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Guðmundur Óli Hreggviðsson - Prófessor

Guðmundur Óli Hreggviðsson

–

Verkfræði- og náttúruvísindasvið

Guðmundur Óli Hreggviðsson

Prófessor

Örveruvistfræði og líftækni

Aðsetur
Askja / N-342
Sími
4225047
Tölvupóstur
gudmundo [hjá] hi.is

Starfseining
Líf- og umhverfisvísindadeild
Vefsíða
http://www.matis.is

ORCID vefsíða
https://orcid.org/0000-0002-4958-1673
Rannsóknagátt – Guðmundur Óli Hreggviðsson

Útgefið efni

2024

Biorefining of Brown Seaweeds Catalyzed through Innovative Enzyme ProcessesIndustrial Biotechnology
Exploring a novel β-1,3-glucanosyltransglycosylase, MlGH17B, from a marine Muricauda lutaonensis strain for modification of laminari-oligosaccharidesGlycobiology
A novel glycoside hydrolase 43-like enzyme from Clostridium boliviensis is an endo-xylanase and a candidate for xylooligosaccharide production from different xylan substratesApplied and Environmental Microbiology
Cloning and Characterization of a Novel N-Acetyl-D-galactosamine-4-O-sulfate Sulfatase, SulA1, from a Marine Arthrobacter StrainMarine Drugs

2023

Fermentation of the Brown Seaweed Alaria esculenta by a Lactic Acid Bacteria Consortium Able to Utilize Mannitol and Laminari-OligosaccharidesFermentation
Metabolic engineering of Thermoanaerobacterium AK17 for increased ethanol production in seaweed hydrolysateBiotechnology for Biofuels and Bioproducts
Evaluation of Laminaria Digitata Hydrolysate for the Production of Bioethanol and Butanol by FermentationFermentation
Geothermal Habitats and Adaptations of Thermophilic Microbes
Correction: Medium development and production of carotenoids and exopolysaccharides by the extremophile Rhodothermus marinus DSM16675 in glucose-based defined mediaMicrobial Cell Factories

2022

Crystal structure and initial characterization of a novel archaeal-like Holliday junction-resolving enzyme from Thermus thermophilus phage Tth15-6Acta Crystallographica Section D: Structural Biology
Molecular Characterization of a DNA Polymerase from Thermus thermophilus MAT72 Phage vB_Tt72International Journal of Molecular Sciences
Enzymatic depolymerization of alginate by two novel thermostable alginate lyases from Rhodothermus marinusFrontiers in Plant Science
Crystal structure of DNA polymerase I from Thermus phage G20cActa Crystallographica
Production of acetone, butanol, and ethanol by fermentation of Saccharina latissima: Cultivation, enzymatic hydrolysis, inhibitor removal, and fermentationAlgal Research
Medium development and production of carotenoids and exopolysaccharides by the extremophile Rhodothermus marinus DSM16675 in glucose-based defined mediaMicrobial Cell Factories

2021

Going to extremes - A metagenomic journey into the dark matter of lifeFEMS Microbiology Letters
Efficient genome editing of an extreme thermophile, Thermus thermophilus, using a thermostable Cas9 variantScientific Reports
Rhodocaloribacter litoris gen. nov., sp. nov., isolated from an intertidal hot springInternational Journal of Systematic and Evolutionary Microbiology
Modeled 3d-structures of proteobacterial transglycosylases from glycoside hydrolase family 17 give insight in ligand interactions explaining differences in transglycosylation productsApplied Sciences (Switzerland)

