5IDM

Bifunctional histidine kinase CckA (domain, CA) in complex with c-di-GMP and AMPPNP/Mg2+

5IDM の概要

• エントリーDOI: 10.2210/pdb5idm/pdb
• 分子名称: Cell cycle histidine kinase CckA, PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER, MAGNESIUM ION, ... (5 entities in total)
• 機能のキーワード: bifunctional, histidine kinase, phosphatase, transferase
• 由来する生物種: Caulobacter vibrioides
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 41080.01

構造登録者

Dubey, B.N.,Schirmer, T. (登録日: 2016-02-24, 公開日: 2016-10-05, 最終更新日: 2024-06-19)

主引用文献

Dubey, B.N.,Lori, C.,Ozaki, S.,Fucile, G.,Plaza-Menacho, I.,Jenal, U.,Schirmer, T.
Cyclic di-GMP mediates a histidine kinase/phosphatase switch by noncovalent domain cross-linking.
Sci Adv, 2:e1600823-e1600823, 2016

PubMed Abstract: Histidine kinases are key components of regulatory networks in bacteria. Although many of these enzymes are bifunctional, mediating both phosphorylation and dephosphorylation of downstream targets, the molecular details of this central regulatory switch are unclear. We showed recently that the universal second messenger cyclic di-guanosine monophosphate (c-di-GMP) drives Caulobacter crescentus cell cycle progression by forcing the cell cycle kinase CckA from its default kinase into phosphatase mode. We use a combination of structure determination, modeling, and functional analysis to demonstrate that c-di-GMP reciprocally regulates the two antagonistic CckA activities through noncovalent cross-linking of the catalytic domain with the dimerization histidine phosphotransfer (DHp) domain. We demonstrate that both c-di-GMP and ADP (adenosine diphosphate) promote phosphatase activity and propose that c-di-GMP stabilizes the ADP-bound quaternary structure, which allows the receiver domain to access the dimeric DHp stem for dephosphorylation. In silico analyses predict that c-di-GMP control is widespread among bacterial histidine kinases, arguing that it can replace or modulate canonical transmembrane signaling.

PubMed: 27652341
DOI: 10.1126/sciadv.1600823

実験手法

X-RAY DIFFRACTION (1.9 Å)