1OKG

3-mercaptopyruvate sulfurtransferase from Leishmania major

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

The Crystal Structure of Leishmania Major 3-Mercaptopyruvate Sulfurtransferase: A Three-Domain Architecture with a Serine Protease-Like Triad at the Active Site

Alphey, M.S., Williams, R.A.M., Mottram, J.C., Coombs, G.H., Hunter, W.N.

(2003) J.Biol.Chem. 278: 48219

  • DOI: 10.1074/jbc.M307187200

  • PubMed Abstract: 

    • Leishmania major 3-mercaptopyruvate sulfurtransferase is a crescent-shaped molecule comprising three domains. The N-terminal and central domains are similar to the thiosulfate sulfurtransferase rhodanese and create the active site containing a persul ...

    Leishmania major 3-mercaptopyruvate sulfurtransferase is a crescent-shaped molecule comprising three domains. The N-terminal and central domains are similar to the thiosulfate sulfurtransferase rhodanese and create the active site containing a persulfurated catalytic cysteine (Cys-253) and an inhibitory sulfite coordinated by Arg-74 and Arg-185. A serine protease-like triad, comprising Asp-61, His-75, and Ser-255, is near Cys-253 and represents a conserved feature that distinguishes 3-mercaptopyruvate sulfurtransferases from thiosulfate sulfurtransferases. During catalysis, Ser-255 may polarize the carbonyl group of 3-mercaptopyruvate to assist thiophilic attack, whereas Arg-74 and Arg-185 bind the carboxylate group. The enzyme hydrolyzes benzoyl-Arg-p-nitroanilide, an activity that is sensitive to the presence of the serine protease inhibitor N alpha-p-tosyl-L-lysine chloromethyl ketone, which also lowers 3-mercaptopyruvate sulfurtransferase activity, presumably by interference with the contribution of Ser-255. The L. major 3-mercaptopyruvate sulfurtransferase is unusual with an 80-amino acid C-terminal domain, bearing remarkable structural similarity to the FK506-binding protein class of peptidylprolyl cis/trans-isomerase. This domain may be involved in mediating protein folding and sulfurtransferase-protein interactions.

    Organizational Affiliation: 

    Division of Biological Chemistry and Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
POSSIBLE 3-MERCAPTOPYRUVATE SULFURTRANSFERASE
A
373Leishmania majorMutation(s): 1 
Gene Names: MST
EC: 2.8.1.2
Find proteins for Q7K9G0 (Leishmania major)
Go to UniProtKB:  Q7K9G0
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO3
Query on SO3
Download SDF File 
Download CCD File 
A
SULFITE ION
O3 S
LSNNMFCWUKXFEE-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA
Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
CSR
Query on CSR
A
L-PEPTIDE LINKINGC3 H8 As N O5 SCYS
CSS
Query on CSS
A
L-PEPTIDE LINKINGC3 H7 N O2 S2CYS
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.208 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 109.574α = 90.00
b = 109.574β = 90.00
c = 67.300γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SOLVEphasing
REFMACrefinement
MLPHAREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance