1TYG

Structure of the thiazole synthase/ThiS complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Thiamin Biosynthesis in Bacillus subtilis: Structure of the Thiazole Synthase/Sulfur Carrier Protein Complex

Settembre, E.C.Dorrestein, P.C.Zhai, H.Chatterjee, A.McLafferty, F.W.Begley, T.P.Ealick, S.E.

(2004) Biochemistry 43: 11647-11657

  • DOI: 10.1021/bi0488911

  • PubMed Abstract: 
  • Thiazole synthase is the key enzyme involved in the formation of the thiazole moiety of thiamin pyrophosphate. We have determined the structure of this enzyme in complex with ThiS, the sulfur carrier protein, at 3.15 A resolution. Thiazole synthase i ...

    Thiazole synthase is the key enzyme involved in the formation of the thiazole moiety of thiamin pyrophosphate. We have determined the structure of this enzyme in complex with ThiS, the sulfur carrier protein, at 3.15 A resolution. Thiazole synthase is a tetramer with 222 symmetry. The monomer is a (betaalpha)(8) barrel with similarities to the aldolase class 1 and flavin mononucleotide dependent oxidoreductase and phosphate binding superfamilies. The sulfur carrier protein (ThiS) is a compact protein with a fold similar to that of ubiquitin. The structure allowed us to model the substrate, deoxy-D-xylulose 5-phosphate (DXP), in the active site. This model identified Glu98 and Asp182 as new active site residues likely to be involved in the catalysis of thiazole formation. The function of these residues was probed by mutagenesis experiments, which confirmed that both residues are essential for thiazole formation and identified Asp182 as the base involved in the deprotonation at C3 of the thiazole synthase DXP imine. Comparison of the ThiS binding surface to the surface of ubiquitin identified a conserved hydrophobic patch of unknown function on ubiquitin that may be involved in complex formation between ubiquitin and one of its binding partners.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
yjbS
B, G
87Bacillus subtilis (strain 168)Gene Names: thiS (yjbS)
Find proteins for O31617 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O31617
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thiazole biosynthesis protein thiG
A, C
253Bacillus subtilis (strain 168)Gene Names: thiG (yjbT)
EC: 2.8.1.10
Find proteins for O31618 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O31618
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, C
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.242 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 91.654α = 90.00
b = 91.654β = 90.00
c = 401.300γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
SOLVEphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance