title: Biosynthetic pathway for mannopeptimycins, lipoglycopeptide antibiotics active against drug-resistant gram-positive pathogens.
abstract: The mannopeptimycins are a novel class of lipoglycopeptide antibiotics active against multidrug-resistant pathogens with potential as clinically useful antibacterials. This report is the first to describe the biosynthesis of this novel class of mannosylated lipoglycopeptides. Included here are the cloning, sequencing, annotation, and manipulation of the mannopeptimycin biosynthetic gene cluster from Streptomyces hygroscopicus NRRL 30439. Encoded by genes within the mannopeptimycin biosynthetic gene cluster are enzymes responsible for the generation of the hexapeptide core (nonribosomal peptide synthetases [NRPS]) and tailoring reactions (mannosylation, isovalerylation, hydroxylation, and methylation). The NRPS system is noncanonical in that it has six modules utilizing only five amino acid-specific adenylation domains and it lacks a prototypical NRPS macrocyclizing thioesterase domain. Analysis of the mannopeptimycin gene cluster and its engineering has elucidated the mannopeptimycin biosynthetic pathway and provides the framework to make new and improved mannopeptimycins biosynthetically.
authors.affiliation: Wyeth Research, Chemical and Screening Sciences, Natural Products Discovery, Pearl River, NY 10965, USA.
authors.forename: Nathan A
authors.initials: NA
authors.lastname: Magarvey
authors.forename: Brad
authors.initials: B
authors.lastname: Haltli
authors.forename: Min
authors.initials: M
authors.lastname: He
authors.forename: Michael
authors.initials: M
authors.lastname: Greenstein
authors.forename: John A
authors.initials: JA
authors.lastname: Hucul
mesh_terms: D000900:Anti-Bacterial Agents / Q000096:biosynthesis* / Q000737:chemistry / Q000494:pharmacology*; D003001:Cloning, Molecular; D003360:Cosmids; D024881:Drug Resistance, Bacterial; D005798:Genes, Bacterial; D006020:Glycopeptides / Q000096:biosynthesis* / Q000737:chemistry / Q000235:genetics / Q000494:pharmacology*; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000302:isolation & purification; D008954:Models, Biological; D005810:Multigene Family / Q000235:genetics; D009844:Oligosaccharides / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D016366:Open Reading Frames; D017434:Protein Structure, Tertiary; D013302:Streptomyces / Q000201:enzymology / Q000235:genetics / Q000378:metabolism; D013379:Substrate Specificity
chemical_list: D000900:Anti-Bacterial Agents; D006020:Glycopeptides; D009844:Oligosaccharides; C478082:mannopeptimycin