Biological Assembly 1  

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

Global Symmetry: Tetrahedral - T  (3D View)
Global Stoichiometry: Homo 12-mer - A12 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 199.32 kDa 
• Atom Count: 15099 
• Modelled Residue Count: 1788 
• Deposited Residue Count: 1872 
• Unique protein chains: 1

1GU0

CRYSTAL STRUCTURE OF TYPE II DEHYDROQUINASE FROM STREPTOMYCES COELICOLOR

• PDB DOI: 10.2210/pdb1GU0/pdb

• Classification: LYASE
• Organism(s): Streptomyces coelicolor
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2002-01-22 Released: 2002-04-12 
• Deposition Author(s): Roszak, A.W., Krell, T., Robinson, D., Hunter, I.S., Coggins, J.R., Lapthorn, A.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.242 
• R-Value Work: 0.200 
• R-Value Observed: 0.204 

Literature

The Structure and Mechanism of the Type II Dehydroquinase from Streptomyces Coelicolor

Roszak, A.W., Robinson, D., Krell, T., Hunter, I.S., Fredrickson, M., Abell, C., Coggins, J.R., Lapthorn, A.J.

(2002) Structure 10: 493

• PubMed: 11937054 
• DOI: 10.1016/s0969-2126(02)00747-5
• Primary Citation of Related Structures:  
  1D0I, 1GTZ, 1GU0, 1GU1


• PubMed Abstract: 
  

The structure of the type II DHQase from Streptomyces coelicolor has been solved and refined to high resolution in complexes with a number of ligands, including dehydroshikimate and a rationally designed transition state analogue, 2,3-anhydro-quinic acid. These structures define the active site of the enzyme and the role of key amino acid residues and provide snap shots of the catalytic cycle. The resolution of the flexible lid domain (residues 21-31) shows that the invariant residues Arg23 and Tyr28 close over the active site cleft. The tyrosine acts as the base in the initial proton abstraction, and evidence is provided that the reaction proceeds via an enol intermediate. The active site of the structure of DHQase in complex with the transition state analog also includes molecules of tartrate and glycerol, which provide a basis for further inhibitor design.

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Organizational Affiliation: 

Department of Chemistry, Institute of Biomedical and Life Sciences, University of Glasgow, Scotland, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-DEHYDROQUINATE DEHYDRATASE	A, B, C, D, E, F, G, H, I, J, K, L	156	Streptomyces coelicolor	Mutation(s): 0  EC: 4.2.1.10
UniProt
Find proteins for P15474 (Streptomyces coelicolor (strain ATCC BAA-471 / A3(2) / M145)) Explore P15474  Go to UniProtKB:  P15474

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TRS	M [auth A], N [auth D], O [auth G], P [auth J]	2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL C4 H12 N O3 LENZDBCJOHFCAS-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.242 
• R-Value Work: 0.200 
• R-Value Observed: 0.204 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 116.2	α = 90
b = 138.4	β = 90
c = 141.2	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-01-22 
• Released Date: 2002-04-12 
Deposition Author(s): Roszak, A.W., Krell, T., Robinson, D., Hunter, I.S., Coggins, J.R., Lapthorn, A.J.

Revision History  

• Version 1.0: 2002-04-12
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance