Biological Assembly 1  

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Global Symmetry: Dihedral - D3  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

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

Macromolecule Content

• Total Structure Weight: 36384.26 
• Atom Count: 2277 
• Residue Count: 339 
• Unique protein chains: 1

1IZC

Crystal Structure Analysis of Macrophomate synthase

• DOI: 10.2210/pdb1IZC/pdb

• Classification: LYASE
• Organism(s): Macrophoma commelinae
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 1 


• Deposited: 2002-10-01 Released: 2003-04-01 
• Deposition Author(s): Ose, T., Watanabe, K., Mie, T., Honma, M., Watanabe, H., Yao, M., Oikawa, H., Tanaka, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.203 
• R-Value Work: 0.176 

Literature

Insight into a natural Diels-Alder reaction from the structure of macrophomate synthase.

Ose, T., Watanabe, K., Mie, T., Honma, M., Watanabe, H., Yao, M., Oikawa, H., Tanaka, I.

(2003) Nature 422: 185-189

• PubMed: 12634789 
• DOI: 10.1038/nature01454


• PubMed Abstract: 
  

The Diels-Alder reaction, which forms a six-membered ring from an alkene (dienophile) and a 1,3-diene, is synthetically very useful for construction of cyclic products with high regio- and stereoselectivity under mild conditions. It has been applied to the synthesis of complex pharmaceutical and biologically active compounds. Although evidence on natural Diels-Alderases has been accumulated in the biosynthesis of secondary metabolites, there has been no report on the structural details of the natural Diels-Alderases. The function and catalytic mechanism of the natural Diels-Alderase are of great interest owing to the diversity of molecular skeletons in natural Diels-Alder adducts. Here we present the 1.70 A resolution crystal structure of the natural Diels-Alderase, fungal macrophomate synthase (MPS), in complex with pyruvate. The active site of the enzyme is large and hydrophobic, contributing amino acid residues that can hydrogen-bond to the substrate 2-pyrone. These data provide information on the catalytic mechanism of MPS, and suggest that the reaction proceeds via a large-scale structural reorganization of the product.

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Organizational Affiliation: 

Division of Biological Science, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
macrophomate synthase intermolecular Diels-Alderase	A	339	Macrophoma commelinae	Mutation(s): 1
Find proteins for Q9UVD4 (Macrophoma commelinae) Go to UniProtKB:  Q9UVD4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PYR	A	PYRUVIC ACID C3 H4 O3 LCTONWCANYUPML-UHFFFAOYSA-N
MG	A	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.7 Å
• R-Value Free: 0.203 
• R-Value Work: 0.176 
• Space Group: P 6₃ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 106.678	α = 90.00
b = 106.678	β = 90.00
c = 120.755	γ = 120.00

Software Package:

Software Name	Purpose
SCALA	data scaling
SHARP	phasing
CCP4	data scaling
MOSFLM	data reduction
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-10-01 
• Released Date: 2003-04-01 
• Deposition Author(s): Ose, T., Watanabe, K., Mie, T., Honma, M., Watanabe, H., Yao, M., Oikawa, H., Tanaka, I.

Revision History 

• Version 1.0: 2003-04-01
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Derived calculations, Version format compliance