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: 2.77 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.245 

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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 U S A 113: 4988-4993

  • DOI: https://doi.org/10.1073/pnas.1602327113
  • Primary Citation of Related Structures:  
    5HAW, 5HBU, 5HSZ, 5K58

  • 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. 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

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nucleoid occlusion factor SlmAA [auth E],
B [auth F],
C [auth A],
D [auth B]
190Escherichia coli O139:H28 str. E24377AMutation(s): 1 
Gene Names: slmAEcE24377A_4142
UniProt
Find proteins for P0C093 (Escherichia coli (strain K12))
Explore P0C093 
Go to UniProtKB:  P0C093
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C093
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
OctapeptideG [auth L],
H [auth K],
I [auth N],
J [auth M]
8synthetic constructMutation(s): 0 
UniProt
Find proteins for P0A9A6 (Escherichia coli (strain K12))
Explore P0A9A6 
Go to UniProtKB:  P0A9A6
Entity Groups  
UniProt GroupP0A9A6
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*TP*GP*AP*GP*TP*AP*CP*TP*CP*AP*C)-3')E [auth R],
F [auth T]
12synthetic construct
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.245 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.8α = 90
b = 84.8β = 90
c = 161.6γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-06-22
    Type: Initial release
  • Version 1.1: 2024-03-06
    Changes: Data collection, Database references, Derived calculations