Results 51 to 60 of about 13,977 (211)

Hydroxyurea-Mediated Cytotoxicity Without Inhibition of Ribonucleotide Reductase

Cell Reports, 2016
In many organisms, hydroxyurea (HU) inhibits class I ribonucleotide reductase, leading to lowered cellular pools of deoxyribonucleoside triphosphates. The reduced levels for DNA precursors is believed to cause replication fork stalling. Upon treatment of
Li Phing Liew, Zun Yi Lim, Matan Cohen, Ziqing Kong, Lisette Marjavaara, Andrei Chabes, Stephen D. Bell   +6 more
doaj   +1 more source

Coupling transcriptional activation of CRISPR–Cas system and DNA repair genes by Csa3a in Sulfolobus islandicus

Nucleic Acids Research, 2017
CRISPR–Cas system provides the adaptive immunity against invading genetic elements in prokaryotes. Recently, we demonstrated that Csa3a regulator mediates spacer acquisition in Sulfolobus islandicus by activating the expression of Type I-A adaptation cas
Tao Liu, Zhenzhen Liu, Qing Ye, Saifu Pan, Xiaodi Wang, Yingjun Li, Wenfang Peng, Yunxiang Liang, Q. She, Nan Peng   +9 more
semanticscholar   +1 more source

Bio-oxidation of H2S by Sulfolobus metallicus

Biotechnology Letters, 2011
Sulfolobus metallicus is a hyperthermophilic and chemolithoautotrophic archaeon that uses elemental sulfur as an energy source. Its ability to oxidize H(2)S was measured either in the presence or absence of elemental sulphur, showing its ability for using both as an energy source. A biotrickling filter was set up and a biofilm of S.
Morales, Marjorie, Arancibia, Jonathan, Lemus, Mariana, Silva, Javier, Gentina, Juan Carlos, Aroca, German   +5 more
openaire   +4 more sources

S‐Adenosylmethionine (SAM) hydrolases counter increased SAM epimerisation in thermophilic archaea

The FEBS Journal, EarlyView.
S‐Adenosyl‐l‐methionine (SAM) is a vital enzyme cofactor. Epimerisation at the sulfonium centre of biologically active (SS,SCα)‐SAM is driven by heat, yielding biologically inactive (RS,SCα)‐SAM. Here, two novel archaeal SAM hydrolases from the thermophilic Sulfolobus acidocaldarius and the halophilic Haloferax volcanii are shown to cleave (RS,SCα)‐SAM.
Agnes Bartels, Michael K. F. Mohr, Phillip Nußbaum, Marie Joest, Bianca Wassmer, Laurent Rasquin, Sonja‐Verena Albers, Jennifer N. Andexer   +7 more
wiley   +1 more source

Structural basis of RNA polymerase inhibition by viral and host factors

Nature Communications, 2021
Understanding the structural basis for the inhibition of archaeal eukaryotic-like RNA polymerases (RNAPs) during virus infection is of interest for drug design.
Simona Pilotto, Thomas Fouqueau, Natalya Lukoyanova, Carol Sheppard, Soizick Lucas-Staat, Luis Miguel Díaz-Santín, Dorota Matelska, David Prangishvili, Alan C. M. Cheung, Finn Werner   +9 more
doaj   +1 more source

Interplay of Various Evolutionary Modes in Genome Diversification and Adaptive Evolution of the Family Sulfolobaceae

Frontiers in Microbiology, 2021
Sulfolobaceae family, comprising diverse thermoacidophilic and aerobic sulfur-metabolizing Archaea from various geographical locations, offers an ideal opportunity to infer the evolutionary dynamics across the members of this family.
Rachana Banerjee, Narendrakumar M. Chaudhari, Abhishake Lahiri, Abhishake Lahiri, Anupam Gautam, Anupam Gautam, Debaleena Bhowmik, Debaleena Bhowmik, Chitra Dutta, Sujay Chattopadhyay, Daniel H. Huson, Daniel H. Huson, Sandip Paul, Sandip Paul   +13 more
doaj   +1 more source

Extending Cofactor‐Tethered Nanomachines to Complex Multienzyme Redox Cascades in Continuous Flow

ChemSusChem, Volume 19, Issue 15, 14 August 2026.
Engineered enzyme fusions bearing covalently tethered PEG–nicotinamide cofactors enable intramolecular cofactor retention and recycling within self‐sufficient biocatalytic nanomachines. These nanomachines support cofactor‐autonomous operation of complex redox multienzyme cascades under continuous‐flow conditions, as demonstrated in a 10‐step glucose‐to‐
Zinnia Dsouza, Jan‐Simon Jeshua Friedrichs, Okke Melse, Gerhard Schenk, Volker Sieber   +4 more
wiley   +1 more source

The DNA Methylome of the Hyperthermoacidophilic Crenarchaeon Sulfolobus acidocaldarius

Frontiers in Microbiology, 2018
DNA methylation is the most common epigenetic modification observed in the genomic DNA (gDNA) of prokaryotes and eukaryotes. Methylated nucleobases, N6-methyl-adenine (m6A), N4-methyl-cytosine (m4C), and 5-methyl-cytosine (m5C), detected on gDNA ...
Mohea Couturier, A. Lindås
semanticscholar   +1 more source

The X‐Ray Crystal Structure of BorF, the Flavin Reductase Subunit of a Two‐Component Flavin‐Dependent Tryptophan Halogenase

Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 8, Page 1529-1540, August 2026.
ABSTRACT BorF is a short‐chain flavin reductase from a desert soil bacterium that uses NADH to reduce FAD to FADH2, which is used by the tryptophan‐6‐halogenase BorH to chlorinate tryptophan in the biosynthetic pathway of borregomycin A. The X‐ray crystal structure of BorF bound to FAD was solved to 2.37 Å by molecular replacement.
Zheng Ma, Emily W. Rady, Aravinda J. de Silva, John J. Bellizzi III   +3 more
wiley   +1 more source

Sulfurisphaera javensis sp. nov., a hyperthermophilic and acidophilic archaeon isolated from Indonesian hot spring, and reclassification of Sulfolobus tokodaii Suzuki et al. 2002 as Sulfurisphaera tokodaii comb. nov.

International Journal of Systematic and Evolutionary Microbiology, 2018
A novel hyperthermophilic, acidophilic and facultatively anaerobic archaeon, strain KD-1T, was isolated from an acidic hot spring in Indonesia and characterized with the phylogenetically related species Sulfurisphaera ohwakuensis Kurosawa et al.
K. Tsuboi, H. Sakai, Naswandi Nur, K. Stedman, N. Kurosawa, A. Suwanto   +5 more
semanticscholar   +1 more source