Research of Desulfhydrase Involved in L-cysteine Biosynthetic Pathway in Pseudomonas sp.
Microbiology(2006)
Abstract
The L-cysteine desulfhydrase gene (cd) of Pseudomonas sp.TS1138 was amplified by PCR,and the amplified gene was recombined in the cloning vector pBluescript SKII.The 1.2kb DNA fragment containing cd was sequenced,and its homology with other desulfhydrases was blast; then the cd was cloned into the expression vector pET-21a(+), and afterward expressed by IPTG inducement.The expression protein was purified by Ni-NTA His-Bind Resin.Then the expression protein was identified by the method of activity staining of desulfhydrase, and the characterization of L-cysteine desulfhydrase and the critical role it played in the L-cysteine biosynthetic pathway were discussed.
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Key words
desulfhydrase,pseudomonas sp,l-cysteine
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