RT Journal Article SR Electronic(1) A1 Miao, Vivian A1 Coëffet-LeGal, Marie-Françoise A1 Brian, Paul A1 Brost, Renee A1 Penn, Julia A1 Whiting, Andrew A1 Martin, Steven A1 Ford, Robert A1 Parr, Ian A1 Bouchard, Mario A1 Silva, Christopher J. A1 Wrigley, Stephen K. A1 Baltz, Richard H.YR 2005 T1 Daptomycin biosynthesis in Streptomyces roseosporus: cloning and analysis of the gene cluster and revision of peptide stereochemistry JF Microbiology, VO 151 IS 5 SP 1507 OP 1523 DO https://doi.org/10.1099/mic.0.27757-0 PB Microbiology Society, SN 1465-2080, AB Daptomycin is a 13 amino acid, cyclic lipopeptide produced by a non-ribosomal peptide synthetase (NRPS) mechanism in Streptomyces roseosporus. A 128 kb region of S. roseosporus DNA was cloned and verified by heterologous expression in Streptomyces lividans to contain the daptomycin biosynthetic gene cluster (dpt). The cloned region was completely sequenced and three genes (dptA, dptBC, dptD) encoding the three subunits of an NRPS were identified. The catalytic domains in the subunits, predicted to couple five, six or two amino acids, respectively, included a novel activation domain and amino-acid-binding pocket for incorporating the unusual amino acid l-kynurenine (Kyn), three types of condensation domains and an extra epimerase domain (E-domain) in the second module. Novel genes (dptE, dptF) whose products likely work in conjunction with a unique condensation domain to acylate the first amino acid, as well as other genes (dptI, dptJ) probably involved in supply of the non-proteinogenic amino acids l-3-methylglutamic acid and Kyn, were located next to the NRPS genes. The unexpected E-domain suggested that daptomycin would have d-Asn, rather than l-Asn, as originally assigned, and this was confirmed by comparing stereospecific synthetic peptides and the natural product both chemically and microbiologically., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/mic.0.27757-0