5Y6G

PilZ domain with c-di-GMP of YcgR from Escherichia coli

5Y6G の概要

• エントリーDOI: 10.2210/pdb5y6g/pdb
• 分子名称: Flagellar brake protein YcgR, 9,9'-[(2R,3R,3aS,5S,7aR,9R,10R,10aS,12S,14aR)-3,5,10,12-tetrahydroxy-5,12-dioxidooctahydro-2H,7H-difuro[3,2-d:3',2'-j][1,3,7,9,2,8]tetraoxadiphosphacyclododecine-2,9-diyl]bis(2-amino-1,9-dihydro-6H-purin-6-one), SULFATE ION, ... (4 entities in total)
• 機能のキーワード: c-di-gmp binding, pilz domain, flagellar brake protein, protein binding
• 由来する生物種: Escherichia coli K-12
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 18632.59

構造登録者

Hou, Y.J.,Wang, D.C.,Li, D.F. (登録日: 2017-08-11, 公開日: 2018-07-18, 最終更新日: 2023-11-22)

主引用文献

Hou, Y.J.,Yang, W.S.,Hong, Y.,Zhang, Y.,Wang, D.C.,Li, D.F.
Structural insights into the mechanism of c-di-GMP-bound YcgR regulating flagellar motility inEscherichia coli.
J.Biol.Chem., 295:808-821, 2020

PubMed Abstract: The motile-sessile transition is critical for bacterial survival and growth. Cyclic-di-GMP (c-di-GMP) plays a central role in controlling this transition and regulating biofilm formation via various effectors. As an effector of c-di-GMP in and related species, the PilZ domain-containing protein YcgR responds to elevated c-di-GMP concentrations and acts on the flagellar motor to suppress bacterial motility in a brakelike fashion, which promotes bacterial surface attachment. To date, several target proteins within the motor, MotA, FliG, and FliM, along with different regulatory mechanisms have been reported. However, how YcgR acts on these components remains unclear. Here, we report that activated YcgR stably binds to MotA at the MotA-FliG interface and thereby regulates bacterial swimming. Biochemical and structural analyses revealed that c-di-GMP rearranges the PilZ domain configuration, resulting in the formation of a MotA-binding patch consisting of an RR motif and the C-tail helix α3. Moreover, we noted that a conserved region in the YcgR-N domain, which is independent of MotA interaction, is necessary for motility regulation. On the basis of these findings, we infer that the YcgR-N domain is required for activity on other motor proteins. We propose that activated YcgR appends to MotA via its PilZ domain and thereby interrupts the MotA-FliG interaction and simultaneously interacts with other motor proteins via its YcgR-N domain to inhibit flagellar motility. Our findings suggest that the mode of interaction between YcgR and motor proteins may be shared by other PilZ family proteins.

PubMed: 31836667
DOI: 10.1074/jbc.RA119.009739

実験手法

X-RAY DIFFRACTION (2.3 Å)