9I2Q image
Entry Detail
PDB ID:
9I2Q
EMDB ID:
Title:
Wzc-K540M-3YE MgADP C1
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2025-01-22
Release Date:
2025-04-30
Method Details:
Experimental Method:
Resolution:
2.90 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Putative transmembrane protein Wzc
Chain IDs:A (auth: D), B (auth: E), C (auth: F), D (auth: G), E (auth: H), F (auth: A), G (auth: B), H (auth: C)
Chain Length:727
Number of Molecules:8
Biological Source:Escherichia coli
Primary Citation
Molecular basis for the phosphorylation of bacterial tyrosine kinase Wzc.
Nat Commun 16 3437 3437 (2025)
PMID: 40210632 DOI: 10.1038/s41467-025-58693-7

Abstact

The regulation of polymerisation and translocation of biomolecules is fundamental. Wzc, an integral cytoplasmic membrane tyrosine autokinase protein serves as the master regulator of the biosynthesis and export of many bacterial capsular polysaccharides and exopolysaccharides. Such polysaccharides play essential roles in infection, defence, and some are important industrial products. Wzc comprises a large periplasmic domain, two transmembrane helices and a C-terminal cytoplasmic kinase domain with a tyrosine-rich tail. Wzc regulates polymerisation functions through cycling the formation and dissociation of an octameric complex, driven by changes in the phosphorylation status of the tyrosine-rich tail. E. coli Wzc serves a model for a wider family of polysaccharide co-polymerases. Here, we determine structures of intermediate states with different extents of phosphorylation. Structural and computational data reveal the pre-ordering of the tyrosine-rich tail, the molecular basis underlying the unidirectionality of phosphorylation events, and the underlying structural dynamics on how phosphorylation status is transmitted.

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Primary Citation of related structures