2020

Engineering the carotenoid biosynthetic pathway in Rhodothermus marinus for lycopene productionMetabolic Engineering Communications
Physiological plasticity of high-temperature intertidal cyanobacterial microbial mats to temperature and salinity: daily and seasonal in situ photosynthetic performanceEuropean Journal of Phycology
Taxogenomic assessment and genomic characterisation of Weissella cibaria strain 92 able to metabolise oligosaccharides derived from dietary fibresScientific Reports
Biocatalytic refining of polysaccharides from brown seaweeds
Opportunities for Seaweed Biorefinery
Metabolic engineering of thermophilic bacteria for production of biotechnologically interesting compounds
Engineering the carotenoid biosynthetic pathway in Rhodothermus marinus for lycopene productionMetabolic Engineering Communications
Extraction and Modification of Macroalgal Polysaccharides for Current and Next-Generation ApplicationsMolecules
Composition analysis and minimal treatments to solubilize polysaccharides from the brown seaweed Laminaria digitata for microbial growth of thermophilesJournal of Applied Phycology
Characterization and diversity of the complete set of GH family 3 enzymes from Rhodothermus marinus DSM 4253Scientific Reports

2019

Cultivation technology development of Rhodothermus marinus DSM 16675Extremophiles

2018

Palmaria palmata as an alternative protein sourceJournal of Applied Phycology
SeaBioTech: From Seabed to Test-Bed: Harvesting the Potential of Marine Biodiversity for Industrial Biotechnology

2017

Divergence of species in the geothermal environment
Bioactive effect of sulphated polysaccharides derived from orange-footed sea cucumber (Cucumaria frondosa) toward THP-1 macrophagesBioactive Carbohydrates and Dietary Fibre
Evaluation of the production of exopolysaccharides by two strains of the thermophilic bacterium Rhodothermus marinusCarbohydrate Polymers
Large-scale production of a thermostable Rhodothermus marinus cellulase by heterologous secretion from Streptomyces lividansMicrobial Cell Factories
Biorefinery approach to the use of macroalgae as feedstock for biofuels
MEGGASENSE - The Metagenome/Genome Annotated Sequence Natural Language Search Engine: A Platform for the Construction of Sequence Data WarehousesFood Technology and Biotechnology

2016

Using molecular networking for microbial secondary metabolite bioprospectingMetabolites
Quantifying mixing, boiling, degassing, oxidation and reactivity of thermal waters at Vonarskard, IcelandJournal of Volcanology and Geothermal Research
Modification of linear (β1→3)-linked glucooligosaccharides with a novel recombinant β-glucosyltransferase (trans-β-glucosidase) enzyme from Bradyrhizobium diazoefficiensGlycobiology
Origin of Atlantic salmon (Salmo salar) at sea in Icelandic watersICES Journal of Marine Science

2015

Biochemical characterization and validation of a catalytic site of a highly thermostable Ts2631 endolysin from the Thermus scotoductus phage vB-Tsc2631PLoS ONE
Complete genome sequence of Streptomyces lividans TK24Journal of Biotechnology
A CGTase with high coupling activity using γ-cyclodextrin isolated from a novel strain clustering under the genus CarboxydocellaGlycobiology
Chondroitin Lyase from a Marine Arthrobacter sp. MAT3885 for the Production of Chondroitin Sulfate DisaccharidesMarine Biotechnology

2014

Isolation, growth and genome of the Rhodothermus RM378 thermophilic bacteriophageExtremophiles
Present-day genetic structure of Atlantic salmon (Salmo salar) in Icelandic rivers and ice-cap retreat modelsPLoS ONE
Isothermal DNA amplification by a novel and non-ubiquitous Thermus polymerase ACurrent Biotechnology
Discovery and characterization of RecA protein of thermophilic bacterium Thermus thermophilus MAT72 phage Tt72 that increases specificity of a PCR-based DNA amplificationJournal of Biotechnology
Novel highly thermostable endolysin from Thermus scotoductus MAT2119 bacteriophage Ph2119 with amino acid sequence similarity to eukaryotic peptidoglycan recognition proteinsApplied and Environmental Microbiology

