Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

 3D View: Structure | Ligand Interaction

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Protein Workshop | Ligand Explorer

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

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 92852.53 
• Atom Count: 6036 
• Residue Count: 856 
• Unique protein chains: 1

1QAX

TERNARY COMPLEX OF PSEUDOMONAS MEVALONII HMG-COA REDUCTASE WITH HMG-COA AND NAD+

• DOI: 10.2210/pdb1QAX/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Pseudomonas mevalonii
• Expression System: Escherichia coli


• Deposited: 1999-04-06 Released: 1999-06-18 
• Deposition Author(s): Tabernero, L., Bochar, D.A., Rodwell, V.W., Stauffacher, C.V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.267 
• R-Value Work: 0.215 

Literature

Substrate-induced closure of the flap domain in the ternary complex structures provides insights into the mechanism of catalysis by 3-hydroxy-3-methylglutaryl-CoA reductase.

Tabernero, L., Bochar, D.A., Rodwell, V.W., Stauffacher, C.V.

(1999) Proc.Natl.Acad.Sci.USA 96: 7167-7171

• PubMed: 10377386 
• DOI: 10.1073/pnas.96.13.7167
• Primary Citation of Related Structures:  
  1QAY


• PubMed Abstract: 
  

3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase is the rate-limiting enzyme and the first committed step in the biosynthesis of cholesterol in mammals. We have determined the crystal structures of two nonproductive ternary complexes of HMG-CoA reductase, HMG-CoA/NAD+ and mevalonate/NADH, at 2.8 A resolution. In the structure of the Pseudomonas mevalonii apoenzyme, the last 50 residues of the C terminus (the flap domain), including the catalytic residue His381, were not visible. The structures of the ternary complexes reported here reveal a substrate-induced closing of the flap domain that completes the active site and aligns the catalytic histidine proximal to the thioester of HMG-CoA. The structures also present evidence that Lys267 is critically involved in catalysis and provide insights into the catalytic mechanism.

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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROTEIN (3-HYDROXY-3-METHYLGLUTARYL-COENZYME A REDUCTASE)	A, B	428	Pseudomonas mevalonii	Mutation(s): 0  Gene Names: mvaA EC: 1.1.1.88
Find proteins for P13702 (Pseudomonas mevalonii) Go to UniProtKB:  P13702

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HMG	A	3-HYDROXY-3-METHYLGLUTARYL-COENZYME A (S)-HMG-COA C27 H39 N7 O20 P3 S CABVTRNMFUVUDM-VRHQGPGLSA-I
NAD	B	NICOTINAMIDE-ADENINE-DINUCLEOTIDE C21 H27 N7 O14 P2 BAWFJGJZGIEFAR-NNYOXOHSSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.267 
• R-Value Work: 0.215 
• Space Group: I 4₁ 3 2

Unit Cell:

Length (Å)	Angle (°)
a = 228.700	α = 90.00
b = 228.700	β = 90.00
c = 228.700	γ = 90.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
DENZO	data reduction
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-04-06 
• Released Date: 1999-06-18 
• Deposition Author(s): Tabernero, L., Bochar, D.A., Rodwell, V.W., Stauffacher, C.V.

Revision History 

• Version 1.0: 1999-06-18
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-04
  Type: Refinement description