5IDJ

Bifunctional histidine kinase CckA (domains DHp-CA) in complex with ADP/Mg2+

Summary for 5IDJ

• Entry DOI: 10.2210/pdb5idj/pdb
• Descriptor: Histidine kinase, ADENOSINE-5'-DIPHOSPHATE, MAGNESIUM ION, ... (4 entities in total)
• Functional Keywords: bifunctional, histidine kinase, phosphatase, transferase
• Biological source: Caulobacter vibrioides
• Total number of polymer chains: 1
• Total formula weight: 26989.75

Authors

Dubey, B.N.,Schirmer, T. (deposition date: 2016-02-24, release date: 2016-10-05, Last modification date: 2024-02-07)

Primary citation

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

Experimental method

X-RAY DIFFRACTION (3.02 Å)