Results 211 to 220 of about 3,260 (236)

Cobalamin- and Corrinoid-Dependent Enzymes

2009
This chapter reviews the literature on cobalamin- and corrinoid-containing enzymes. These enzymes fall into two broad classes, those using methylcobalamin or related methylcorrinoids as prosthetic groups and catalyzing methyl transfer reactions, and those using adenosylcobalamin as the prosthetic group and catalyzing the generation of substrate ...
openaire   +3 more sources

Spectroscopic and computational studies of Co3+-corrinoids: spectral and electronic properties of the B12 cofactors and biologically relevant precursors.

Journal of the American Chemical Society, 2003
The B(12) cofactors methylcobalamin (MeCbl) and 5'-deoxyadenosylcobalamin (AdoCbl) have long fascinated chemists because of their complex structures and unusual reactivities in biological systems; however, their electronic absorption (Abs) spectra have ...
T. A. Stich, Amanda J Brooks, Nicole R. Buan, T. Brunold   +3 more
semanticscholar   +1 more source

A cobalt-free corrinoid compound in Streptomyces olivaceus

Biochemical and Biophysical Research Communications, 1970
Abstract An unknown orange-red pigment was obtained from the cells of Streptomyces olivaceus 605 grown on a cobalt-free medium. This compound showed similar behaviors to those of the cobalt-free corrinoids of Chromatium isolated by Toohey in UV, CD and fluorescence spectra.
Shoichi Shimizu, Saburo Fukui, Kazuyoshi Sato   +2 more
openaire   +3 more sources

Spectroscopic and computational studies of Co2+corrinoids: spectral and electronic properties of the biologically relevant base-on and base-off forms of Co2+cobalamin.

Journal of the American Chemical Society, 2004
Co(2+)cobalmain (Co(2+)Cbl) is implicated in the catalytic cycles of all adenosylcobalamin (AdoCbl)-dependent enzymes, as in each case catalysis is initiated through homolytic cleavage of the cofactor's Co-C bond.
T. A. Stich, Nicole R. Buan, T. Brunold
semanticscholar   +1 more source

Effect of bovine serum albumin on the water solubility of hydrophobic corrinoids

Journal of Porphyrins and Phthalocyanines, 2023
I. A. Dereven’kov, Ilya I. Dzvinkas, V. S. Osokin, S. Makarov   +3 more
semanticscholar   +1 more source

An immunological study of corrinoid proteins from bacteria revealed homologous antigenic determinants of a soluble corrinoid-dependent methyltransferase and corrinoid-containing membrane proteins from Methanobacterium species

Archives of Microbiology, 1990
The hypothesis of common epitopes in corrinoid-dependent enzymes was tested by a monospecific polyclonal antiserum against the 33 kDa corrinoid-containing membrane protein from Methanobacterium thermoautotrophicum Marburg. Cross-reaction was detected with the 33 kDa and the 31 kDa subunits of the corrinoid-containing enriched 5-methyl-H4MPT: 5 ...
Stupperich, Erhard, Juza, Andreas, Eckerskorn, Christoph, Edelmann, Lillian   +3 more
openaire   +2 more sources

Validation of semiempirical methods for modeling of corrinoid systems

Journal of Inorganic Biochemistry, 2004
Several semiempirical methods (MNDO-d, PM3tm, PM3-d, PM5, PM6, and AM1-d) have been tested against experimental data and density functional theory (DFT) results in search for the best methods that can be used for quantum-mechanical-molecular mechanics (QM/MM) modeling of corrinoid systems of vitamin B(12) co-factor.
Renata A. Kwiecień, Michal Rostkowski, Piotr Paneth, Agnieszka Dybala-Defratyka   +3 more
openaire   +3 more sources

Abiotic reductive deiodination of iodinated organic compounds and X-ray contrast media catalyzed by free corrinoids.

Chemosphere, 2019
Fatima El-Athman, L. Adrian, M. Jekel, A. Putschew   +3 more
semanticscholar   +1 more source

Co - C-corrinoids — Derivatives of pseudo forms of vitamin B12 — As inhibitors of corrinoid enzymes [PDF]

Pharmaceutical Chemistry Journal, 1982
A. M. Yurkevich, V. S. Fomina, M. I. Yakusheva, E. V. Belozerova, A. A. Poznanskaya, I. P. Rudakova, T. A. Pospelova   +6 more
openaire   +1 more source

Use of 13C and 1H NMR to determine the structure of the diastereomeric cobalt corrinoids aquacyanocobinamide and aquacyanocobester

, 2019
S. M. Chemaly
semanticscholar   +1 more source