Synthesis and biological activity of 9-mercaptodethiobiotin—a putative biotin precursor in Escherichia coli
摘要:
A total synthesis of (+/-)-9-mercaptodethiobiotin 3 via the aldehyde 9 is described. Compound (+/-)-3 does not function as a biotin replacement factor for an E. coli mutant (SA291) lacking the entire biotin synthesis operon (bioABFCD-) but supports growth of an E. coli bioA mutant. Compound (+/-)-3 also supports growth of transformed cells of SA291 carrying a plasmid encoding the E. coli biotin synthase (bioB) gene indicating that the compound may be able to substitute for dethiobiotin 2 as a substrate for biotin synthase.
Biotin biosynthesis: synthesis and biological evaluation of the putative intermediate thiols
作者:Andree Marquet、Francois Frappier、Georges Guillerm、Michel Azoulay、Dominique Florentin、Jean Claude Tabet
DOI:10.1021/ja00059a006
日期:1993.3
biotin biosynthesis, the sulfuur insertion into dethiobiotin should involve a thiol as intermediate. The three possible thiols have been synthesized and their biological activity was evaluated: the primary thiol 10 labeled with [ 35 S] or [ 34 S] or with deuterium was transformed into biotin by resting cells of Bacillus sphaericus without loss of the label. Hence, it is a possible intermediate. Interestingly