreggvidsson, Solveig Petursdottir, Snaedis Björnsdottir, Olafur H. Fridjonsson. Microbial speciation in the geothermal ecosystem. In: Adaption of microbial life to environmental extremes: Novel Research Results and Application - (2011). , , .

  • Christophe Pampoulie, Sigurlaug Skirnisdottir, Sigurbjorg Hauksdottir, Kristinn Olafsson, Hrafnkell Eiríksson, Valérie Chosson, Gudmundur O. Hreggvidsson, Gudmundur H. Gunnarsson, Sigridur Hjorleifsdottir. A pilot genetic study reveals the absence of spatial genetic structure in Norway lobster (Nephrops norvegicus) on fishing grounds in Icelandic waters - (2011). ICES Journal of Marine Science, 68(1), 20-25.

  • A. K. Imsland, R. Koedijk, S. O. Stefansson, A. Foss, S. Hjörleifsdóttir, G. Ó. Hreggviðsson, E. Otterlei, A. Folkvord. A retrospective approach to fractionize variation in body mass of Atlantic cod Gadus morhua - (2011). Journal of Fish Biology, 78, 251-264.

  • Gudmundur O. Hreggvidsson, Justyna M. Dobruchowska, Olafur H. Fridjonsson, Jon O. Jonsson, Gerrit J. Gerwig, Arnthor Aevarsson, Jakob K. Kristjansson, Delphine Curti, Robert R. Redgwell, Carl-Eric Hansen, Johannis P. Kamerling, Takoua Debeche-Boukhit. Exploring novel non-Leloir β-glucosyltransferases from proteobacteria for modifying linear (β1→3)-linked gluco-oligosaccharide chains - (2011). Glycobiology, 21(3), 304-328.

  • Bjornsdottir, S.H., Fridjonsson, O.H., Hreggvidsson, G.O., Eggertsson, G.. Generation of targeted deletions in the genome of Rhodothermus marinus - (2011). Applied and Environmental Microbiology, 77(15), 5505-5512.

  • Kale, V., Björnsdóttir, S.H., Fridjónsson, O.H., Pétursdóttir, S.K., Omarsdóttir, S., Hreggvidsson, G.O.. Litorilinea aerophila gen. nov., sp. nov., an aerobic member of  class Caldilineae, phylum Chloroflexi, isolated from an intertidal hot spring - (2013). International Journal of Systematic and Evolutionary Microbiology, 63(3), 1149-1154.

  • Zucko, J., Fridjonsson, O.H., Petursdottir, S.K., Gacesa, R., Diminic, J., Long, P.F., Cullum, J., Hranueli, D., Hreggvidsson, G.O., Starcevic, A.. Browsing metagenomes for novel starch and carbohydrate industry enzymes – AMYLOMICS case study - (2013). Current Opinion in Biotechnology, 24(Suppl 1), S21-S24.

  • Wang, L., Watzlawick, H., Fridjonsson, O., Hreggvidsson, G., Altenbuchner, J.. Improved soluble expression of the gene encoding amylolytic enzyme Amo45 by fusion with the mobile-loop-region of co-chaperonin GroES in Escherichia coli - (2013). Biocatalysis and Biotransformation, 31(6), 335-342.

  • Plotka M, Stefanska A, Kaczorowska A-K, Morzywolek A., Fridjonsson O., Dunin-Horkawicz S., Hreggvidsson  G.O., Kristjansson J.K., Dabrowski S., Bujnicki J., and Kaczorowski T.. Purification and characterization of a novel highly thermostable lysozyme from Thermus scotoductus MAT2119 bacteriophage Ph2119 that shows amino-acid sequence similarity to eukaryotic peptidoglycan recognition proteins (PGRPs) - (2013). Applied and Environmental Microbiology, 80(3), 886-895.

  • Stefanska, A., Kaczorowska, A.K., Plotka, M., Fridjonsson, O.H., Hreggvidsson, G.O., Hjorleifsdottir, S., Kristjansson, J.K., Dabrowski, S., Kaczorowski, T.. Discovery and characterization of RecA protein of thermophilic bacterium Thermus thermophilus MAT72 phage Tt72 that increases specificity of a PCR-based DNA amplification - (2014). Journal of Biotechnology, 28, 182-183.

  • Plotka, M., Kaczorowska, A-K., Stefanska, A., Morzywolek, A., Fridjonsson, O., Dunin-Horkawicz, S., Kozlowski, L., Hreggvidsson, G.O., Kristjansson, J.K., Dabrowski, S., Bujnicki, J., Kaczorowski, T.. Novel Highly Thermostable Endolysin from Thermus scotoductus MAT2119 Bacteriophage Ph2119 with Amino Acid Sequence Similarity to Eukaryotic Peptidoglycan Recognition Proteins - (2014). Applied and Environmental Microbiology, 80(3), 886-895.

  • Olafsson, K., Pampoulie, C., Hjorleifsdottir, S., Gudjonsson, S., Hreggvidsson, G.O.. Present-Day Genetic Structure of Atlantic Salmon (Salmo salar) in Icelandic Rivers and Ice-Cap Retreat Models - (2014). PlosOne, 9(2), 1-12.

  • Hjorleifsdottir, S., Aevarsson, A., Hreggvidsson, G.O., Fridjonsson, O.H., Kristjansson, J.K.. Isolation, growth and genome of the Rhodothermus RM378 thermophilic bacteriophage - (2014). Extremeophiles, 18, 261-270.

  • Hjorleifsdottir, S., Blondal, Th., Ævarsson, A., Fridjonsson, O.H., Ernstsson, S., Hreggvidsson, G.O., Mäntylä, E., Kristjansson, J.K.. Isothermal DNA amplification by a novel and non-ubiquitous Thermus polymerase A - (2014). Current Biotechnology, 3(1), 76-86.

  • Rückert C., Albersmeier A., Busche T., Jaenicke S., Winkler, A, Friðjónsson O.H., Hreggviðsson G.Ó., Lambert, C, Badcock D, Bernaerts K, Anne J., Economou A., Kalinowski J.. Complete genome sequence of Streptomyces lividans TK24 - (2015). Journal of Biotechnology, 199, 21-22.

