Structural and functional characterization of Staphylococcus aureus dihydrodipicolinate synthase |
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Authors: | Girish Tavarekere S Sharma Eshita Gopal B |
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Institution: | Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India. |
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Abstract: | Lysine biosynthesis is crucial for cell-wall formation in bacteria. Enzymes involved in lysine biosynthesis are thus potential targets for anti-microbial therapeutics. Dihydrodipicolinate synthase (DHDPS) catalyzes the first step of this pathway. Unlike its homologues, Staphylococcus aureus DHDPS is a dimer both in solution and in the crystal and is not feedback inhibited by lysine. The crystal structure of S. aureus DHDPS in the free and substrate bound forms provides a structural rationale for its catalytic mechanism. The structure also reveals unique conformational features of the S. aureus enzyme that could be crucial for the design of specific non-competitive inhibitors. |
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Keywords: | Dihidrodipicolinate synthase Lysine biosynthesis Feedback inhibition Ping-pong mechanism |
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