The lantibiotic nukacin ISK-1 exists in an equilibrium between active and inactive lipid-II binding states

Daisuke Fujinami, Abdullah Al -Mahin, Khaled M. Elsayed, Mohammad R. Islam, Jun ichi Nagao, Urmi Roy, Sabrina Momin, Takeshi Zendo, Daisuke Kohda, Kenji Sonomoto

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The lantibiotic nukacin ISK-1 exerts antimicrobial activity through binding to lipid II. Here, we perform NMR analyses of the structure of nukacin ISK-1 and the interaction with lipid II. Unexpectedly, nukacin ISK-1 exists in two structural states in aqueous solution, with an interconversion rate on a time scale of seconds. The two structures differ in the relative orientations of the two lanthionine rings, ring A and ring C. Chemical shift perturbation induced by the titration of lipid II reveals that only one state was capable of binding to lipid II. On the molecular surface of the active state, a multiple hydrogen-bonding site formed by amino acid residues in the ring A region is adjacent to a hydrophobic surface formed by residues in the ring C region, and we propose that these sites interact with the pyrophosphate moiety and the isoprene chain of the lipid II molecule, respectively.

Original languageEnglish
Article number150
JournalCommunications Biology
Volume1
Issue number1
DOIs
Publication statusPublished - Dec 1 2018

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • Medicine (miscellaneous)

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