Cobalamin riboswitches are broadly sensitive to corrinoid cofactors to enable an efficient gene regulatory strategy

KJ Kennedy, FJ Widner, OM Sokolovskaya… - MBio, 2022 - Am Soc Microbiol
In bacteria, many essential metabolic processes are controlled by riboswitches, gene
regulatory RNAs that directly bind and detect metabolites. Highly specific effector binding …

[HTML][HTML] The biosynthetic pathway of 2-azahypoxanthine in fairy-ring forming fungus

T Suzuki, N Yamamoto, JH Choi, T Takano, Y Sasaki… - Scientific reports, 2016 - nature.com
Abstract “Fairy rings” resulting from fungus-stimulated plant growth occur all over the world.
In 2010, 2-azahypoxanthine (AHX) from a fungus Lepista sordida was identified as the “fairy” …

Insights into the relationship between cobamide synthase and the cell membrane

VL Jeter, JC Escalante-Semerena - Mbio, 2021 - Am Soc Microbiol
Cobamides are cobalt-containing cyclic tetrapyrroles used by cells from all domains of life
but only produced de novo by some bacteria and archaea. The “late steps” of the …

Regiospecific formation of cobamide isomers is directed by CobT

TS Crofts, AB Hazra, JLA Tran, OM Sokolovskaya… - Biochemistry, 2014 - ACS Publications
Cobamides, which include vitamin B12 (cobalamin), are a class of modified tetrapyrroles
synthesized exclusively by prokaryotes that function as cofactors for diverse biological …

[HTML][HTML] Novel Pathway for Corrinoid Compounds Production in Lactobacillus

AC Torres, V Vannini, G Font, L Saavedra… - Frontiers in …, 2018 - frontiersin.org
Vitamin B12 or cobalamin is an essential metabolite for humans, which makes it an
interesting compound for many research groups that focus in different producer-strains …

A new class of phosphoribosyltransferases involved in cobamide biosynthesis is found in methanogenic archaea and cyanobacteria

VL Jeter, TA Mattes, NR Beattie… - Biochemistry, 2019 - ACS Publications
Cobamides are coenzymes used by cells from all domains of life but made de novo by only
some bacteria and archaea. The last steps of the cobamide biosynthetic pathway activate …

[HTML][HTML] Structural studies of the phosphoribosyltransferase involved in cobamide biosynthesis in methanogenic archaea and cyanobacteria

VL Jeter, AH Schwarzwalder, I Rayment… - Scientific Reports, 2022 - nature.com
Cobamides (Cbas) are coenzymes used by cells across all domains of life, but de novo
synthesis is only found in some bacteria and archaea. Five enzymes assemble the …

[HTML][HTML] The coenzyme B12 precursor 5, 6-dimethylbenzimidazole is a flavin antagonist in Salmonella

L Malalasekara, JC Escalante-Semerena - Microbial Cell, 2023 - ncbi.nlm.nih.gov
Salmonella enterica subsp. enterica sv. Typhimurium str. LT2 (hereafter S. Typhimurium)
synthesizes adenosylcobalamin (AdoCbl, CoB 12) de novo only under anoxic conditions …

Salmonella enterica synthesizes 5,6‐dimethylbenzimidazolyl‐(DMB)‐α‐riboside. Why some Firmicutes do not require the canonical DMB activation system to …

TA Mattes, JC Escalante‐Semerena - Molecular microbiology, 2017 - Wiley Online Library
Dimethylbenzimidazolyl‐(DMB)‐α‐ribotide [α‐ribazole‐5′‐phosphate (α‐RP)] is an
intermediate in the biosynthesis of adenosylcobalamin (AdoCbl) in many prokaryotes. In …

[HTML][HTML] CobT and BzaC catalyze the regiospecific activation and methylation of the 5-hydroxybenzimidazole lower ligand in anaerobic cobamide biosynthesis

Y Mathur, S Sreyas, PM Datar, MB Sathian… - Journal of Biological …, 2020 - ASBMB
Vitamin B 12 and other cobamides are essential cofactors required by many organisms and
are synthesized by a subset of prokaryotes via distinct aerobic and anaerobic routes. The …