Crystal structure of Sortase B from S. aureus complexed with MTSET

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 

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The structure of sortase B, a cysteine transpeptidase that tethers surface protein to the Staphylococcus aureus cell wall

Zong, Y.Mazmanian, S.K.Schneewind, O.Narayana, S.V.

(2004) Structure 12: 105-112

  • DOI: https://doi.org/10.1016/j.str.2003.11.021
  • Primary Citation of Related Structures:  
    1QWZ, 1QX6, 1QXA

  • PubMed Abstract: 

    Many surface proteins of Gram-positive bacteria, which play important roles during the pathogenesis of human infections, are anchored to the cell wall envelope by a mechanism requiring sortases. Sortase B, a cysteine transpeptidase from Staphylococcus aureus, cleaves the C-terminal sorting signal of IsdC at the NPQTN motif and tethers the polypeptide to the pentaglycine cell wall cross-bridge. During catalysis, the active site cysteine of sortase and the cleaved substrate form an acyl intermediate, which is then resolved by the amino group of pentaglycine cross-bridges. We report here the crystal structures of SrtBDeltaN30 in complex with two active site inhibitors, MTSET and E64, and with the cell wall substrate analog tripleglycine. These structures reveal, for the first time, the active site disposition and the unique Cys-Arg catalytic machinery of the cysteine transpeptidase, and they also provide useful information for the future design of anti-infective agents against sortases.

  • Organizational Affiliation

    Center for Biophysical Sciences and Engineering, School of Optometry, University of Alabama at Birmingham, Birmingham, AL 35294, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NPQTN specific sortase B235Staphylococcus aureusMutation(s): 0 
Find proteins for Q2FZE3 (Staphylococcus aureus (strain NCTC 8325 / PS 47))
Explore Q2FZE3 
Go to UniProtKB:  Q2FZE3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2FZE3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.482α = 90
b = 61.566β = 91.58
c = 45.727γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-06
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance