Structural characterization of novel cobalt corrinoids synthesized by enzymes of the vitamin B12 anaerobic pathway
作者:Patricio J. Santander、Yasuhiro Kajiwara、Howard J. Williams、A. Ian Scott
DOI:10.1016/j.bmc.2005.08.062
日期:2006.2
use of the oxidized form (factor 3 (3a)) of the trimethylated intermediate (precorrin 3 (2)) as a substrate for the enzymes of the anaerobic pathway to vitamin B12 led to the synthesis of three pairs of novel cobalt corrinoids. The products were made with the aid of the Salmonella typhimurium enzymes CbiH, CbiF, CbiG, and CbiT, were synthesized in several 13C labeled versions, and were isolated as methylesters
关于使用三甲基化中间体(前corrin 3(2))的氧化形式(因子3(3a))作为维生素B12厌氧途径酶的底物的研究,导致了三对新型钴类corrinoids的合成。产物是用鼠伤寒沙门氏菌酶CbiH,CbiF,CbiG和CbiT制成的,以几种13C标记的形式合成,并在酯化后分离为甲酯。通过详细的NMR和MS分析确定结构。每组产品均以脱羧(RMe)和非脱羧(R = CH2COOCH3)形式(在卟啉类的C-12位)获得。