Crystallographic Structure of SurA first peptidyl-prolyl isomerase domain complexed with peptide WEYIPNV

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.226 

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The Periplasmic Bacterial Molecular Chaperone SurA Adapts its Structure to Bind Peptides in Different Conformations to Assert a Sequence Preference for Aromatic Residues.

Xu, X.Wang, S.Hu, Y.X.McKay, D.B.

(2007) J Mol Biol 373: 367-381

  • DOI: https://doi.org/10.1016/j.jmb.2007.07.069
  • Primary Citation of Related Structures:  
    2PV1, 2PV2, 2PV3

  • PubMed Abstract: 

    The periplasmic molecular chaperone protein SurA facilitates correct folding and maturation of outer membrane proteins in Gram-negative bacteria. It preferentially binds peptides that have a high fraction of aromatic amino acids. Phage display selections, isothermal titration calorimetry and crystallographic structure determination have been used to elucidate the basis of the binding specificity. The peptide recognition is imparted by the first peptidyl-prolyl isomerase (PPIase) domain of SurA. Crystal structures of complexes between peptides of sequence WEYIPNV and NFTLKFWDIFRK with the first PPIase domain of the Escherichia coli SurA protein at 1.3 A resolution, and of a complex between the dodecapeptide and a SurA fragment lacking the second PPIase domain at 3.4 A resolution, have been solved. SurA binds as a monomer to the heptapeptide in an extended conformation. It binds as a dimer to the dodecapeptide in an alpha-helical conformation, predicated on a substantial structural rearrangement of the SurA protein. In both cases, side-chains of aromatic residues of the peptides contribute a large fraction of the binding interactions. SurA therefore asserts a recognition preference for aromatic amino acids in a variety of sequence configurations by adopting alternative tertiary and quaternary structures to bind peptides in different conformations.

  • Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chaperone surA103Escherichia coliMutation(s): 0 
Gene Names: surA
Find proteins for P0ABZ6 (Escherichia coli (strain K12))
Explore P0ABZ6 
Go to UniProtKB:  P0ABZ6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0ABZ6
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Glycosyl transferase, group 17Moorella thermoacetica (strain ATCC 39073 / JCM 9320)Mutation(s): 0 
Find proteins for Q2RHX9 (Moorella thermoacetica (strain ATCC 39073 / JCM 9320))
Explore Q2RHX9 
Go to UniProtKB:  Q2RHX9
Entity Groups  
UniProt GroupQ2RHX9
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.226 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.886α = 90
b = 98.82β = 90
c = 41.053γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Refinement description