Results 31 to 40 of about 4,841 (133)
The deep biosphere in terrestrial sediments in the Chesapeake Bay area, Virginia, USA
Frontiers in Microbiology, 2011 For the first time quantitative data on the abundance of Bacteria, Archaea and Eukarya in deep terrestrial sediments are provided using multiple methods (total cell counting, quantitative real-time PCR (Q-PCR) and catalyzed reporter deposition ...
Anja eBreuker +3 more
doaj +1 more source
Archaeal Tetraether Lipids as Tracers for Past Marine Environmental Change
Paleoceanography and Paleoclimatology, Volume 41, Issue 7, July 2026.Abstract Archaea are single‐celled microorganisms that are abundant in marine environments and play a key role in the carbon and nitrogen cycles. Archaea can biosynthesize a wide variety of isoprenoid membrane lipids, including isoprenoid glycerol dibiphytanyl glycerol tetraethers (isoGDGTs).
Felix J. Elling +39 more
wiley +1 more source
PLoS ONE, 2013 The deep-sea represents a substantial portion of the biosphere and has a major influence on carbon cycling and global biogeochemistry. Benthic deep-sea prokaryotes have crucial roles in this ecosystem, with their recycling of organic matter from the ...
Donato Giovannelli +5 more
doaj +1 more source
Diving deep into the origins of refractory dissolved amino acids in the ocean
Limnology and Oceanography, Volume 71, Issue 6, June 2026.Abstract Amino acids are key constituents of marine peptides and proteins and are generally considered biologically labile or semi‐labile, yet their widespread occurrence throughout the ocean suggests bioresistance over extended timescales. To investigate this paradox, we conducted two parallel shipboard incubation experiments to track microbial ...
Yuan Shen, Ronald Benner
wiley +1 more source
AgronomyThe black soil region of Northeast China is crucial for agricultural productivity. Ammonia-oxidizing archaea (AOA) are key indicators of soil nitrification in this region, yet it remains unclear whether this process is driven by the entire community or ...
Feng Wang +8 more
doaj +1 more source
Biology Direct, 2009 The transcription machineries of Archaea and eukaryotes are similar in many aspects, but little is understood about archaeal chromatin and its role in transcription.
Kelly Steven +3 more
doaj +1 more source
مجلة مركز بحوث التقنيات الاحيائية, 2023 Background: Metabolic and genomic informatics integrations in organism-specific databases require comprehensive and intensive efforts. PathoLogic, a component of the Pathway Tools software package can create complete Pathway/Genome Databases (PGDBs ...
Barzan Ibrahim Khayatt
doaj +1 more source
Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 6, Page 1245-1258, June 2026.ABSTRACT We present the first x‐ray crystallographic structural evidence of an archaeal DNA ligase showing the AMP covalent adduct together with further cofactor hydrolysis, capturing a transient intermediary in the first step of the ligation reaction, triggered by the pyrophosphate hydrolysis.
A. X. Quintana‐Armas +3 more
wiley +1 more source
Acta Crystallographica Section F, Volume 82, Issue 6, Page 216-221, June 2026.Crystal structures of A. pernix PCNA1 (1.60 Å resolution) and PCNA2 (2.17 Å resolution) are reported. High‐resolution analysis reveals a rare nonproline cis‐peptide bond in PCNA1 that may cause steric hindrance at the subunit interface, suggesting a distorted or symmetry‐broken heterotrimeric PCNA ring.Aeropyrum pernix is a hyperthermophilic archaeon ...
Tong Wang +3 more
wiley +1 more source
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 +7 more
doaj +1 more source