Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.194 

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This is version 1.4 of the entry. See complete history


Three-dimensional structures of the three human class I alcohol dehydrogenases.

Niederhut, M.S.Gibbons, B.J.Perez-Miller, S.Hurley, T.D.

(2001) Protein Sci 10: 697-706

  • DOI: https://doi.org/10.1110/ps.45001
  • Primary Citation of Related Structures:  
    1HSO, 1HSZ, 1HT0

  • PubMed Abstract: 

    In contrast with other animal species, humans possess three distinct genes for class I alcohol dehydrogenase and show polymorphic variation in the ADH1B and ADH1C genes. The three class I alcohol dehydrogenase isoenzymes share approximately 93% sequence identity but differ in their substrate specificity and their developmental expression. We report here the first three-dimensional structures for the ADH1A and ADH1C*2 gene products at 2.5 and 2.0 A, respectively, and the structure of the ADH1B*1 gene product in a binary complex with cofactor at 2.2 A. Not surprisingly, the overall structure of each isoenzyme is highly similar to the others. However, the substitution of Gly for Arg at position 47 in the ADH1A isoenzyme promotes a greater extent of domain closure in the ADH1A isoenzyme, whereas substitution at position 271 may account for the lower turnover rate for the ADH1C*2 isoenzyme relative to its polymorphic variant, ADH1C*1. The substrate-binding pockets of each isoenzyme possess a unique topology that dictates each isoenzyme's distinct but overlapping substrate preferences. ADH1*B1 has the most restrictive substrate-binding site near the catalytic zinc atom, whereas both ADH1A and ADH1C*2 possess amino acid substitutions that correlate with their better efficiency for the oxidation of secondary alcohols. These structures describe the nature of their individual substrate-binding pockets and will improve our understanding of how the metabolism of beverage ethanol affects the normal metabolic processes performed by these isoenzymes.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202-5122, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
374Homo sapiensMutation(s): 0 
Gene Names: ADH2 OR ADH1B*1
UniProt & NIH Common Fund Data Resources
Find proteins for P00325 (Homo sapiens)
Explore P00325 
Go to UniProtKB:  P00325
PHAROS:  P00325
GTEx:  ENSG00000196616 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00325
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.194 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.9α = 79.9
b = 53.4β = 89.5
c = 90.2γ = 69.3
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-10
    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: 2018-04-04
    Changes: Data collection
  • Version 1.4: 2023-08-09
    Changes: Data collection, Database references, Derived calculations, Refinement description