  • Plotka, M, Kaczorowska A-K, Morzywolek A, Makowska J, Kozlowski LP, Thorisdottir A, Skírnisdottir S, Hjörleifsdottir S, Fridjonsson OH, Hreggvidsson GO, Kristjansson JK, Dabrowski S, Bujnicki JM, Kaczorowski T.. Biochemical characterization and validation of a catalytic site of a highly thermostable Ts2631 endolysin from the Thermus scotoductus phage vB_Tsc2631 - (2015). PlosOne, 10(9), e0137374.

  • Kale V., Fridjonsson O., Jonsson J.O., Kristinsson H., Ómarsdottir, S, Hreggvidsson G.O.. Chondroitin Lyase from a Marine Arthrobacter sp. MAT3885 for the Production of Chondroitin Sulfate Disaccharides - (2015). Marine Biotechnology, 17(4), 479-492.

  • Ara K.Z.G., Lundemo P., Fridjonsson O.H., Hreggvidson G.O., Adlercreutz P., Karlsson E.N.. A CGTase with high coupling activity using {gamma}-cyclodextrin isolated from a novel strain clustering under the genus Carboxydocella - (2015). Glycobiology, 25(5), 514-523.

  • Stefánsson, A., Keller, N.S., Gunnarsson Robin, J., Kaaslainen, H., Björnsdóttir, S., Pétursdóttir, S., Jóhannesson, H., Hreggvidsson, G.Ó.. Quantifying Mixing, Boiling, Degassing, Oxidation and Reactivity of Thermal Waters At Vonarskard, Iceland - (2016). Journal of Volcanology and Geothermal Research, 309, 53-62.

  • Sardari, R.R.R., Kulcinskaja, E., Ron, E.Y.C., Bjornsdottir, S., Fridjonsson, O.H., Hreggvidsson, G.O., Nordberg Karlsson, E.. Evaluation of the production of exopolysaccharides by two strains of the thermophilic bacterium Rhodothermus marinus - (2016). Carbohydrate Polymers, 156, 1-8.

  • Purves, K., Macintyre, L., Brennan, D., Hreggvidsson, G.O., Kuttner, E., Asgeirsdottir, M.E., Young, L.C., Green, D.H., Ruangelie, E.-E., Duncan, K.R.. Using Molecular Networking for Microbial Secondary Metabolite Bioprospecting - (2016). Metabolites, 6(1), 2.

  • Olafsson, K., Einarsson, S.M., Gilbey, J., Pampoulie, C., Hreggvidsson, G.O., Hjorleifsdottir, S., Gudjonsson, S.. Origin of Atlantic salmon (Salmo salar) at sea in Icelandic waters - (2016). ICES Journal of Marine Science, 73(6), 1525-1532.

  • Lange, L., Björnsdóttir, B., Brandt, A., Hildén, K., Hreggviðsson, G.O., Jacobsen, B., Jessen, A., Karlsson, E.N., Lindedam, J., Mäkelä, M., Smáradóttir, S.E., Vang, J. & Wentzel, A.. Development of the Nordic Bioeconomy - (2016). Nordic Council of Ministers, , 7-216.

  • Dobruchowska, J. M., Jonsson, J. O., Fridjonsson, O. H., Aevarsson, A., Kristjansson, J. K., Altenbuchner, J., Watzlawick, H.,Gerwig, G. J., Dijkhuizen, L., Kamerling, J. P. & Hreggvidsson, G. O.. Modification of linear (β1→3)-linked gluco-oligosaccharides with a novel recombinant β-glucosyltransferase (trans-β-glucosidase) enzyme from Bradyrhizobium diazoefficiens - (2016). Glycobiology, , .

  • Stefaniak-Viðarsson, M.M., Kale, V.A., Guðjónsdóttir, M., Marteinsdóttir, G., Friðjónsson, Ó., Hreggviðsson, G.Ó., Sigurjónsson, Ó.E., Ómarsdottir, S., Kristbergsson, K.. Bioactive effect of sulphated polysaccharides derived from orange-footed sea cucumber (Cucumaria frondosa) toward THP-1 macrophages - (2017). Bioactive Carbohydrates and Dietary Fibre, 12, 14-19.

  • Saradi R.R.R., Kulcinskaja E., Ron E.Y.C., Bjornsdottir S., Fridjonsson O.H., Hreggvidsson G.O., Karlsson E.N.. Evaluation of the production of exopolysaccahrides by two strains of the thermophilic bacterium Rhodothermus marinus - (2017). Carbohydrate Polymers, 156, 1-8.

  • Gacesa R., Zucko J., Pétursdóttir  S.K., Gudmundsdottir E.E., Fridjonsson O.H., Diminic J., Long P.F., Cullum J., Hranueli D., Hreggvidsson G.O., Starcevic A.. MEGGASENSE -the Metagenome/Genome Annotated Sequence Natural Language Search Engine: a Platform for the Construction of Sequence Data Warehouses - (2017). Food Technology and Biotechnology, 55(2), 251-257.

  • Ron, E.Y.C., Plaza, M., Kristjánsdóttir, T., Sardari, R.R.R., Björnsdóttir, S.H., Guðmundsson, S., Hreggviðsson, G.Ó., Turner, C., van Niel, E.W.J., Nordberg-Karlsson, E.. Characterization of carotenoids in Rhodothermus marinus - (2018). Microbiology Open, 7(1), e00536.

  • Edrada-Ebel, R., Ævarsson, A., Polymenakou, P., Hentschel, U., Carettoni, D., Day, J., Green, D., Hreggviðsson, G.O., Harvey, L., McNeil, B.. SeaBioTech: From Seabed to Test-Bed: Harvesting the potential of marine biodiversity for industrial Biotechnology - (2018). Grand Challenges in Biology and Biotechnology, , 451-504.

  • Ron, E.Y.C., Sardari, R.R.R., Anthony, R., van Niel, E., Hreggvidsson, G.O. Karlsson, N.E.. Cultivation technology development of Rhodothermus marinus DSM 16675 - (2019). Extremophiles, 23, 735-745.

  • Bjarnadóttir, M., Aðalbjörnsson, B.V., Nilsson, A., Slizyte, R., Roleda, M.Y., Hreggviðsson, GÓ., Friðjónsson, Ó.H., Jónsdóttir, R., R.. Palmaria palmata as an alternative protein source: enzymatic protein extraction, amino acid composition, and nitrogen-to-protein conversion factor - (2018). Journal of Applied Phycology, 30(3), 2061-2070.

  • Reynisson, E.,  Marteinsson, V. Th., Jonsdottir, R., Magnusson, S. H., Hreggvidsson, G.O.. Bacterial succession during curing process of a skate (Dipturus batis) and isolation of novel strains - (2012). Journal of Applied Microbiology, 113(2), 329-338.

  • Marc Kochzius, Christian Seidel, Aglaia Antoniou, Sandeep Kumar Botla, Daniel Campo, Alessia Cariani, Eva Garcia Vazquez, Janet Hauschild, Caroline Hervet, Sigridur Hjörleifsdottir, Gudmundur Hreggvidsson, Kristina Kappel, Monica Landi, Antonios Magoulas, Viggo Marteinsson, Manfred Nölte, Serge Planes, Fausto Tinti, Cemal Turan, Moleyur N. Venugopal, Hannes Weber, Dietmar Blohm. Identifying Fishes through DNA Barcodes and Microarrays - (2010). PlosOne, 5(9), e12620.

  • Eyjólfur Reynisson, Birna Guðbjörnsdóttir, Viggó Þór Marteinsson and Guðmundur Óli Hreggviðsson. Decontamination Efficiency of Fish Bacterial Flora from Processing Surfaces - (2009). Food Technology and Biotechnology, 47(1), 75-82.

  • Eyjólfur Reynisson, Hélène Liette Lauzon, Hannes Magnússon, Rósa Jónsdóttir, Guðrún Ólafsdottir, Viggó Marteinsson, Guðmundur Óli Hreggviðsson. Bacterial composition and succession during storage of North-Atlantic cod (Gadus morhua) at superchilled temperatures - (2009). BMC Microbiology, 9(1), 250.

  • Kochzius, M., Nölte, M., Weber, H., Silkenbeumer, N., Sigríður Hjörleifsdottir, Guðmundur Óli Hreggvidsson, Viggó Marteinsson, Kappel, K., Planes, S., Tinti, F., Magoulas, A., Garcia Vazquez, E., Turan, C., Hervet, C., Campo Falgueras, D., Antoniou, A., Landi, M. and Blohm, D.. DNA Microarrays for Identifying Fishes - (2008). Marine Biotechnology, 10(2), 207-217.

  • Marc Kochzius, Kristina Kappel, Lutz Döbitz, Nina Silkenbeumer, Manfred Nölte, Hannes Weber, Sigridur Hjörleifsdottir, Viggo Marteinsson, Gudmundur Hreggvidsson, Serge Planes, Fausto Tinti, Andonis Magoulas, Eva Garcia Vazquez, Cemal Turan, Linda Medlin, Katja Metfies, Christine Gescher, Alessia Cariani, Monica Landi, Caroline Hervet, Daniel Campo Falgueras, Cilia Antoniou, Fabio Bertasi, Chitipothu Srujana, Dietmar Blohm. The “Fish & Chips” project: Microarrays as a standard tool for identification of marine organisms in biodiversity and ecosystem research - (2007). , , .

    • Ritaskrá / Publications

    Rannsóknarritgerðir / Theses

    Guðmundur Ó. Hreggviðsson 1993. Cytochromes c and the evolution of Gram positive bacteria. Ph.D. Thesis, Háskólinn í Edinburgh. 301 bls.

    Guðmundur Óli Hreggviðsson. 1986. Framköllun fasabreytinga og leit að glycine og proline tRNA byrgjum í E. coli. 4.árs rannsóknarritgerð við Háskóla Íslands, 109 bls.

    Ritrýndar greinar / Peer-reviewed articles:

    2018:

    Bjarnadottir, M., Adalbjornsson, B.V., Nilsson, A., Slizyte, R., Roleda, M.Y., Hreggvidsson, G.O., Fridjonsson, O.H., Jonsdottir, R. 2018. Palmaria palmata as an alternative protein source: enzymatic protein extraction, amino acid composition, and nitrogen-to-protein conversion factor. Journal of Applied Phycology. Published online: 13.01.2018.  Grein / Article

    2014:

    Kristinn Olafsson, Christophe Pampoulie, Sigridur Hjorleifsdottir, Sigurdur Gudjonsson, Gudmundur O. Hreggvidsson. 2014. Present-Day Genetic Structure of Atlantic Salmon (Salmo salar) in Icelandic Rivers and Ice-Cap Retreat Models. PLoS One. 9(2), 1-12.  Grein / Article

    2013:
    Plotka M, Stefanska A, Kaczorowska A-K, Morzywolek A., Fridjonsson O., Dunin-Horkawicz S., Hreggvidsson  G.O., Kristjansson J.K., Dabrowski S., Bujnicki J., and Kaczorowski T. Purification and characterization of a novel highly thermostable lysozyme from Thermus scotoductus MAT2119 bacteriophage Ph2119 that shows amino-acid sequence similarity to eukaryotic peptidoglycan recognition proteins (PGRPs). Applied and Environmental Microbiology. Published Online November 2013  Grein / Article

    Wang, L., Watzlawick, H., Fridjonsson, O., Hreggvidsson, G., Altenbuchner, J. 2013.  Improved soluble expression of the gene encoding amylolytic enzyme Amo45 by fusion with the mobile-loop-region of co-chaperonin GroES in Escherichia coli. Biocatalysis and Biotransformation. 31(6), 335-342.  Grein / Article

    Kale, V., Freysdottir, J., Paulsen, B.S., Friðjónsson, O.H., Hreggviðsson, G.O., Omarsdottir, S. 2013. Sulphated polysaccharide from the sea cucumber Cucumaria frondosa affect maturation of human dendritic cells and theiractivation of allogeneic CD4(þ) T cells in vitro. Bioactive Carbohydrates and Dietary Fibre. 2(2), 108–117. Grein / Article

    Zucko, J., Fridjonsson, O.H., Petursdottir, S.K., Gacesa, R., Diminic, J., Long, P.F., Cullum, J., Hranueli, D., Hreggvidsson, G.O., Starcevic, A. 2013. Browsing metagenomes for novel starch and carbohydrate industry enzymes – AMYLOMICS case study. Current Opinion in Biotechnology. 24(Suppl 1), S21-S24. Grein / Article

    Kale, V., Björnsdóttir, S.H., Fridjónsson, O.H., Pétursdóttir, S.K., Omarsdóttir, S., Hreggvidsson, G.O. 2013. Litorilinea aerophila gen. nov., sp. nov., an aerobic member of  class Caldilineae, phylum Chloroflexi, isolated from an intertidal hot spring. International Journal of Systematic and Evolutionary Microbiology. 63(3), 1149-1154. Grein / Article  

    2012:
    Eyjólfur Reynisson, Viggó Th Marteinsson, Rósa Jonsdottir, Sveinn H. Magnusson, Guðmundur Óli Hreggvidsson. 2012. Bacterial succession during curing process of a skate (Dipturus batis) and isolation of novel strains. Journal of Applied Microbiology. 113(2), 329-338. Grein / Article

    2011:
    Bjornsdottir, S.H., Fridjonsson, O.H., Hreggvidsson, G.O., Eggertsson, G. 2011. Generation of targeted deletions in the genome of Rhodothermus marinus. Applied and Environmental Microbiology. 77(15), 5505-5512.  Grein / Article

    Gudmundur O. Hreggvidsson, Justyna M. Dobruchowska, Olafur H. Fridjonsson, Jon O. Jonsson, Gerrit J. Gerwig, Arnthor Aevarsson, Jakob K. Kristjansson, Delphine Curti, Robert R. Redgwell, Carl-Eric Hansen, Johannis P. Kamerling, Takoua Debeche-Boukhit. 2011. Exploring novel non-Leloir {beta}-glucosyltransferases from proteobacteria for modifying linear ({beta}1->3)-linked gluco-oligosaccharidechains. Glycobiology. 21(3), 304-328. Grein / Article

    A. K. Imsland, R. Koedijk, S. O. Stefansson, A. Foss, S. Hjörleifsdóttir, G. Ó. Hreggviðsson, E. Otterlei, A. Folkvord. 2011.A retrospective approach to fractionize variation in body mass of Atlantic cod Gadus morhua. Journal of Fish Biology, 78, 251-264.  Grein / Article

    2010:

    Gudmundur O. Hreggvidsson, Justyna M. Dobruchowska, Olafur H. Fridjonsson, Jon O. Jonsson, Gerrit J. Gerwig, Arnthor Aevarsson, Jakob K. Kristjansson, Delphine Curti, Robert R. Redgwell, Carl-Eric Hansen, Johannis P. Kamerling, Takoua Debeche-Boukhit. Exploring novel non-Leloir {beta}-glucosyltransferases from proteobacteria for modifying linear ({beta}1->3)-linked gluco-oligosaccharidechains. Glycobiology. Published Online Oct 2010. Grein / Article

    Christophe Pampoulie, Sigurlaug Skirnisdottir, Sigurbjorg Hauksdottir, Kristinn Olafsson, Hrafnkell Eiríksson, Valérie Chosson, Gudmundur O. Hreggvidsson, Gudmundur H. Gunnarsson, Sigridur Hjorleifsdottir. 2010. A pilot genetic study reveals the absence of spatial genetic structure in Norway lobster (Nephrops norvegicus) on fishing grounds in Icelandic waters. ICES Journal of Marine Science. Advance Access November 11. Grein / Article

    Marc Kochzius, Christian Seidel, Aglaia Antoniou, Sandeep Kumar Botla, Daniel Campo, Alessia Cariani, Eva Garcia Vazquez, Janet Hauschild, Caroline Hervet, Sigridur Hjörleifsdottir, Gudmundur Hreggvidsson, Kristina Kappel, Monica Landi, Antonios Magoulas, Viggo Marteinsson, Manfred Nölte, Serge Planes, Fausto Tinti, Cemal Turan, Moleyur N. Venugopal, Hannes Weber, Dietmar Blohm. 2010. Identifying Fishes through DNA Barcodes and Microarrays. PLoS One, 5(9): e12620.  Grein / Article 

    Aurelle, D., Baker, AJ., Bottin, L., Brouat, C., Caccone, A., Chaix, A.  Dhakal, P., Ding, Y., Duplantier, JM., Fiedler, W., Fietz, J., Fong, Y., Forcioli, D., Freitas, T.R.O., Gunnarsson, G.H., Haddrath, O., Hadziabdic, D., Hauksdottir, S., Havill, NP., Heinrich, M., Heinz, T.   Hjorleifsdottir, S., Hong, Y., Hreggvidsson, G.O., Huchette, S., Hurst, J., Kane, M., Kane, NC., Kwakami, T., Ke, W., Keith, RA., Klauke, N., Klein, JL., Kun, JFJ., Li, C., Li, GQ., Li, JJ., Loiseau, A., Lu, LZ., Lucas, M., Martins-Ferreira, C., Mokhtar-Jamai, K., Olafsson, K., Pampoulie, C., Pan, L., Pooler, MR., Ren, JD., Rinehart, TA., Roussel, V., Santos, MO., Schaefer, HM., Scheffler, BE., Schmidt,A., Segelbacher, G. Shen, JD., Skirnisdottir, S., Sommer, S., Tao, ZR., Taubert, R., Tian, Y., Tomiuk, J., Trigiano, RN., Ungerer, MC.,  van Wormhoudt, A., Wadl, PA., Wang, DQ., Weis-Dootz, Xia, Q., Yuan, QY. 2010. Permanent Genetic Resources added to the Molecular Ecology Resources Database 1 February 2010–31 March 2010. Molecular Ecology Resources, 10(4), 751-754. Grein / Article

    Tao Wang, Rósa Jónsdóttir, Hördur G. Kristinsson, Guðmundur Óli Hreggviðsson, Jón Óskar Jónsson, Guðrún Ólafsdóttir. 2010. Enzyme-enhanced extraction of antioxidant ingredients from the red algae Palmaria palmata. LWT – Food Science and Technology. 43(9), 1387-1393. Grein / Article

    Meike Stelter, Ana M. P. Melo, Gudmundur O. Hreggvidsson, Sigridur Hjorleifsdottir, Lígia M. Saraiva, Miguel Teixeira, Margarida Archer. 2010. Structure at 1.0 Å resolution of a HiPIP involved in the aerobic respiratory chain of Rhodothermus marinus. JBIC Journal of Biological Inorganic Chemistry, 15 (3) 303-313.  Grein / Article

    Kristinn Olafsson, Sigridur Hjorleifsdottir, Christophe Pampoulie, Gudmundur Oli Hreggvidsson, Sigurdur Gudjonsson. 2010. Novel set of multiplex assays (SalPrint15) for efficient analysis of 15 microsatellite loci in the Atlantic salmon (Salmo salar). Molecular Ecology Resources, 10, 533–537. Grein / Article

    S. Skirnisdottir, K. Olafsson, S. Hauksdottir, C. Pampoulie, G. O. Hreggvidsson, G.H. Gunnarsson, and S. Hjorleifsdottir. 2010. Isolation and characterization of eight new microsatellite loci in the Norway lobster, Nephrops norvegicus (Linnaeus, 1758). Molecular Ecology Resources. 10: 751-754.

