Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 28.37 kDa 
• Atom Count: 2273 
• Modelled Residue Count: 235 
• Deposited Residue Count: 235 
• Unique protein chains: 1

1QWZ

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

• PDB DOI: 10.2210/pdb1QWZ/pdb

• Classification: HYDROLASE
• Organism(s): Staphylococcus aureus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-09-03 Released: 2004-04-06 
• Deposition Author(s): Zong, Y., Mazmanian, S.K., Schneewind, O., Narayana, S.V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.228 
• R-Value Work: 0.183 
• R-Value Observed: 0.183 

Literature

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

• PubMed: 14725770 
• DOI: 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NPQTN specific sortase B	A	235	Staphylococcus aureus	Mutation(s): 0  EC: 3.4.22.71
UniProt
Find proteins for Q2FZE3 (Staphylococcus aureus (strain NCTC 8325 / PS 47)) Explore Q2FZE3  Go to UniProtKB:  Q2FZE3

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ETM	G [auth A]	2-(TRIMETHYLAMMONIUM)ETHYL THIOL C5 H14 N S VFUGTBZQGUVGEX-UHFFFAOYSA-O
SO4	F [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NI	B [auth A], C [auth A], D [auth A], E [auth A]	NICKEL (II) ION Ni VEQPNABPJHWNSG-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 73.482	α = 90
b = 61.566	β = 91.58
c = 45.727	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-03 
• Released Date: 2004-04-06 
Deposition Author(s): Zong, Y., Mazmanian, S.K., Schneewind, O., Narayana, S.V.

Revision History  

• 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