Post-translational modification of polyketide and nonribosomal peptide synthases.

The past year has witnessed a major advance in the study of polyketide and nonribosomal peptide biosynthesis with the identification of the phosphopantetheinyl transferase enzyme family, enzymes required to produce active, post-translationally modified polyketide and peptide synthases. Phosphopantetheinyl transferases required for fatty acid, peptide and siderophore biosynthesis have been characterized and a consensus sequence noted in order to facilitate future identification of additional proteins catalyzing phosphopantetheinyl transfer.

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