Research Project
Grant-in-Aid for Challenging Exploratory Research
Pheganomycin (PGM) (1) consists of a nonproteinogenic amino acid, (S)-2-(3,5-dihydroxy-4-methoxyphenyl)-2-guanidinoacetic acid (2) at the N-terminus and a proteinogenic core peptide derived from NVKDGPT or NVKDR. The biosynthetic gene cluster was identified in Streptomyces cirratus to contain a gene encoding a precursor peptide, which included both the core peptides, and several genes plausibly encoding enzymes for 2 biosynthesis. We identified a gene (pgm1) responsible for the peptide bond formation between 2 and the peptides in the cluster. A pgm1-disruptant lost 1 productivity and recombinant PGM1 catalyzed the ATP-dependent peptide bond formation. This is the first example of cooperative peptide synthesis achieved by ribosome and peptide ligase using a peptide as a nucleophile. PGM1 accepted a variety of peptides as the nucleophile and the flexibility was comprehended by the crystal structure of PGM1 and the mutagenesis analyses.
All 2015 2014 2013 Other
All Journal Article (4 results) (of which Peer Reviewed: 3 results, Open Access: 2 results, Acknowledgement Compliant: 2 results) Presentation (13 results) (of which Invited: 3 results) Remarks (1 results)
Nature Chemical Biology
Volume: 11 Issue: 1 Pages: 71-76
10.1038/nchembio.1697
120005619608
化学
Volume: 70 Pages: 40-44
J. Biosci. Bioeng
Volume: 117(2) Issue: 2 Pages: 178-183
10.1016/j.jbiosc.2013.07.013
110010039563
Volume: in press Issue: 6 Pages: 607-612
10.1016/j.jbiosc.2012.12.021
http://www.hokudai.ac.jp/news/141125_pr_eng.pdf