A peptide ligase and the ribosome cooperate to synthesize the peptide pheganomycin

• Noike, Motoyoshi

• Matsui, Takashi

• Ooya, Koichi

• Sasaki, Ikuo

• Ohtaki, Shouta

• Hamano, Yoshimitsu

• Maruyama, Chitose

• Ishikawa, Jun

• Satoh, Yasuharu

• Ito, Hajime

• Morita, Hiroyuki

• Dairi, Tohru

Abstract

Peptide antibiotics are typically biosynthesized by one of two distinct machineries in a ribosome-dependent or ribosome-independent manner. Pheganomycin (PGM (1)) and related analogs consist of the nonproteinogenic amino acid (S)-2-(3,5-dihydroxy-4-hydroxymethyl)phenyl-2-guanidinoacetic acid (2) and a proteinogenic core peptide, making their origin uncertain. We report the identification of the biosynthetic gene cluster from Streptomyces cirratus responsible for PGM production. Unexpectedly, the cluster contains a gene encoding multiple precursor peptides along with several genes plausibly encoding enzymes for the synthesis of amino acid 2. We identified PGM1, which has an ATP-grasp domain, as potentially capable of linking the precursor peptides with 2, and validate this hypothesis using deletion mutants and in vitro reconstitution. We document PGM1's substrate permissivity, which could be rationalized by a large binding pocket as confirmed via structural and mutagenesis experiments. This is to our knowledge the first example of cooperative peptide synthesis achieved by ribosomes and peptide ligases using a peptide nucleophile.

Journal

• Nature chemical biology

  Nature chemical biology 11 (1), 71-76, 2015-01

  Nature Publishing Group

Details

• CRID: 1050001339017977344
• NII Article ID: 120005619608
• HANDLE: 2115/59457
• ISSN: 15524450
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles