Results 61 to 70 of about 7,069 (167)

A Proteasome from the Methanogenic Archaeon Methanosarcina thermophila [PDF]

open access: yesJournal of Biological Chemistry, 1995
A 645-kDa proteasome was purified from Methanosarcina thermophila which had chymotrypsin-like and peptidylglutamyl-peptide hydrolase activities and contained alpha (24-kDa) and beta (22-kDa) subunits. Processing of both subunits was suggested by comparison of N-terminal sequences with the sequences deduced from the alpha- and beta-encoding genes (psmA ...
J A, Maupin-Furlow, J G, Ferry
openaire   +2 more sources

H2‐dependent modulation of tetrahydromethanopterin S‐methyltransferase (Mtr complex) activity by the small protein MtrR in Methanosarcina mazei

open access: yesThe FEBS Journal, Volume 293, Issue 14, Page 4397-4410, July 2026.
Small protein MtrR is a regulator of the Mtr methyltransferase complex in Methanosarcina mazei. It binds specifically to the MtrA subunit and modulates Mtr activity in response to hydrogen (H2) availability. Deleting mtrR impairs growth in the presence but not absence of H2, indicating its role in directing methyl transfer toward an energy‐conserving ...
Tim Habenicht   +6 more
wiley   +1 more source

Energy Conservation via Hydrogen Cycling in the Methanogenic Archaeon Methanosarcina barkeri

open access: yesmBio, 2018
Energy conservation via hydrogen cycling, which generates proton motive force by intracellular H2 production coupled to extracellular consumption, has been controversial since it was first proposed in 1981.
Gargi Kulkarni   +2 more
doaj   +1 more source

Resonance Raman analysis of intracellular vitamin B12 analogs in methanogenic archaea

open access: yesAnalytical Science Advances, 2022
Methanogenic archaea (methanogens) are microorganisms that can synthesize methane. They are found in diverse environments ranging from paddy fields to animal digestive tracts to deep‐sea hydrothermal vents.
Nanako Kanno   +4 more
doaj   +1 more source

Enhancement of bioconversion of coal to methane by graphene

open access: yesMeitan xuebao, 2023
The research of enhancing biomethanation of coal has been paid much attention, which is an effective measure for increasing coalbed methane production.
Yixuan ZHOU   +5 more
doaj   +1 more source

Vegetation Increases CH4 Emissions and Methanotroph Diversity in Marine Sediments

open access: yesGlobal Change Biology, Volume 32, Issue 7, July 2026.
Seagrass meadows enhance carbon burial but also increase methane (CH4) emissions from marine sediments. The presence of seagrass modifies sediment properties, creating carbon‐rich environments characterized by higher carbon accumulation and CO2 fluxes, which stimulate CH4 production and lead to higher emissions.
Marion Dolivet‐Maréchal   +17 more
wiley   +1 more source

Changes in concentrations of coenzyme F420 analogs during batch growth of Methanosarcina barkeri and Methanosarcina mazei [PDF]

open access: yesApplied and Environmental Microbiology, 1989
Coenzyme F420 has been assayed by high-performance liquid chromatography with fluorimetric detection; this permits quantification of individual coenzyme F420 analogs whilst avoiding the inclusion of interfering material. The total intracellular coenzyme F420 content of Methanosarcina barkeri MS cultivated on methanol and on H2-CO2 and of Methanosarcina
openaire   +2 more sources

Structure and haem-distal site plasticity in Methanosarcina acetivorans protoglobin. [PDF]

open access: yesPLoS ONE, 2013
Protoglobin from Methanosarcina acetivorans C2A (MaPgb), a strictly anaerobic methanogenic Archaea, is a dimeric haem-protein whose biological role is still unknown.
Alessandra Pesce   +11 more
doaj   +1 more source

Characterization of the cytochromes occurring in Methanosarcina species [PDF]

open access: yesEuropean Journal of Biochemistry, 1983
Several members of the genus Methanosarcina were investigated by room‐temperature and low‐temperature difference spectroscopy for the presence of cytochromes. In combination with potentiometric titrations two membrane‐bound b‐cytochromes and one membrane‐bound c‐cytochrome could be detected in cells grown on methanol or trimethylamine.
W, Kühn, G, Gottschalk
openaire   +2 more sources

Deciphering the properties and reaction mechanism of anhydromevalonate phosphate decarboxylase, a prenylated flavin mononucleotide‐dependent enzyme in the archaeal mevalonate pathway

open access: yesThe FEBS Journal, Volume 293, Issue 11, Page 3303-3319, June 2026.
Characterization of anhydromevalonate phosphate decarboxylase, the UbiD‐family decarboxylase involved in the archaeal mevalonate pathway, was conducted. The enzyme is responsible for the biosynthesis of isoprenoids, such as archaeal membrane lipids, respiratory quinones, and dolichols.
Rino Ishikawa   +9 more
wiley   +1 more source

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