Xray structure of E. coli YiiU

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.310 
  • R-Value Observed: 0.310 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


Novel Coiled-Coil Cell Division Factor Zapb Stimulates Z Ring Assembly and Cell Division.

Ebersbach, G.Galli, E.Moller-Jensen, J.Lowe, J.Gerdes, K.

(2008) Mol Microbiol 68: 720

  • DOI: https://doi.org/10.1111/j.1365-2958.2008.06190.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Formation of the Z ring is the first known event in bacterial cell division. However, it is not yet known how the assembly and contraction of the Z ring are regulated. Here, we identify a novel cell division factor ZapB in Escherichia coli that simultaneously stimulates Z ring assembly and cell division. Deletion of zapB resulted in delayed cell division and the formation of ectopic Z rings and spirals, whereas overexpression of ZapB resulted in nucleoid condensation and aberrant cell divisions. Localization of ZapB to the divisome depended on FtsZ but not FtsA, ZipA or FtsI, and ZapB interacted with FtsZ in a bacterial two-hybrid analysis. The simultaneous inactivation of FtsA and ZipA prevented Z ring assembly and ZapB localization. Time lapse microscopy showed that ZapB-GFP is present at mid-cell in a pattern very similar to that of FtsZ. Cells carrying a zapB deletion and the ftsZ84(ts) allele exhibited a synthetic sick phenotype and aberrant cell divisions. The crystal structure showed that ZapB exists as a dimer that is 100% coiled-coil. In vitro, ZapB self-assembled into long filaments and bundles. These results raise the possibility that ZapB stimulates Z ring formation directly via its capacity to self-assemble into larger structures.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
81Escherichia coliMutation(s): 0 
Find proteins for P0AF36 (Escherichia coli (strain K12))
Explore P0AF36 
Go to UniProtKB:  P0AF36
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AF36
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.321 
  • R-Value Work: 0.310 
  • R-Value Observed: 0.310 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.386α = 104.73
b = 40.777β = 97.03
c = 80.134γ = 93.56
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-02-05
    Type: Initial release
  • Version 1.1: 2014-02-05
    Changes: Database references, Derived calculations, Non-polymer description, Other, Structure summary, Version format compliance