The lantibiotic nukacin ISK-1 exists in an equilibrium between active and inactive lipid-II binding states.Fujinami, D., Mahin, A.A., Elsayed, K.M., Islam, M.R., Nagao, J.I., Roy, U., Momin, S., Zendo, T., Kohda, D., Sonomoto, K.
(2018) Commun Biol 1: 150-150
- PubMed: 30272026
- DOI: 10.1038/s42003-018-0150-3
- Primary Citation of Related Structures:
- PubMed 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 ...
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.
1Division of Structural Biology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582 Japan.,3Department of Functional Bioscience, Section of Infection Biology, Fukuoka Dental College, Fukuoka, 814-0175 Japan.,6Present Address: Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, 1000 Bangladesh.,2Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Laboratory of Microbial Technology, Kyushu University, Fukuoka, 812-8581 Japan.,Present Address: Microbiology and Industrial Irradiation Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Ganakbari, Savar 1207, Dhaka, 1349 Bangladesh.,5Present Address: Department of Microbiology, Faculty of Pharmacy, Misr International University, Cairo, 19648 Egypt.