5K58

Structure of the K. pneumonia SlmA-DNA complex bound to the C-terminal of the cell division protein FtsZ


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.772 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.0 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. U.S.A. 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
E, F, A, B
190Escherichia coli O139:H28 (strain E24377A / ETEC)Mutation(s): 1 
Gene Names: slmA
Find proteins for A7ZTJ2 (Escherichia coli O139:H28 (strain E24377A / ETEC))
Go to UniProtKB:  A7ZTJ2
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Octapeptide
L, K, N, M
8Escherichia 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')R,T12synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.772 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.247 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 84.800α = 90.00
b = 84.800β = 90.00
c = 161.600γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
MOSFLMdata reduction
PHENIXrefinement
MOLREPphasing
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-05-23 
  • Released Date: 2016-06-22 
  • Deposition Author(s): Schumacher, M.

Revision History 

  • Version 1.0: 2016-06-22
    Type: Initial release