Results 51 to 60 of about 876 (161)

Data_Sheet_1_Genetic Elucidation of Quorum Sensing and Cobamide Biosynthesis in Divergent Bacterial-Fungal Associations Across the Soil-Mangrove Root Interface.pdf

open access: yes, 2021
Plant roots in soil host a repertoire of bacteria and fungi, whose ecological interactions could improve their functions and plant performance. However, the potential microbial interactions and underlying mechanisms remain largely unknown across the soil-
Wei Zhuang (146641)   +9 more
core   +1 more source

Biological Activity of Pseudovitamin B12 on Cobalamin-Dependent Methylmalonyl-CoA Mutase and Methionine Synthase in Mammalian Cultured COS-7 Cells

open access: yesMolecules, 2020
Adenyl cobamide (commonly known as pseudovitamin B12) is synthesized by intestinal bacteria or ingested from edible cyanobacteria. The effect of pseudovitamin B12 on the activities of cobalamin-dependent enzymes in mammalian cells has not been studied ...
Tomohiro Bito   +8 more
doaj   +1 more source

A bioassay for the detection of benzimidazoles reveals their presence in a range of environmental samples

open access: yesFrontiers in Microbiology, 2014
Cobamides are a family of enzyme cofactors that include vitamin B12 (cobalamin) and are produced solely by prokaryotes. Structural variability in the lower axial ligand has been observed in cobamides produced by diverse organisms. Of the three classes of
Terence S Crofts   +3 more
doaj   +1 more source

Cobalt Resistance via Detoxification and Mineralization in the Iron-Reducing Bacterium Geobacter sulfurreducens

open access: yesFrontiers in Microbiology, 2020
Bacteria in the genus Geobacter thrive in iron- and manganese-rich environments where the divalent cobalt cation (CoII) accumulates to potentially toxic concentrations.
Hunter Dulay   +3 more
doaj   +1 more source

Nonnative Thiol and Aniline Methylation, Including Enantioselective Dithiol Desymmetrization, by Multicomponent Cobamide‐Dependent Methyltransferases Using Unactivated Methyl Donors

open access: yesAngewandte Chemie International Edition, EarlyView.
Mixed MtaABC/MtgABC methyltransferase systems were developed for non‐native thiol and aniline methylation using the unactivated methyl donors methanol and glycine betaine. The platform enabled site‐selective and enantioselective methylation with turnover number up to 6000, representing the first enantioselective non‐native catalysis by cobamide ...
Amardeep Kumar   +3 more
wiley   +1 more source

Cobamide and cobamide precursor cross-feeding: a genomic perspective [PDF]

open access: yes, 2019
Many bacteria cannot synthesize all the nutrients they require. One type of nutrient that many bacteria must acquire from their environment is cobamides, a class of cofactors including vitamin B12 and related analogs.
Shelton, Amanda Nicole
core  

Deciphering the metabolic interactions between mucus associated Ruminococcus gnavus and Limosilactobacillus reuteri strains [PDF]

open access: yes
Cross-feeding between gut microbiota members is crucial for maintaining gut homeostasis. Cobamides, the vitamin B12 family of enzyme cofactors, are synthesised by approximately 25% of gut microbes while 80% rely on cobamides to conduct enzymatic ...
Reynolds, Raven Sinèad
core   +4 more sources

Redox Conditions Determine Microbial Cobamide Production in Hyporheic Sediment [PDF]

open access: yes, 2019
All kingdoms of life rely on cobalamin, a coenzyme produced by a subset of Bacteria and Archaea. Cobalamin belongs to a family of molecules called cobamides.
Seus, Laurel
core  

Bridging Liquid and Gas Phase Catalysis for Abiotic CO2 Conversion to Prebiotic Organics Over Mesoporous Silica‐Supported Ni–Co Catalysts

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 11, 3 June 2026.
Under simulated hydrothermal vent conditions, Ni⋅Co bimetallic catalysts supported on silica convert CO2 and H2O into key metabolites such as formate, methanol, and ethanol. Water plays a critical role in CO2 adsorption and product selectivity, shaping catalytic performance across both liquid and gas phases.
Yingrui Zhao   +5 more
wiley   +1 more source

Naturally occurring cobalamin (B12) analogs can function as cofactors for human methylmalonyl-CoA mutase [PDF]

open access: yes, 2021
Cobalamin, commonly known as vitamin B12, is an essential micronutrient for humans because of its role as an enzyme cofactor. Cobalamin is one of over a dozen structurally related compounds - cobamides - that are found in certain foods and are produced ...
Plessl, Tanja   +7 more
core   +1 more source

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