2013

Improved soluble expression of the gene encoding amylolytic enzyme Amo45 by fusion with the mobile-loop-region of co-chaperonin GroES in Escherichia coliBiocatalysis and Biotransformation
Sulphated polysaccharide from the sea cucumber Cucumaria frondosa affect maturation of human dendritic cells and their activation of allogeneic CD4(+) T cells in vitroBioactive Carbohydrates and Dietary Fibre
Litorilinea aerophila gen. nov., sp. nov., an aerobic member of the class Caldilineae, phylum Chloroflexi, isolated from an intertidal hot springInternational Journal of Systematic and Evolutionary Microbiology

2012

Microbial speciation in the geothermal ecosystem
Bacterial succession during curing process of a skate (Dipturus batis) and isolation of novel strainsJournal of Applied Microbiology
Sustainable biofuel

2011

Exploring novel non-Leloir β-glucosyltransferases from proteobacteria for modifying linear (β1→3)-linked gluco-oligosaccharide chainsGlycobiology
A pilot genetic study reveals the absence of spatial genetic structure in Norway lobster (Nephrops norvegicus) on fishing grounds in Icelandic watersICES Journal of Marine Science
ErratumGlycobiology
A retrospective approach to fractionize variation in body mass of Atlantic cod Gadus morhuaJournal of Fish Biology
Generation of targeted deletions in the genome of Rhodothermus marinusApplied and Environmental Microbiology

2010

Identifying fishes through DNA barcodes and microarraysPLoS ONE
Novel set of multiplex assays (SalPrint15) for efficient analysis of 15 microsatellite loci of contemporary samples of the Atlantic salmon (Salmo salar)Molecular Ecology Resources
Permanent genetic resources added to the molecular ecology resources database 1 February 2010-31 March 2010Molecular Ecology Resources
Enzyme-enhanced extraction of antioxidant ingredients from red algae Palmaria palmataLWT - Food Science and Technology
Structure at 1.0 Å resolution of a high-potential iron-sulfur protein involved in the aerobic respiratory chain of Rhodothermus marinusJournal of Biological Inorganic Chemistry
Novel set of multiplex assays (SalPrint15) for efficient analysis of 15 microsatellite loci of contemporary samples of the Atlantic salmon (Salmo salar)Molecular Ecology Resources

2009

Decontamination efficiency of fish bacterial flora from processing surfacesFood Technology and Biotechnology
Bacterial composition and succession during storage of North-Atlantic cod (Gadus morhua) at superchilled temperaturesBMC Microbiology
Characterisation of an extracellular vibriolysin of the fish pathogen Moritella viscosaVeterinary Microbiology
Analysis of the unique geothermal microbial ecosystem of the Blue LagoonFEMS Microbiology Ecology
Thermus islandicus sp. nov., a mixotrophic sulfur-oxidizing bacterium isolated from the Torfajokull geothermal areaInternational Journal of Systematic and Evolutionary Microbiology

2008

Rapid quantitative monitoring method for the fish spoilage bacteria PseudomonasJournal of Environmental Monitoring
Characterization of 18 new microsatellite loci in Atlantic cod (Gadus morhua L.)Molecular Ecology Resources
A novel type of monoheme cytochrome cBiochemistry
Novel Members of Glycoside Hydrolase Family 13 Derived from Environmental DNAApplied and Environmental Microbiology
DNA microarrays for identifying fishesMarine Biotechnology

2007

The "fish & chips" project
The alternative complex III from Rhodothermus marinus - A prototype of a new family of quinol:electron acceptor oxidoreductasesFEBS Letters
A ba₃ oxygen reductase from the thermohalophilic bacterium Rhodothermus marinusFEMS Microbiology Letters
A highly thermostable trehalase from the thermophilic bacterium Rhodothermus marinusExtremophiles
Immobilization of a recombinant Escherichia coli producing a thermostable α-l-rhamnosidaseEnzyme and Microbial Technology

2006

Rhodothermus marinusExtremophiles
Polyphasic analysis of Thermus isolates from geothermal areas in IcelandExtremophiles
Arfgerðir príongens (PrP) í fjárhjörðinni á Hesti
Nine new polymorphic microsatellite loci for the amplification of archived otolith DNA of Atlantic cod, Gadus morhua L.Molecular Ecology Notes

