Download MendeleyStructural basis for the regulation of chemotaxis by MapZ in the presence of c-di-GMP
Zhu, Y., Yuan, Z., Gu, L.(2017) Acta Crystallogr D Struct Biol 73: 683-691
- PubMed: 28777083
- DOI: https://doi.org/10.1107/S2059798317009998
- Primary Citation of Related Structures:
5XLX, 5XLY - PubMed Abstract:
The bacterial second messenger cyclic diguanylate monophosphate (c-di-GMP) mediates multiple aspects of bacterial physiology through binding to various effectors. In some cases, these effectors are single-domain proteins which only contain a PilZ domain. It remains largely unknown how single-domain PilZ proteins function and regulate their downstream targets. Recently, a single-domain PilZ protein, MapZ (PA4608), was identified to inhibit the activity of the methyltransferase CheR1. Here, crystal structures of the C-terminal domain of CheR1 containing SAH and of CheR1 in complex with c-di-GMP-bound MapZ are reported. It was observed that the binding site of MapZ in CheR1 partially overlaps with the SAH/SAM-binding pocket. Consequently, binding of MapZ blocks SAH/SAM binding. This provides direct structural evidence on the mechanism of inhibition of CheR1 by MapZ in the presence of c-di-GMP.
Organizational Affiliation:
State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, People's Republic of China.
