1XEG

Crystal structure of human carbonic anhydrase II complexed with an acetate ion


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A novel acetate-bound complex of human carbonic anhydrase II.

Mazumdar, P.A.Kumaran, D.Swaminathan, S.Das, A.K.

(2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 163-166

  • DOI: https://doi.org/10.1107/S1744309108002078
  • Primary Citation of Related Structures:  
    1XEG

  • PubMed Abstract: 

    The enzyme human carbonic anhydrase II (hCAII) crystallized in an acetate-bound complex belonging to space group P2(1)2(1)2(1), with unit-cell parameters a = 42.3, b = 71.8, c = 74.0 A. The structure was solved by the molecular-replacement method and refined to an R value of 0.18 and an R(free) of 0.21. The acetate molecule replaced the zinc-bound water molecule in the structure, differing from previous reports regarding the site of acetate binding. This mode of binding disrupts the hydrogen-bonded solvent network required for activity of the enzyme. This mode of inhibitor binding is a novel one that has not been observed previously.


  • Organizational Affiliation

    Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Carbonic anhydrase II260Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens)
Explore P00918 
Go to UniProtKB:  P00918
PHAROS:  P00918
GTEx:  ENSG00000104267 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
ACT BindingDB:  1XEG Ki: 1.30e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.312α = 90
b = 71.749β = 90
c = 74.01γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
HKL-2000data reduction
MOLREPphasing
CNSrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-09-27
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations