RITASKRÁ / Publications

RITRÝNDAR GREINAR / Articles in peer-reviewed journals:

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

Haraldur Bjornsson, Viggo T. Marteinsson, Olafur H. Fridjonsson, Dirk Linke, Eva Benediktsdottir. 2011. Isolation and characterization of an antigen from the fish pathogen Moritella viscosa. Journal of Applied Microbiology. 111(1), 17-25. Grein / Article

Jóhanna Arnórsdóttir, Manuela Magnúsdóttir, Ólafur H. Friðjónsson, Magnús M. Kristjánsson. 2011. The effect of deleting a putative salt bridge on the properties of the thermostable subtilisin-like proteinase, Aqualysin I. Protein & Peptide Letter. 18(6), 545-55. Grein / Article

Olafur Fridjonsson, Kristinn Olafsson, Scott Tompsett, Snaedis Bjornsdottir, Sonia Consuegra, David Knox, Carlos Garcia de Leaniz, Steinunn Magnusdottir, Gudbjorg Olafsdottir, Eric Verspoor, Sigridur Hjorleifsdottir. 2011. Detection and mapping of mtDNA SNPs in Atlantic salmon using high throughput DNA sequencing. BMC Genomics. 12:179. 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

Pauline Vannier, Viggo Thor Marteinsson, Olafur Hedinn Fridjonsson, Philippe Oger, Mohamed Jebbar. Complete genome sequence of the hyperthermophilic piezophilic, heterotrophic and carboxydotrophic archaeon Thermococcus barophilus MP. Journal of Bacteriology. Published Online, January 2011. 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

Arnorsdottir, J., Magnusdottir, M., Fridjonsson, O., Kristjansson, M. 2010. The effect of deleting a putative salt bridge on the properties of the    thermostable subtilisin-like proteinase, aqualysin I. FEBS Journal, 277(Suppl. 1), 251. 

2009:
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

2008:

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

2007:

Björnsdóttir, S., Fridjonsson, O.H., Kristjansson, J.K., Eggertsson, G. 2007. Cloning and expression of heterologous genes in Rhodothermus marinus. Extremophiles, 11:283-293. Grein / Article

2005:

Blondal T, Thorisdottir A, Unnsteinsdottir U, Hjorleifsdottir S, Aevarsson A, Ernstsson S, Fridjonsson OH, Skirnisdottir S, Wheat JO, Hermannsdottir AG, Sigurdsson ST, Hreggvidsson GO, Smith AV, 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 Acids Research, 33:135-42.

Blondal T, Hjorleifsdottir S, Aevarsson A, Fridjonsson OH, Skirnisdottir S, Wheat JO, Hermannsdottir AG, Hreggvidsson GO, Smith AV, Kristjansson JK. 2005. Characterization of a 5'-polynucleotide kinase/3'-phosphatase from bacteriophage RM378. Biol Chem. 280:5188-94.

Turner P, Labes A, Fridjonsson OH, Hreggvidson GO, Schönheit P, Kristjansson JK, Holst O, Karlsson EN. 2005. Two novel cyclodextrin-degrading enzymes isolated from thermophilic bacteria have similar domain structures but differ in oligomeric state and activity profile. Journal of Bioscience and Bioengineering, 100 (4)  380-90.

2004:

Birgisson H., Hreggvidsson G.O., Fridjonsson O.H., Mort, A., Kristjansson J.K., Mattiasson B. 2004. Two new thermostable α-L-rhamnosidases from a novel thermophilic bacterium. Enzyme and Microbial Technology. 34:561-571.

Birgisson H, Fridjonsson O, Bahrani-Mougeot FK, Hreggvidsson GO, Kristjansson JK, Mattiasson. 2004. A new thermostable alpha-L-arabinofuranosidase from a novel thermophilic bacterium. B. Biotechnology Letters, 26:1347-51.

2003:

Blondal T, Hjorleifsdottir SH, Fridjonsson O. H., Aevarsson A, Skirnisdottir S, Hermannsdottir AG, Hreggvidsson GO, Smith AV, Kristjansson JK. 2003. Discovery and characterization of a thermostable bacteriophage RNA ligase homologous to T4 RNA ligase 1. Nucleic Acids Research, 317247-54.

Cédric F.V. Hobel, Viggó T. Marteinsson, Sigurbjörg Hauksdóttir, Ólafur H. Fridjónsson, Sigurlaug Skírnisdóttir, Gudmundur Ó. Hreggvidsson, Jakob K. Kristjánsson. 2004. Use of low nutrient enrichments to access novel amylase genes in silent diversity of thermophiles. World Journal of Microbiology and Biotechnology, Volume 20 (8), pp. 801-809

2002:

Fridjonsson O., Watzlawick H., Mattes R. 2002. Thermoadaptation of α-galactosidase AgaB1 in Thermus thermophilus. Journal of Bacteriology, 184(12): 3385-91.

2001:

Fridjonsson O., Mattes R. 2001.Production of recombinant α-galactosidases in Thermus thermophilus. Applied and Environmental Microbiology, 67(9):4192-8.

 2000:

Fridjonsson O., Watzlawick H., Mattes R. 2000. The structure of the α-galactosidase gene loci in Thermus brockianus ITI360 and Thermus thermophilus TH125. Extremophiles. 4(1):23-33.

1999:

Fridjonsson O., Watzlawick H., Gehweiler A., Rohrhirsch T., and Mattes R. 1999. Cloning of the gene encoding a novel thermostable α-galactosidase from Thermus brockianus ITI360. Applied and Environmental Microbiology, 65(9):3955-63.

Fridjonsson O., Watzlawick H., Gehweiler A., Mattes R. 1999. Thermostable α-galactosidase from Bacillus stearothermophilus NUB3621: cloning, sequencing and characterization. FEMS Microbiology Letters, 176(1):147-53.

1994:

Magnusson H.B., Fridjonsson O.H, Andresson O.S, Benediktsdottir E., Gudmundsdottir S., Andresdottir V. 1994. Renibacterium salmoninarum, the causative agent of bacterial kidney disease in salmonid fish, detected by nested reverse transcription-PCR of 16S rRNA sequences. Applied and Environmental Microbiology, 60(12):4580-3.

Andresson O.S., Fridjonsson O.H . 1994. The sequence of the single 16S rRNA gene of the thermophilic eubacterium Rhodothermus marinus reveals a distant relationship to the group containing Flexibacter, Bacteroides, and Cytophaga species. Journal of Bacteriology, 176(20):6165-9.

BÓKARKAFLAR BOOK CHAPTERS

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.

CONFERENCE PRESENTATIONS

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. 

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.

SKÝRSLUR / REPORTS

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 / Patents:

Sigríður Hjörleifsdottir, Gudmundur O. Hreggvidsson, Olafur H. Fridjonsson, Arnthor Aevarsson and Jakob K. Kristjansson. Bacteriophage RM 378 of a thermophilic host organisms. US Patent application No. 09/585,959, filed June 2. 1999. Also filed as PCT as well as five divisional US patent applications on genes for RNA ligase, DNA polymerase, DNA helicase, RNase H and 3´-5´exonuclease.

A. Ævarsson, 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

Viggo Th. Marteinsson, Cedric Hobel, Gudmundur O. Hreggvidsson, Jakob K. Kristjansson and Olafur H. Fridjonsson. Accessing microbial diversity by ecological methods. US Patent application 09/770,771, filed Jan. 26. 2001

Arnthor Aevarsson, Viggo Th. Marteinsson, Olafur H. Fridjonsson, Gudmundur O. Hreggvidsson and Jakob K. Kristjansson. Method of obtaining protein diversity. Icelandic Patent application no. 5863 filed Feb. 23. 2001 and US No. 09/878,423 filed June 11. 2001.

Gudmundur O. Hreggvidsson, Olafur H. Fridjonsson, Sigurlaug Skirnisdottir and Jakob K. Kristjansson. Retrieval of genes and gene fragments from complex samples. Icelandic Patent application no. 6372 filed May 3. 2002. US patent application no. 10/200,055 filed July 18. 2002.