Identification and functional analysis of Escherichia coli cysteine desulfhydrases.

Appl. Environ. Microbiol.2005 Jul;71(7):4149-52

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In Escherichia coli, three additional proteins having L-cysteine desulfhydrase activity were identified as O-acetylserine sulfhydrylase-A, O-acetylserine sulfhydrylase-B, and MalY protein, in addition to tryptophanase and cystathionine beta-lyase, which have been reported previously. The gene disruption for each protein was significantly effective for overproduction of L-cysteine and L-cystine. Growth phenotype and transcriptional analyses suggest that tryptophanase contributes primarily to L-cysteine degradation.

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Identification and functional analysis of Escherichia coli cysteine desulfhydrases.

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