S-acylated residues of the acyl-carrier protein subunit of citrate lyase |
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Authors: | Ameresh Basu Subhalakshmi Subramanian Leena S Hiremath Churya SivaRaman |
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Institution: | Biochemistry Division, National Chemical Laboratory, Poona 411008 India |
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Abstract: | Oxidation of the isolated deacetyl acyl-carrier protein subunit of citrate lyase from with Cu2+--phenanthroline complex leads exclusively to intrapeptide disulfide bridge formation indicating that the cysteamine and the cysteine residues are located in close proximity. The S-acetylation of the cysteine residue in deacetyl acyl-carrier protein subunit is catalysed by a citrate lyase ligase preparation in presence of acetate and ATP. Reaction-inactivation of citrate lyase results in deacetylation of the S-acetyl cysteamine residue of the prosthetic group but not of the S-acylated cysteine residue in the acyl-carrier protein. |
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