5HAW

structures of the NO factor SlmA bound to DNA and the cytoskeletal cell division protein FtsZ


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structures of the nucleoid occlusion protein SlmA bound to DNA and the C-terminal domain of the cytoskeletal protein FtsZ.

Schumacher, M.A.Zeng, W.

(2016) Proc.Natl.Acad.Sci.USA 113: 4988-4993

  • DOI: 10.1073/pnas.1602327113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cell division in most prokaryotes is mediated by FtsZ, which polymerizes to create the cytokinetic Z ring. Multiple FtsZ-binding proteins regulate FtsZ polymerization to ensure the proper spatiotemporal formation of the Z ring at the division site. T ...

    Cell division in most prokaryotes is mediated by FtsZ, which polymerizes to create the cytokinetic Z ring. Multiple FtsZ-binding proteins regulate FtsZ polymerization to ensure the proper spatiotemporal formation of the Z ring at the division site. The DNA-binding protein SlmA binds to FtsZ and prevents Z-ring formation through the nucleoid in a process called "nucleoid occlusion" (NO). As do most FtsZ-accessory proteins, SlmA interacts with the conserved C-terminal domain (CTD) that is connected to the FtsZ core by a long, flexible linker. However, SlmA is distinct from other regulatory factors in that it must be DNA-bound to interact with the FtsZ CTD. Few structures of FtsZ regulator-CTD complexes are available, but all reveal the CTD bound as a helix. To deduce the molecular basis for the unique SlmA-DNA-FtsZ CTD regulatory interaction and provide insight into FtsZ-regulator protein complex formation, we determined structures of Escherichia coli, Vibrio cholera, and Klebsiella pneumonia SlmA-DNA-FtsZ CTD ternary complexes. Strikingly, the FtsZ CTD does not interact with SlmA as a helix but binds as an extended conformation in a narrow, surface-exposed pocket formed only in the DNA-bound state of SlmA and located at the junction between the DNA-binding and C-terminal dimer domains. Binding studies are consistent with the structure and underscore key interactions in complex formation. Combined, these data reveal the molecular basis for the SlmA-DNA-FtsZ interaction with implications for SlmA's NO function and underscore the ability of the FtsZ CTD to adopt a wide range of conformations, explaining its ability to bind diverse regulatory proteins.


    Organizational Affiliation

    Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710 maria.schumacher@duke.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nucleoid occlusion factor SlmA
A, B
196Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Mutation(s): 0 
Gene Names: slmA
Find proteins for Q9KVD2 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KVD2
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
FtsZ CTT
L, K
10Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ftsZ (sfiB, sulB)
Find proteins for P0A9A6 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A9A6
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*TP*GP*AP*GP*TP*AP*CP*TP*CP*AP*C)-3')Z12synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.192 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 69.585α = 90.00
b = 69.585β = 90.00
c = 249.795γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHENIXrefinement
MOLREPphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-13
    Type: Initial release
  • Version 1.1: 2016-05-25
    Type: Database references