Active-site residue, domain and module swaps in modular polyketide synthases.
J Ind Microbiol Biotechnol 2003;
30:489-94. [PMID:
12811585 DOI:
10.1007/s10295-003-0062-0]
[Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2003] [Accepted: 04/05/2003] [Indexed: 10/25/2022]
Abstract
Sequence comparisons of multiple acyltransferase (AT) domains from modular polyketide synthases (PKSs) have highlighted a correlation between a short sequence motif and the nature of the extender unit selected. When this motif was specifically altered in the bimodular model PKS DEBS1-TE of Saccharopolyspora erythraea, the products included triketide lactones in which acetate extension units had been incorporated instead of propionate units at the predicted positions. We also describe a cassette system for convenient construction of hybrid modular PKSs based on the tylosin PKS in Streptomyces fradiae and demonstrate its use in domain and module swaps.
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