    2009:

    Petursdottir, Solveig K. ; Bjornsdottir, Snaedis H.; Hreggvidsson, Gudmundur O.; Hjorleifsdottir, Sigridur ; Kristjansson, Jakob K. 2009. Analysis of the unique geothermal microbial ecosystem of  the Blue Lagoon. FEMS Microbiolgy Ecology. 70(3) 93-100.Grein / Article

    Eyjólfur Reynisson, Hélène Liette Lauzon, Hannes Magnússon, Rósa Jónsdóttir, Guðrún Ólafsdottir, Viggo Þór Marteinsson, Guðmundur Óli Hreggviðsson. 2009. Bacterial composition and succession during storage of North-Atlantic cod (Gadus morhua) at superchilled temperatures. BMC Microbiology. 9(1) 250. Grein / Article

    Snaedis H. Bjornsdottir, Solveig K. Petursdottir, Gudmundur O. Hreggvidsson, Sigurlaug Skirnisdottir, Sigridur Hjorleifsdottir, Johann Arnfinnsson, and Jakob K. Kristjansson. 2009. Thermus islandicus sp. nov., a mixotrophic, sulfur-oxidizing bacterium isolated from the Torfajokull geothermal area. International Journal of Systematic and Evolutionary Microbiology.59 (12) 2962-2966. Grein / Article

    Bryndis Bjornsdottir, Ólafur H. Friðjónsson, Steinunn Magnúsdóttir, Valgerður Andrésdóttir, Guðmundur Ó. Hreggviðsson, and Bjarnheiður K. Guðmundsdóttir. 2009. Characterization of an Extracellular Vibriolysin of the Fish Pathogen Moritella viscose. Veterinary Microbiology. 136 (3-4) 326-334. Grein / Article

    Eyjólfur Reynisson, Birna Guðbjornsdottir, Viggo Þór Marteinsson and Guðmundur Óli Hreggviðsson 2009. Decontamination Efficiency of Fish Bacterial Flora from Processing Surfaces. Food Technology and Biotechnology. 47 (1) 75-82. Grein / Article.

    2008:

    Eva Nordberg Karlsson, Antje Labes, Pernilla Turner, Olafur H. Fridjonsson,Christina Wennerberg, Tania Pozzo, Gudmundur O. Hreggvidson, Jakob K. Kristjansson and Peter Schönheit. 2008 Differences and similarities in enzymes from the neopullulanase subfamily isolated from thermophilic species. Biologia 63 (6):1006—1014 Grein / Article

    Eyjólfur Reynisson, Hélène Liette Lauzon, Hannes Magnússon, Guðmundur Óli Hreggviðsson, Viggó Þór Marteinsson. 2008. Rapid quantitative monitoring method for the fish spoilage bacteria Pseudomonas. Journal of Environmental Monitoring 10: 1357-1362 Grein / Article

    Kochzius, M., Nölte, M., Weber, H., Silkenbeumer, N., Sigríður Hjörleifsdottir, Guðmundur Óli Hreggvidsson, Viggó Marteinsson, Kappel, K., Planes, S., Tinti, F., Magoulas, A., Garcia Vazquez, E., Turan, C., Hervet, C., Campo Falgueras, D., Antoniou, A., Landi, M. and Blohm, D. (2008) DNA Microarrays for Identifying Fishes. Marine Biotechnology 10 (2), 207-217. Grein / Article

    Antje Labes, Eva Nordberg Karlsson, Olafur H. Fridjonsson, Pernilla Turner, Gudmundur O. Hreggvidson, Jakob K. Kristjansson, Olle Holst, and Peter Schönheit. 2008. Novel members of glycoside hydrolase family 13 derived from environmental DNA. Applied and Environmental Microbiology 74 (2): 1914-1921. Grein / Article

    Sigurlaug Skírnisdóttir,Christophe Pampoulie, Sigurbjörg Hauksdóttir, Inga Schulte, Kristinn Ólafsson,Guðmundur Ó. Hreggviðsson, Sigríður Hjörleifsdóttir. 2008. Characterization of 18 new microsatellite loci in Atlantic cod (Gadus morhua L.) Molecular Ecology Resources, 8 (6), 1503-1505. Grein / Article

    Cédric F.V. Hobel, Viggó T. Marteinsson, Gudmundur Ó. Hreggvidsson and Jakob K. Kristjánsson. 2008. Microbial diversity of the Grimsey high-temperature vent Field on the subpolar Mid-Atlantic Ridge. Extremophiles. (Submitted)

    2007:

    Manuela M. Pereira, Patricia N. Refojo, Gudmundur O. Hreggvidsson, Sigridur Hjorleifsdottir and Miguel Teixeira. 2007. The alternative complex III from Rhodothermus marinus – a prototype of a new family of quinol: electron acceptor oxidoreductases. Biochemistry. FEBS Letters, 581 (25), 4831-4835. Grein / Article

    Verissimo, A., Pereira, M., Melo, A., Hreggvidsson, GO., Texeira, M. And Kristjansson, JK. 2007. A ba3 oxygen reductase from the thermohalophilic bacterium Rhodothermus marinus. FEMS Microbiology Letters, 269:41-47.  Grein / Article

    Hákon Birgisson, Jon Oskar Wheat, Gudmundur O Hreggvidsson, Jakob K Kristjansson and Bo Mattiasson. 2007. Immobilization of a recombinant Escherichia coli producing a thermostable alpha-L-rhamnosidase; creation of a bioreactor for hydrolyses of naringen” Enzyme and Microbial Technology. 40:1181-1187. Grein / Article

    Carla Jorge, Maria Sampaio, Gudmundur Hreggvidsson, Jakob Kristjánson, 2007. A highly thermostable trehalase from the thermophilic bacterium Rhodothermus marinus. Extremophiles. 11:116-122. Grein / Article

    2006:

    Gudmundur O. Hreggvidsson, Sigurlaug Skirnisdottir, Bart Smit, Sigridur Hjorleifsdottir Viggo T. Marteinsson, Solveig Petursdottir and Jakob K. Kristjansson. 2006. Polyphasic analysis of Thermus isolates from geothermal areas in Iceland. Extremophiles, 10 (6) pp 563-575. Grein / Article

    Klara Björg Jakosdóttir, Þóra Dögg Jörundsdóttir, Sigurlaug Skírnisdóttir, Sigrídur Hjörleifsdóttir, Guðmundur Ó. Hreggviðsson, Anna Kristín Daníelsdóttir & Christophe Pampoulie. 2006. Nine polymorphic microsatellite loci for the amplification of archived otolith DNA of Atlantic cod, Gadus morhua. Molecular Ecology Notes. 6: 337–339.

