Results 41 to 50 of about 3,260 (236)

Receptor uptake arrays for vitamin B12, siderophores and glycans shape bacterial communities

, 2017
Molecular variants of vitamin B12, siderophores and glycans occur. To take up variant forms, bacteria may express an array of receptors. The gut microbe Bacteroides thetaiotaomicron has three different receptors to take up variants of vitamin B12 and 88 ...
Frank, Steven A.
core   +1 more source

cobA function is required for both de novo cobalamin biosynthesis and assimilation of exogenous corrinoids in Salmonella typhimurium

Journal of Bacteriology, 1990
Salmonella typhimurium is able to synthesize cobalamin (B12) under anaerobic growth conditions. The previously described cobalamin biosynthetic mutations (phenotypic classes CobI, CobII, and CobIII) map in three operons located near the his locus (minute
J. Escalante‐Semerena, S. Suh, J. Roth
semanticscholar   +1 more source

Diversity of corrinoids in acetogenic bacteria. P-cresolylcobamide from Sporomusa ovata, 5-methoxy-6-methylbenzimidazolylcobamide from Clostridium formicoaceticum and vitamin B12 from Acetobacterium woodii.

European Journal of Biochemistry, 1988
The Co beta-cyanocobamides obtained by cyanide extractions from several acetogenic bacteria were structurally characterized by ultraviolet/visible spectra, proton-nuclear-magnetic-resonance spectra and fast-atom-bombardment mass spectra.
E. Stupperich, H. Eisinger, B. Kräutler
semanticscholar   +1 more source

Polyphenol Oxidase Activity on Guaiacyl and Syringyl Lignin Units

Angewandte Chemie, Volume 136, Issue 48, November 25, 2024.
The conversion of lignin‐derived guaiacyl (G) and syringyl (S) compounds into methoxy‐ortho‐diphenols through oxidative ortho‐hydroxylation and ortho‐demethoxylation reactions catalyzed by novel fungal polyphenol oxidases (PPOs) is presented. The formation of o‐diphenols rather than reactive quinones can be steered by the addition of a reductant. These
Caio de O. G. Silva, Peicheng Sun, Kristian Barrett, Mark G. Sanders, Willem J. H. van Berkel, Mirjam A. Kabel, Anne S. Meyer, Jane W. Agger   +7 more
wiley   +2 more sources

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

, 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
Alvarez-Cohen, Lisa, Crofts, Terence S, Men, Yujie, Taga, Michiko E   +3 more
core   +1 more source

Methylobacterium sp. 2A is a plant growth-promoting rhizobacteria that has the potential to improve potato crop yield under adverse conditions [PDF]

, 2020
A Gram-negative pink-pigmented bacillus (named 2A) was isolated from Solanum tuberosum L. cv. Desirée plants that were strikingly more developed, presented increased root hair density, and higher biomass than other potato lines of the same age.
Fantino, Elisa Inés, Fernández Do Porto, Darío Augusto, Grossi, Cecilia Eugenia María, Serral, Federico, Ulloa, Rita Maria, Zawoznik, Myriam Sara   +5 more
core   +1 more source

Pseudovitamin B12 producing Loigolactobacillus coryniformis enhances soy milk fermentation by Lactobacillus delbrueckii subsp. bulgaricus

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Fermenting soy milk with lactic acid bacteria is challenging. Generally, carbohydrates are added to enhance the acid production in soy milk. However, the yoghurt starter Lactobacillus delbrueckii subsp. bulgaricus did not succeed in fermenting soy milk supplemented with carbohydrates.
Harutoshi Tsuda, Kunihisa Iwai, Natsuki Hayashizaki   +2 more
wiley   +1 more source

Lettuce fortification through vitamin B12‐producing bacteria – proof of concept study

Journal of the Science of Food and Agriculture, Volume 105, Issue 6, Page 3343-3354, April 2025.
Abstract BACKGROUND Vitamin B12 (cobalamin) can be produced de novo only by certain bacteria and archaea. It plays a crucial role in the health of animals and humans, which obtain it only through diet, mainly from animal products. This study aimed to identify endophytic bacterial strains capable of synthesizing vitamin B12 and enriching edible plants ...
Sara Pipponzi, Stefanie Primisser, Livio Antonielli, Emilio Stefani, Stephane Compant, Angela Sessitsch, Tanja Kostic   +6 more
wiley   +1 more source

Uneven distribution of cobamide biosynthesis and dependence in bacteria predicted by comparative genomics. [PDF]

, 2019
The vitamin B12 family of cofactors known as cobamides are essential for a variety of microbial metabolisms. We used comparative genomics of 11,000 bacterial species to analyze the extent and distribution of cobamide production and use across bacteria ...
Haft, David R, Han, Andrew W, Jackson, Samantha N, Mok, Kenny C, Seth, Erica C, Shelton, Amanda N, Taga, Michiko E   +6 more
core   +1 more source

Methanol and Carbon Monoxide Metabolism of the Thermophile Moorella caeni

Environmental Microbiology, Volume 27, Issue 4, April 2025.
An omics approach was used to elucidate the C1 metabolism of Moorella caeni DSM 21394 T, which exhibits acetogenic metabolism on methanol and hydrogenogenic metabolism on CO. Our results suggest that respiratory Complex I serves as the primary respiratory enzyme in methanol‐grown cells.
Nicolas A. Vecchini Santaella, Alfons J. M. Stams, Diana Z. Sousa   +2 more
wiley   +1 more source