1K6Z

Crystal Structure of the Yersinia Secretion Chaperone SycE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.194 

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This is version 1.3 of the entry. See complete history


Literature

Three-dimensional structure of the type III secretion chaperone SycE from Yersinia pestis.

Evdokimov, A.G.Tropea, J.E.Routzahn, K.M.Waugh, D.S.

(2002) Acta Crystallogr D Biol Crystallogr 58: 398-406

  • DOI: https://doi.org/10.1107/s090744490200015x
  • Primary Citation of Related Structures:  
    1K6Z

  • PubMed Abstract: 

    Many bacterial pathogens utilize a type III (contact-dependent) secretion system to inject cytotoxic effector proteins directly into host cells. This ingenious mechanism, designed for both bacterial offense and defense, has been studied most extensively in Yersinia spp. To be exported efficiently, at least three of the effectors (YopE, YopH and YopT) and several other proteins that transit the type III secretion pathway in Yersinia (YopN, YopD and YopB) must first form transient complexes with cognate-specific Yop chaperone (Syc) proteins. The cytotoxic effector YopE, a selective activator of mammalian Rho-family GTPases, associates with SycE. Here, the structure of Y. pestis SycE at 1.95A resolution is reported. SycE possesses a novel fold with an unusual dimerization motif and an intriguing basic cavity located on the dyad axis of the dimer that may participate in its interaction with YopE.


  • Organizational Affiliation

    Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, PO Box B, Frederick, MD 21702-1201, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Type III secretion chaperone SycE
A, B
141Yersinia pestisMutation(s): 3 
Gene Names: SycE
UniProt
Find proteins for P31491 (Yersinia pestis)
Explore P31491 
Go to UniProtKB:  P31491
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31491
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.194 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.879α = 90
b = 56.038β = 114.04
c = 54.993γ = 90
Software Package:
Software NamePurpose
SHELXDphasing
SHARPphasing
SHELXL-97refinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-10-31
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-12-21
    Changes: Database references, Derived calculations, Refinement description