Results 31 to 40 of about 2,296 (207)

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

Incomplete Wood-Ljungdahl pathway facilitates one-carbon metabolism in organohalide-respiring Dehalococcoides mccartyi. [PDF]

, 2014
The acetyl-CoA "Wood-Ljungdahl" pathway couples the folate-mediated one-carbon (C1) metabolism to either CO2 reduction or acetate oxidation via acetyl-CoA.
Alvarez-Cohen, Lisa, Bill, Markus, Brisson, Vanessa L, Conrad, Mark E, Feng, Xueyang, Men, Yujie, Tang, Yinjie J, Yi, Shan, Zhuang, Wei-Qin   +8 more
core   +1 more source

Mouse transcobalamin has features resembling both human transcobalamin and haptocorrin.

PLoS ONE, 2011
In humans, the cobalamin (Cbl) -binding protein transcobalamin (TC) transports Cbl from the intestine and into all the cells of the body, whereas the glycoprotein haptocorrin (HC), which is present in both blood and exocrine secretions, is able to bind ...
Katrine Hygum, Dorte L Lildballe, Eva H Greibe, Anne L Morkbak, Steen S Poulsen, Boe S Sorensen, Torben E Petersen, Ebba Nexo   +7 more
doaj   +1 more source

Supplementing lactating dairy cows with a vitamin B12 precursor, 5,6-dimethylbenzimidazole, increases the apparent ruminal synthesis of vitamin B12

Animal, 2015
Cobalamin (CBL), the biologically active form of vitamin B12, and its analogs, are produced by bacteria only if cobalt supply is adequate. The analogs differ generally by the nucleotide moiety of the molecule.
A. Brito, J. Chiquette, S.P. Stabler, R.H. Allen, C.L. Girard   +4 more
doaj   +1 more source

Ring contraction of hydroporphinoid to corrinoid complexes [PDF]

Proceedings of the National Academy of Sciences, 1981
Crystalline nickel(II) and dicyanocobalt(III) complexes of a racemic 1,2,2,7,7,12,12,17,17,20-decamethyl-20-hydroxy-1,2,3,7,8,12,13,20-octahydro- 17 H -porphyrin rearrange to the corresponding complexes of racemic 19-acetyl-1,2,2,7,7,12,12,17,17-nonamethyl- trans -corrin on melting ...
Vittorio Rasetti, Andreas Pfaltz, Christoph Kratky, Albert Eschenmoser   +3 more
openalex   +4 more sources

Basal gnathostomes provide unique insights into the evolution of vitamin B12 binders [PDF]

, 2014
© The Author(s), 2014. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Genome Biology and Evolution 7 (2015): 457-464, doi:10.1093/gbe/evu289.The uptake and transport of ...
Aluru, Neelakanteswar, Castro, L. Filipe C., Delgado, Ines, Lopes-Marques, Monica, Ruivo, Raquel, Wilson, Jonathan M.   +5 more
core   +1 more source

Navigating Transition Metal‐Dependent Cell Death: Mechanisms, Crosstalk, and Future Directions

Advanced Science, Volume 12, Issue 46, December 11, 2025.
Transition metals trigger distinct regulated cell death pathways beyond traditional apoptosis. This review examines ferroptosis (iron‐catalyzed lipid peroxidation) and cuproptosis (copper‐induced mitochondrial proteotoxicity), while exploring hypothetical “cobaltosis” as a novel pathway.
Qinghang Song, Yuxuan Yang, Lina Yang
wiley   +1 more source

Cobalamin‐Dependent Aryl Methyl Ether O‐Demethylases: Promising Enzymes for Biocatalytic Applications from Lignin Valorization to Organic Synthesis

ChemCatChem, Volume 17, Issue 21, November 10, 2025.
Cobalamin‐dependent aryl methyl ether O‐demethylases have high potential for biocatalytic applications, including lignin valorization and synthetic chemistry. In this review, we provide a detailed overview of such O‐demethylase systems identified to date from various microorganisms, including their mechanism, substrate scope and selectivity, and ...
Niels Krabbe Johnsen, Santipap Chaiyasarn, Zheng Guo, Jaehong Han, Bekir Engin Eser   +4 more
wiley   +1 more source

Anaerobic Limonene Metabolism in a Methanogenic Enrichment Involves a Glycine Radical Enzyme

Environmental Microbiology, Volume 27, Issue 11, November 2025.
A methanogenic enrichment culture on the natural monoterpene limonene is characterised by a novel glycine radical enzyme for anaerobic hydrocarbon activation, the presence of a microbial loop for necromass utilisation and the presence of a predator of Bacteria and Archaea. ABSTRACT Limonene is a natural monoterpene omnipresent in human environments. It
Almud Lonsing, Gerrit Alexander Martens, Anastasia Resteu, Jana Kizina, Isabella Wilkie, Alexandra Bahr, Jens Harder   +6 more
wiley   +1 more source

Expansion of cagA Copy Number in Helicobacter pylori During Co‐Infection in a Mouse Model

Helicobacter, Volume 30, Issue 6, November/December 2025.
ABSTRACT Introduction The virulence factor CagA is critical in mediating inflammation, and Helicobacter pylori PMSS1 dynamically modulates cagA copy number in response to host immune pressure. Co‐infection with Salmonella enterica serotype Typhimurium has been shown to heighten systemic inflammation and reduce H.
Kavinda Tissera, Ashansa Ramanayake, Myeong‐A Kim, Eui‐Jeong Noh, Sacheera Angulmaduwa, Dowon Seo, Yong‐Joon Cho, Jeong‐Heon Cha   +7 more
wiley   +1 more source