    Snaedis H. Bjornsdottir, Thorarinn Blöndal, Gudmundur Hreggvidsson, Gudmundur Eggertsson, Solveig Petursdottir, Sigridur Hjorleifsdottir, Sigridur Thorbjarnardottir, Jakob K. Kristjansson, 2006. Rhodothermus marinus Physiology and Molecular Biology. Extremophiles. 10:1-16. Grein / Article

    2005:

    Ana M. P. Melo, Susana A. L. Lobo, Filipa L. Sousa, Andreia S. Fernandes, Manuela M. Pereira, Gudmundur O. Hreggvidsson, Jakob K. Kristjansson, Lígia M. Saraiva, and Miguel Teixeira. 2005. A nhaD Na+/H+ antiporter and a pcd homologues are among the Rhodothermus marinus complex I genes. BBA Bioenergetics. 96:95-103.

    Turner, P., Labes, A., Fridjonsson, O.H., Hreggvidsson, G.O.H., Schönheit, P., Kristjansson, J.K., Holst, O., and Nordberg-Karlsson, E. 2005. Two novel cyclodextrin-degrading enzymes isolated from thermophilic bacteria have similar domain structures but differ in oligomeric state and activitiy profile. Journal of Bioscience and Bioengineering, 4:380-390.

    Hobel, C.F.V., Marteinsson, V.T., Hreggvidsson G.O. and Kristjansson J.K. 2005. Investigation of the microbial ecology of intertidal hot springs by using diversity anlysis of 16S rRNA and chitinase genes. Applied and Evironmental Microbiology 71(5) : 2771-2776 Grein / Article

    Blondal, Th., Hjorleifsdottir, S., Fridjonsson,OF., Ævarsson, A., Skirnisdottir, S.,  Hermannsdottir, AG.,  Hreggvidsson, GO., Smith AV.,   and Kristjansson, JK.  2005. Discovery and Characterization of a novel 5′ polynucleotide kinase – 3′ phosphatase from the RM378 bacteriophage. – Evidence for domain shuffling.  Journal of Biological Chemistry. 280(7):5188-94.

    Blondal, Th., Thorisdottir A., Unnsteinsdottir U., Hjorleifsdottir, S., Ævarsson, A., Fridjonsson, OH., Skirnisdottir,  S., Wheat, JO., Hermannsdottir, AG., Sigurdsson, S.Th., Hreggvidsson, GO., Smith AV., and Kristjansson, JK. 2005. Isolation and characterization of a thermostable RNA ligase 1 from a Thermus scotoductus bacteriophage TS2126 with good single-stranded DNA ligation properties.  Nucleic Acid Research. 33:135-142.

    Cedric F. V. Hobel , Gudmundur O. Hreggvidsson, Viggo T. Marteinsson, Farah Bahrani-Mougeot, Jon M. Einarsson,and Jakob K.Kristjansson 2005. Cloning, expression, and characterization of a highly thermostable family 18 chitinase from Rhodothermus marinus. Extremophilies. 9(1):53-64. Grein / Article

    Hobel, C.F.V., Marteinsson, V.T., Hreggvidsson G.O. and Kristjansson J.K. 2005. Investigation of the microbial ecology of intertidal hot springs by using diversity anlysis of 16S rRNA and chitinase genes. Applied and Evironmental Microbiology 71(5) : 2771-2776  Grein / Article

    2004:

    Birgisson. H., Fridjonsson, O., Bahrani-Mougeot, F.K., Hreggvidsson, G.O. Kristjansson, J.K. and Mattiasson, B. 2004. A new thermostable a-L-arabinofuranosidase from a novel thermophilic bacterium. Biotechnology Letters 26: 1347-1351.

    Nordberg Karlsson, Eva, Abou Hachem, Maher; Ramchuran, Santosh;  Costa, Hugo; Holst, Olle; Fex Svenningsen, Åsa; Hreggvidsson, Gudmundur. 2004. The modular xylanase Xyn10A from Rhodothermus marinus is cell-attached, and its C-terminal domain has several putative homologues among cell-attached proteins within the phylum   Bacteroidetes. FEMS Microbiology Letters. 241:233-42.

    Hobel, CFV., Marteinsson, VT., S Hauksdóttir, S., Fridjónsson, OH., Skírnisdóttir, S., Hreggvidsson, GÓ.,  and Kristjánsson, JK., 2004. Accessing novel amylase genes in silent thermophile diversity by low nutrient enrichments.  World Journal of Microbiology and Biotechnology, 20:801-809. Grein / Article

    Hákon Birgisson, Guðmundur Ó Hreggviðsson, Ólafur H Friðjónsson, Jakob K Kristjánsson and Bo Mattiasson. 2004. Two new thermostable  alpha-L-rhamnosidases from a novel thermophilic bacterium.  Enz.Microb.Technol. 34, 561-571.

    2003:

    Abou-Hachem, F. Olsson, M.P. Williamson, S. Linse, S.J. Crennell, G.O. Hreggvidsson, O. Holst, and E. Nordberg Karlsson. 2003. The modular organisation and stability of a thermostable family 10 xylanase. Biocatlysis and Biotransformation. 21:253-260.

    Thorarinn Blondal, Sigridur H. Hjorleifsdottir, Olafur F. Fridjonsson, Arnthor Ævarsson, Sigurlaug Skirnisdottir, Anna Gudny Hermannsdottir, Gudmundur O. Hreggvidsson, Albert Vernon Smith, and Jakob K. Kristjansson. 2003. Discovery and characterization of a thermostable bacteriophage RNA ligase homologous to T4 RNA ligase 1. Nucleic Acids Research, 2003 31: 7247-7254.

