Results 11 to 20 of about 10,038 (209)

QueF-Like, a Non-Homologous Archaeosine Synthase from the Crenarchaeota [PDF]

Biomolecules, 2017
Archaeosine (G+) is a structurally complex modified nucleoside ubiquitous to the Archaea, where it is found in the D-loop of virtually all archaeal transfer RNA (tRNA).
Adriana Bon Ramos, Lide Bao, Ben Turner, Valérie de Crécy-Lagard, Dirk Iwata-Reuyl   +4 more
doaj   +4 more sources

New insights on the mechanism of the K(+-) independent activity of crenarchaeota pyruvate kinases.

PLoS ONE, 2015
Eukarya pyruvate kinases have glutamate at position 117 (numbered according to the rabbit muscle enzyme), whereas in Bacteria have either glutamate or lysine and in Archaea have other residues.
Gustavo De la Vega-Ruíz, Lenin Domínguez-Ramírez, Héctor Riveros-Rosas, Carlos Guerrero-Mendiola, Alfredo Torres-Larios, Gloria Hernández-Alcántara, José J García-Trejo, Leticia Ramírez-Silva   +7 more
doaj   +4 more sources

Differences in Prokaryotic Community Composition Between Two Climatically Contrasting Years in an Arctic Fjord Ecosystem. [PDF]

Environ Microbiol Rep
Seasonal dynamics of prokaryotic communities in Kongsfjorden were driven by contrasting hydrographic conditions in 2019 and 2020. Atlantification enhanced prokaryotic diversity and interactions in 2019, while sea ice and glacial runoff in 2020 reduced surface diversity and network complexity, underscoring Arctic prokaryotic sensitivity to environmental
Lopes E, Semedo M, Bailey A, Assmy P, Magalhães C.   +4 more
europepmc   +2 more sources

Soil Microbiome of Tropical Seasonal and Permanent Small Wetlands. [PDF]

Environ Microbiol Rep
Distinct hydrological regimes shape microbial communities and metabolic pathways in tropical wetlands. Redox‐driven shifts highlight enhanced methanogenesis under anoxia, and dominant archaeal and bacterial groups reflect specific redox conditions and adaptations, with important implications for biogeochemical cycling and climate‐relevant processes ...
Luko-Sulato K, Sulato ET, Osman JR, Nolasco-Jiménez P, Morales D, Rezende GS, Rodrigues CA, Maintinguer SI, da Cunha AF, Rosolen V.   +9 more
europepmc   +2 more sources

Diversity of Archaeosine Synthesis in Crenarchaeota [PDF]

ACS Chemical Biology, 2011
Archaeosine (G(+)) is found at position 15 of many archaeal tRNAs. In Euryarchaeota, the G(+) precursor, 7-cyano-7-deazaguanine (preQ(0)), is inserted into tRNA by tRNA-guanine transglycosylase (arcTGT) before conversion into G(+) by ARChaeosine Synthase (ArcS). However, many Crenarchaeota known to harbor G(+) lack ArcS homologues.
Phillips, Gabriela, Swairjo, Manal A., Gaston, Kirk W., Bailly, Marc, Limbach, Patrick A., Iwata-Reuyl, Dirk, de Crécy-Lagard, Valérie   +6 more
openaire   +3 more sources

Detection of Euryarchaeota and Crenarchaeota in an oxic basalt aquifer [PDF]

FEMS Microbiology Ecology, 2003
Groundwater from an oxic, fractured basalt aquifer was examined for the presence of Archaea. DNA was extracted from cells concentrated from groundwater collected from five wells penetrating the eastern Snake River Plain Aquifer (Idaho, USA). Polymerase chain reaction (PCR) amplification of 16S rDNA was performed with Archaea-specific primers using both
Seán P, O'Connell, R Michael, Lehman, Oona, Snoeyenbos-West, Vern D, Winston, David E, Cummings, Mary E, Watwood, Frederick S, Colwell   +6 more
openaire   +3 more sources

Hot and sweet: protein glycosylation in Crenarchaeota [PDF]

Biochemical Society Transactions, 2013
Every living cell is covered with a dense and complex array of covalently attached sugars or sugar chains. The majority of these glycans are linked to proteins via the so-called glycosylation process. Protein glycosylation is found in all three domains of life: Eukarya, Bacteria and Archaea.
Meyer, Benjamin H., Albers, Sonja Verena
openaire   +5 more sources

Crenarchaeota and Euryarchaeota in temperate estuarine sediments [PDF]

Journal of Applied Microbiology, 2001
Application of molecular techniques to ecological studies has unveiled a wide diversity of micro-organisms in natural communities, previously unknown to microbial ecologists. New lineages of Archaea were retrieved from several non-extreme environments, showing that these micro-organisms are present in a large variety of ecosystems.
C, Abreu, G, Jurgens, P, De Marco, A, Saano, A A, Bordalo   +4 more
openaire   +2 more sources

An uncultivated crenarchaeota contains functional bacteriochlorophyll a synthase [PDF]

The ISME Journal, 2008
Abstract A fosmid clone 37F10 containing an archaeal 16S rRNA gene was screened out from a metagenomic library of Pearl River sediment, southern China. Sequence analysis of the 35 kb inserted fragment of 37F10 found that it contains a single 16S rRNA gene belonging to Miscellaneous Crenarchaeotal Group (MCG) and 36 open reading frames ...
Meng, Jun, Wang, Fengping, Wang, Feng, Zheng, Yanping, Peng, Xiaotong, Zhou, Huaiyang, Xiao, Xiang   +6 more
openaire   +3 more sources

Structure and Spatial Heterogeneity of Chemosynthesis-Based Deep-Sea Archaeal and Bacterial Communities in Western South Atlantic. [PDF]

Ecol Evol
We report an extensive investigation of prokaryotic communities from a methane cold‐seep area in the Western South Atlantic Ocean (Southern Brazil) employing a broad sample set, including three distinct geographic areas (A, C and E) across a depth gradient (up to 18 m below the seafloor) related to the sulfate–methane transition zone (SMTZ).
Lopes Simão TL, Felix Ribeiro KA, Dias R, Augustin AH, Rodrigues LF, Miller DJ, Viana AR, Triplett EW, Ketzer JMM, Giongo A, Eizirik E, Medina-Silva R.   +11 more
europepmc   +2 more sources