Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/208
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dc.contributor.authorGokhale, Rajesh S-
dc.date.accessioned2014-11-19T11:12:17Z-
dc.date.available2014-11-19T11:12:17Z-
dc.date.issued2008-04-
dc.identifier.urihttp://hdl.handle.net/123456789/208-
dc.description.abstractDictyostelium discoideum exhibits the largest repository of polyketide synthase (PKS) proteins of all known genomes. However, the functional relevance of these proteins in the biology of this organism remains largely obscure. On the basis of computational, biochemical, and gene expression studies, we propose that the multifunctional Dictyostelium PKS (DiPKS) protein DiPKS1 could be involved in the biosynthesis of the differentiation regulating factor 4-methyl-5-pentylbenzene-1,3-diol (MPBD). Our cell-free reconstitution studies of a novel acyl carrier protein Type III PKS didomain from DiPKS1 revealed a crucial role of protein-protein interactions in determining the final biosynthetic product. Whereas the Type III PKS domain by itself primarily produces acyl pyrones, the presence of the interacting acyl carrier protein domain modulates the catalytic activity to produce the alkyl resorcinol scaffold of MPBD. Furthermore, we have characterized an O-methyltransferase (OMT12) from Dictyostelium with the capability to modify this resorcinol ring to synthesize a variant of MPBD. We propose that such a modification in vivo could in fact provide subtle variations in biological function and specificity. In addition, we have performed systematic computational analysis of 45 multidomain PKSs, which revealed several unique features in DiPKS proteins. Our studies provide a new perspective in understanding mechanisms by which metabolic diversity could be generated by combining existing functional scaffolds.en_US
dc.publisherThe American Society for Biochemistry and Molecular Biology, Inc.en_US
dc.titleDissecting the functional role of polyketide synthases in Dictyostelium discoideum: biosynthesis of the differentiation regulating factor 4-methyl-5-pentylbenzene-1,3-diolen_US
dc.contributor.coauthorMohanty, Debasisa-
dc.contributor.coauthorChhabra, Arush-
dc.contributor.coauthorPhatale, Pallavi A-
dc.contributor.coauthorSamrat, Subodh K-
dc.contributor.coauthorSharma, Jyoti-
dc.contributor.coauthorGosain, Anuradha-
dc.contributor.coauthorSaran, Shweta-
dc.contributor.coauthorGhosh, Ratna-
dc.keywordDictyostelium discoideum, Polyketide Synthasesen_US
dc.journalJournal of Biological Chemistryen_US
dc.volumeno283en_US
dc.issueno17en_US
dc.pages11348-11354en_US
Appears in Collections:Bioinformatics Centre, Publications

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