Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 203.71 kDa 
• Atom Count: 12351 
• Modelled Residue Count: 1630 
• Deposited Residue Count: 1868 
• Unique protein chains: 1

1DQ9

COMPLEX OF CATALYTIC PORTION OF HUMAN HMG-COA REDUCTASE WITH HMG-COA

• DOI: 10.2210/pdb1DQ9/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1999-12-30 Released: 2000-03-08 
• Deposition Author(s): Istvan, E.S., Palnitkar, M., Buchanan, S.K., Deisenhofer, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.247 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 

Literature

Crystal structure of the catalytic portion of human HMG-CoA reductase: insights into regulation of activity and catalysis.

Istvan, E.S., Palnitkar, M., Buchanan, S.K., Deisenhofer, J.

(2000) EMBO J 19: 819-830

• PubMed: 10698924 
• DOI: 10.1093/emboj/19.5.819
• Primary Citation of Related Structures:  
  1DQ9, 1DQ8, 1DQA


• PubMed Abstract: 
  

3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) catalyzes the formation of mevalonate, the committed step in the biosynthesis of sterols and isoprenoids. The activity of HMGR is controlled through synthesis, degradation and phosphorylation to maintain the concentration of mevalonate-derived products. In addition to the physiological regulation of HMGR, the human enzyme has been targeted successfully by drugs in the clinical treatment of high serum cholesterol levels. Three crystal structures of the catalytic portion of human HMGR in complexes with HMG-CoA, with HMG and CoA, and with HMG, CoA and NADP(+), provide a detailed view of the enzyme active site. Catalytic portions of human HMGR form tight tetramers. The crystal structure explains the influence of the enzyme's oligomeric state on the activity and suggests a mechanism for cholesterol sensing. The active site architecture of human HMGR is different from that of bacterial HMGR; this may explain why binding of HMGR inhibitors to bacterial HMGRs has not been reported.

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Organizational Affiliation: 

Howard Hughes Medical Institute, Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas, TX 75235-9050, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (HMG-COA REDUCTASE)	A, B, C, D	467	Homo sapiens	Mutation(s): 1  Gene Names: HMGCR EC: 1.1.1.34
Find proteins for P04035 (Homo sapiens) Explore P04035  Go to UniProtKB:  P04035
NIH Common Fund Data Resources
PHAROS:  P04035 GTEx:  ENSG00000113161

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HMG	A, B, C, D	3-HYDROXY-3-METHYLGLUTARYL-COENZYME A C27 H39 N7 O20 P3 S CABVTRNMFUVUDM-VRHQGPGLSA-I

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.247 
• R-Value Work: 0.207 
• R-Value Observed: 0.207 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.58	α = 90
b = 171.2	β = 116.59
c = 80.37	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-12-30 
• Released Date: 2000-03-08 
Deposition Author(s): Istvan, E.S., Palnitkar, M., Buchanan, S.K., Deisenhofer, J.

Revision History  

• Version 1.0: 2000-03-08
  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: 2018-03-14
  Changes: Database references