    2002:

    Crennell, SJ., Hreggvidsson, GO. and  Nordberg-Karlsson, E. 2002. The structure of Rhodothermus marinus Cel12A, a highly thermostable family 12 endonuclease, at 1.8 A Resolution. Journal of Molecular Biology, 320:883-897.

    2001:

    Marteinsson, VT., Hauksdóttir, S., Hobel., CF., Kristmannsdóttir, H., Hreggvidsson, GO., Kristjansson, JK . 2001. Phylogentic diversity analysis of subterranean hot springs in Iceland. Applied and Environmental Microbiology, l 67:4242-4248. Grein / Article

    Wicher, KB., Abou-Hachem, M., Halldorsdottir, S., Thorbjarnardottir, SH., Eggertsson, G., Hreggvidsson, GO., Nordberg-Karlsson, E., Holst, O.  2001 Deletion of a cytotoxic, N-terminal putative signal peptide results in a significant increase in production yields in Escherichia coli and improved specific activity of Cel12A from Rhodothermus marinus. Applied  Microbiology and Biotechnology, 55:578-584.

    Irwin, A.J., Gudmundsson, H.M, Marteinsson, V.Th., Hreggvidsson, G.O., Lanzetti, A.J;. Alfredsson, G.A. and Engel, P.C.  2001. Characterisation of alanine andmalate dehydrogenases from a marine psycrophilic strain PA-43. Extremophiles, 5:199-211.

    Skirnisdottir, S. Hreggvidsson, G.O. Holst, O. and Kristjansson, J.K. 2001. A new ecological adaptatin to high sulfide by a Hydrogeonbacter sp. growing on sulfur compounds, but not on hydrogen. Microbiological Research, 156:41-47

    Skirnisdottir, S. Hreggvidsson, G.O. Holst, O. and Kristjansson, J.K . 2001. Isolation and characterization of  a mixotrophic sulfur oxidizing  Thermus scotoductus. Extremophiles, 5:45-51.

    Hjorleifsdottir, S., Skirnisdottir, S., Hreggvidsson, G.O., Holst, O.  and Kristjansson, J.K . 2001. Species composition  of cultivated and non-cultivated bacteria from short filaments in a Icelandic hot spring at 88°C. Microbiology and.Ecology, 42:117-125.

    2000:

    Skirnisdottir, S, Hreggvidsson, G.O., Hjorleifsdottir, S. Marteinsson, V.Th., Petursdottir, S.K., Holst, O. and Kristjansson, J.K . 2000. Influence of sulfide and temperature on species composition and community structure of hot spring microbial mats. Applied and Environmental Microbiology, 66: 2835-2841.  Lesa grein

    Petursdottir, K.S., Hreggvidsson, G.O., Da Costa, M.S. and Kristjansson, J.K . 2000. Genetic diversity analysis of Rhodothermus marinus reflects geographical origin of the isoalates. Extremeophiles, 4:267-274. DOI Grein / Article

    1986 – 1997:

    Halldorsdottir, S., Thorolfsdottir, E.Th., Spilliaert, R., Thorbjarnardottir, S., Palsdottir, A., Hreggvidsson, G.O., Johannesson, M., Holst, O.,  Kristjansson, J.K. and Eggertsson, G. 1997. Cloning and overexpression of a Rhodothermus marinus gene encoding cellulase of glycosyl family 13. Appl. Microbiol. Biotechnol. 49:277-284.

    Radax,C., Sigurdsson,O., Hreggvidsson,G.O., Aichinger, N., Gruber,C., Kristjansson, J.K. and Stan-Lotter,H., 1997. F and V-ATPases in the genus Thermus and related species. System. Appl. Microbiol 21:12-22.

    Manelius, Åsa., Holst, O., Hreggvidsson, G.O., Kristjansson, J.K., Raven, N., andSharp., R., 1996. Continuous cultivation of Hydrogenobacter thermophilus at low partial pressures of hydrogen. Biotechnology techniques. 11:177-181.

    Hreggvidsson, G.O. Kaiste, E., Holst, O., Eggertsson, G., Palsdottir, A., and Kristjansson, J.K. 1996. An extremely thermostable cellulase from the thermophilic eubacterium Rhodothermus marinus.   Appl. Environ. Microbiol. 62:3047-3049.

    Hreggviðsson, G.Ó., Gustavsson, Th., Holst, O., Kronsbein, K.,  Hjörleifsdóttir, S., Skjenstad, T.  and Kristjansson, J.K. 1995. Large scale cultivation of Hydrogenobacter thermophilus grown on hydrogen. Lett. Appl. Microbiol. 21:277-281.

    Jakob K. Kristjansson and Gudmundur O. Hreggvidsson. 1994. Ecology and habitats of extremophiles. World. J. Microbiol. Biotechnol. 11:17-25

    Spillaert, R. Hreggvidsson, G.O., Kristjansson, J.K., Eggertsson, G. and Palsdottir, 1994. Cloning and sequencing of a Rhodothermus marinus gene, bglA, coding for a thermostable b-glucanase in Eschericha coli.. Eur. J. Biochem. 224:923-930.

    Guðmundur Óli Hreggviðsson. 1991.  Two structurally different cytochromes c from Bacillus azotoformans, on the evolution of Gram-positive bacteria. Biochim. Biophys. Acta. 1058:52-55.

    Kristjánsson, J.K,  G.Ó. Hreggviðsson and G. Alfreðsson. 1986. Isolation of halotolerant Thermus spp. from submarine hot springs in Iceland.Appl. Environ. Microbiol. 52: 1313-1316.

    SKÝRSLUR / REPORTS

    Sólveig Pétursdóttir, Guðmundur Óli Hreggviðsson. Lífdísel með ljósvirkjandi örverum / Biodiesel from photosynthetic organisms. Skýrsla Matís 22-11, 24 s. Lokuð skýrsla. Skýrsluágrip.

    Sólveig K. Pétursdóttir, Snædís H. Björnsdóttir, Guðmundur Óli Hreggviðsson, Sólveig Ólafsdóttir. Lífríki í hverum á háhitasvæðum á Íslandi. Heildarsamantekt unnin vegna Rammaáætlunar. Lokaskýrsla. Skýrsla Matís 42-10, 41 s.

