Results 141 to 150 of about 1,224 (179)
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Cobalt and Corrinoid Transport and Biochemistry
2012In this chapter, we focus on the biochemistry of non-corrin cobalt and on a subset of corrinoid-containing enzymes. We review the import of cobalt in prokaryotes and discuss two members of the non-corrin cobalt-dependent enzymes, nitrile hydratase and methionine aminopeptidase.
Valentin, Cracan, Ruma, Banerjee
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Application of difference spectra of corrinoids to their determination
Analytical Biochemistry, 1969Abstract Marked absorbance differences were observed between the monocyano and dicyano forms at 358 and 370 mμ in the case of complete corrinoids, and at 354 and 368 mμ in the case of incomplete corrinoids. Approximately equal absorbance difference coefficients were derived from the absorbance differences at the respective two wavelengths for the ...
T, Shimizu, H, Narahara, T, Kamikubo
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Corrinoid and thiol dependent threonine decarboxylation
Biochemical and Biophysical Research Communications, 1976Summary A novel system for the decarboxylation of L-threonine requiring the presence of certain aquocorrinoids, preferably diaquocobyric acid, and of a thiol is described. The reaction shows a marked optimum at a pH value of about 8. Other L-amino acids, with the exception of L-serine, are much less reactive. Optical data point to a ligand attachment
S H, Ford, H C, Friedmann
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Cobalamin- and Corrinoid-Dependent Enzymes
2009This 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 ...
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Cobalt-free Corrinoids as Vitamin B12 Antagonists
Nature, 1966Abstract The anti-vitamin B12 properties of four descobalto-corrins isolated from Chromatium cells were compared with vitamin B12-anilide, vitamin B12-monocarboxylic acid, cobinamide, and Friedrich's C′3-2-methyl-2-aminopropanol(1)-vitamin B12 (compound S-102).
D, Perlman, J I, Toohey
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Multiple Functions of Corrinoids in Prokaryote Biology
Applied Biochemistry and Microbiology, 2003Data on more than 30 metabolic processes and biochemical reactions, involving corrinoids, which have been described in prokaryotes thus far, are reviewed. These pathways (central or specific, catabolic or anabolic) are inherent in bacteria and archebacteria of diverse phylogenetic lineages, comprising several physiological groups.
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Zur Struktur rhodiumhaltiger Corrinoide
Liebigs Annalen der Chemie, 1980AbstractDurch Umsetzung von Hydrogenobyrinsäure‐a,c‐diamid (1) mit [Rh(CO)2Cl]2 in Eisessig/Ethanol (1:1; Vol.: Vol.) erhält man als Hauptprodukt Rhodibyrinsäure‐a,c‐diamid 2. Die Identität von 2 wird durch Röntgenstrukturanalyse bestätigt. Veresterung von 2 mit Methanol/Schwefelsäure führt neben Rhodibyrinsäure‐pentamethylester‐a,c‐diamid 3a zu den ...
Bernd Dresow +4 more
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Corrinoid catalysis of thiol oxidation
Inorganica Chimica Acta, 1983Abstract Under appropriate conditions, thiols can react with corrinoids to form relatively stable complexes [1–7], or reduced corrinoids [1, 2, 8–11]. If alkyl halides are present during the reduction of corrinoids by thiols, alkyl corrinoids are produced [4, 9, 12, 13].
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Microbial degradation of corrinoids
Archives of Biochemistry and Biophysics, 1965R.C. Burgus +3 more
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Microbial degradation of corrinoids
Archives of Biochemistry and Biophysics, 1968Sandra Y.S. Ing, J.J. Pfiffner
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