2005

Two novel cyclodextrin-degrading enzymes isolated from thermophilic bacteria have similar domain structures but differ in oligomeric state and activity profileJournal of Bioscience and Bioengineering
Isolation and characterization of a thermostable RNA ligase 1 from a Thermus scotoductus bacteriophage TS2126 with good single-stranded DNA ligation propertiesNucleic Acids Research
Characterization of a 5′-polynucleotide kinase/3′-phosphatase from bacteriophage RM378Journal of Biological Chemistry
Investigation of the microbial ecology of intertidal hot springs by using diversity analysis of 16S rRNA and chitinase genesApplied and Environmental Microbiology
Cloning, expression, and characterization of a highly thermostable family 18 chitinase from Rhodothermus marinusExtremophiles
A nhaD Na⁺/H⁺ antiporter and a pcd homologues are among the Rhodothermus marinus complex I genesBiochimica et Biophysica Acta - Bioenergetics

2004

A new thermostable α-L-arabinofuranosidase from a novel thermophilic bacteriumBiotechnology Letters
Use of low nutrient enrichments to access novel amylase genes in silent diversity of thermophilesWorld Journal of Microbiology and Biotechnology
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 BacteroidetesFEMS Microbiology Letters
Two new thermostable α-L-rhamnosidases from a novel thermophilic bacteriumEnzyme and Microbial Technology

2003

Thermophily
The modular organisation and stability of a thermostable family 10 xylanaseBiocatalysis and Biotransformation
Discovery and characterization of a thermostable bacteriophage RNA ligase homologous to T4 RNA ligase 1Nucleic Acids Research

2002

The structure of Rhodothermus marinus Cel12A, a highly thermostable family 12 endoglucanase, at 1.8 Å resolutionJournal of Molecular Biology

2001

Isolation and characterization of a mixotrophic sulfur-oxidizing Thermus scotoductusExtremophiles
Characterization of alanine and malate dehydrogenases from a marine psychrophile strain PA-43Extremophiles
A new ecological adaptation to high sulfide by a Hydrogenobacter sp. growing on sulfur compounds but not on hydrogenMicrobiological Research
Phylogenetic Diversity Analysis of Subterranean Hot Springs in IcelandApplied and Environmental Microbiology
Species composition of cultivated and noncultivated bacteria from short filaments in an icelandic hot spring at 88°CMicrobial Ecology
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 marinusApplied Microbiology and Biotechnology

2000

Taxonomy of Extremeophiles
Genetic diversity analysis of Rhodothermus reflects geographical origin of the isolatesExtremophiles
Influence of sulfide and temperature on species composition and community structure of hot spring microbial matsApplied and Environmental Microbiology

1998

Cloning, sequencing and overexpression of a Rhodothermus marinus gene encoding a thermostable cellulase of glycosyl hydrolase family 12Applied Microbiology and Biotechnology
F- and V-ATPases in the genus Thermus and related speciesSystematic and Applied Microbiology

1997

Continuous cultivation of Hydrogenobacter thermophilus at low partial pressures of H₂Biotechnology Techniques

1996

An extremely thermostable cellulase from the thermophilic eubacterium Rhodothermus marinusApplied and Environmental Microbiology

1995

Large scale cultivation of Hydrogenobacter thermophilus on hydrogenLetters in Applied Microbiology
Ecology and habitats of extremophilesWorld Journal of Microbiology & Biotechnology

1994

Cloning and Sequencing of a Rhodothermus marinus Gene, bglA, Coding for a Thermostable β‐Glucanase and its Expression in Escherichia coliEuropean Journal of Biochemistry

1991

Two structurally different cytochromes c from Bacillus azotoformansBBA - Bioenergetics

1986

Isolation of halotolerant Thermus spp. from submarine hot springs in IcelandApplied and Environmental Microbiology

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