    Guðmundur Óli Hreggviðsson, Ólafur H. Friðjónsson, Þorleifur Ágústsson, Sigríður Hjörleifsdóttir, Kjell Hellman, Filipe Figueiredo, Helgi Thorarensen. Photoperiod and genetics of growth and maturity in cod (Gadus morhua). Skýrsla Matís 13-10, 43 s. Lokuð skýrsla. Skýrsluágrip.

    EINKALEYFI

    2002-2007:

    Ævarsson, A., T. Blondal, O.H. Fridjonsson, S. Skirnisdottir, S. Hjörleifsdóttir, G.O. Hreggvidsson & J.K. Kristjansson 2007: Methods of Use for Thermostable RNA Ligases European patent no. 1546355. Evrópskt patent. no. 1546355. Útgefið 21 nóvember 2007.

    Hjorleifsdottir, Sigridur; Hreggvidsson, Gudmundur O.; Fridjonsson, Olafur H.; Aevarsson, Arnthor; Kristjansson,; Jakob K. 2004. RNA ligase of bacteriophage RM 378 US Patent No: 6,818,425. Útgefið 16 Nóv 2004.

    Wicher; KB., Holst; Olof P., Hachem; MYA., Nordberg-Karlsson; EM., Hreggvidsson; GO, Thermostable cellulase. US Patent No 6,812,018. Útgefið 2. Nov. 2004.

    Sigríður Hjörleifsdottir, Gudmundur O. Hreggvidsson, Olafur H. Fridjonsson, Arnthor Aevarsson and Jakob K. Kristjanssson. 2003. Bacteriophage RM 378 of a thermophilic host organism. US Patent No: 6,492,161. Útgefið 10 Des 2002.

    Bókarkaflar / Chapters in reviewed books

    Gudmundur O. Hreggvidsson, Solveig Petursdottir, Snaedis Björnsdottir, Olafur H. Fridjonsson. 2011. Microbial speciation in the geothermal ecosystem. In: Adaption of microbial life to environmental extremes : Novel research results and application. edited by Helga Stan-Lotter, Sergiu Fendrihan. Heidelberg, Springer Verlag.

    Gudmundur O. Hreggvidsson and Jakob K. Kristjansson Thermophily. 2003. Chapter in: Extremophiles– Encylopedia of Life Support Systems: UNESCO

    Jakob K. Kristjansson Gudmundur O. Hreggvidsson and William D. Grant. 2000. Taxonomy of Extremophiles. Chapter in: “Applied Microbial Systematics” (Eds. Fergus G. Priest and Michael Goodfellow). Chapman & Hall, London.

    Ráðstefnur / Proceedings

    2011:

    Varsha Kale, Jón Óskar Jónsson, Ólafur Friðjónsson, Sesselja Ómarsdóttir, Guðundur Ó. Hreggviðsson. Erindi 47: Cloning and expression of a chondroitin lyase gene from the marine bacterium Arthrobacter MAT3885 and characterization of the recombinant enzyme. Líffræðirannsóknir á Íslandi. Ráðstefna Líffræðifélags Íslands, Reykjavík, 11.-12. nóvember 2011.  

    2009:

    Tao Wang, Rósa Jónsdóttir, Hordur G. Kristinsson, Gudjon Þorkelsson, Charlotte Jacobsen, Guðmundur Óli Hreggviðsson and Guðrún Ólafsdóttir. 2009. Algal polyphenols as novel natural antioxidantsrway. Erindi á ráðstefnunni 3rd Joint Trans-Atlantic Fisheries Technology Conference, TAFT 2009. Sept. 15 – 18. Copenhagen, Denmark. Abstract

    2005 – 2007:

    Marc Kochzius, Kristina Kappel, Lutz Döbitz, Nina Silkenbeumer, Manfred Nölte, Hannes Weber, Sigridur Hjörleifsdottir, Viggo Marteinsson, Gudmundur Hreggvidsson, Serge Planes, Fausto Tinti, Antonios Magoulas, Eva Garcia Vazquez, Cemal Turan, Linda Medlin, Katja Metfies, Christine Gescher, Alessia Cariani, Monica Landi, Caroline Hervet, Daniel Campo     Falgueras, Aglaia Antoniou, Fabio Bertasi, Chitipothu Srujana, Dietmar Blohm.  2007. The “Fish & Chips” project: Microarrays as a tool for the identification of marine organisms in biodiversity and ecosystem research.  Oceans ’07 conference proceedings.

    Emma Eyþórsdóttir, Sigurður Þór Guðmundsson og Sigvaldi Jónsson, Sigríður Hjörleifsdóttir og Guðmundur Óli Hreggviðsson. 2005.  Arfgerðir príongens (PrP) í fjárhjörðinni á Hesti.  Ráðstefnurit Fræðaþings Landbúnaðarins

    Veggspjöld

    P.Hamaguchi, M.Geirsdottir, A. Vrac, H. G. Kristinsson, H. Sveinsdottir, O. H. Fridjonsson, G.O. Hreggvidsson. In-vitro antioxidant and antihypertensive properties of Icelandic sea cucumber (Cucumaria frondosa). IFT Annual meeting and food expo, Chicago, 2010. Poster presentation.

    Tao Wang, Rósa Jónsdóttir, Hordur G. Kristinsson, Guðmundur Óli Hreggviðsson, Jón Óskar Jónsson, Guðrún Ólafsdóttir. 2009. Evaluation of antioxidant activity of enzymatic extracts from the red algae Palmaria palmata. Poster at the IFT annual meeting. Anaheim, CA, June 2009.

    Guðrún Ólafsdóttir, Tao Wang, Rósa Jónsdóttir, Hörður Kristinsson, Guðmundur Óli Hreggviðsson, Guðjón Þorkelsson. Palmaria palmata in food formulations as natural antioxidant and functional ingredient. Poster at the Innovation in the Nordic Marine Sector, Reykjavik, May 12th 2009.

    2008:

    E. Reynisson, H.L. Lauzon, H. Magnússon, G.Ó. Hreggvidsson, V.T. Marteinsson. 2008.Rapid quantification of the specific spoilage organism Pseudomonas spp in fish using real-time PCR. Veggspjald á Cold Chain Management ráðstefnu, 3rd International Workshop í Bonn, 2.-3. júní 2008