1QAX

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.194 

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This is version 1.3 of the entry. See complete history. 


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 U S A 96: 7167-7171

  • DOI: 10.1073/pnas.96.13.7167
  • Primary Citation of Related Structures:  
    1QAX, 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 red ...

    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.

    Organizational Affiliation: 

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



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (3-HYDROXY-3-METHYLGLUTARYL-COENZYME A REDUCTASE)A, B428Pseudomonas mevaloniiMutation(s): 0 
Gene Names: mvaA
EC: 1.1.1.88
Find proteins for P13702 (Pseudomonas mevalonii)
Explore P13702 
Go to UniProtKB:  P13702
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HMG
Query on HMG
Download CCD File 
A
3-HYDROXY-3-METHYLGLUTARYL-COENZYME A
C27 H39 N7 O20 P3 S
CABVTRNMFUVUDM-VRHQGPGLSA-I		 Ligand Interaction
NAD
Query on NAD
Download CCD File 
B
NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.194 
  • Space Group: I 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 228.7α = 90
b = 228.7β = 90
c = 228.7γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORrefinement

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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