3TMJ

Joint X-ray/neutron structure of human carbonic anhydrase II at pH 7.8


Experimental Data Snapshot

  • Method: NEUTRON DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.280 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Neutron Structure of Human Carbonic Anhydrase II: A Hydrogen-Bonded Water Network "Switch" Is Observed between pH 7.8 and 10.0.

Fisher, Z.Kovalevsky, A.Y.Mustyakimov, M.Silverman, D.N.McKenna, R.Langan, P.

(2011) Biochemistry 50: 9421-9423

  • DOI: 10.1021/bi201487b

  • PubMed Abstract: 
  • The neutron structure of wild-type human carbonic anhydrase II at pH 7.8 has been determined to 2.0 Å resolution. Detailed analysis and comparison to the previously determined structure at pH 10.0 show important differences in the protonation of key ...

    The neutron structure of wild-type human carbonic anhydrase II at pH 7.8 has been determined to 2.0 Å resolution. Detailed analysis and comparison to the previously determined structure at pH 10.0 show important differences in the protonation of key catalytic residues in the active site as well as a rearrangement of the H-bonded water network. For the first time, a completed H-bonded network stretching from the Zn-bound solvent to the proton shuttling residue, His64, has been directly observed.


    Organizational Affiliation

    Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States. zfisher@lanl.gov




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
258Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens)
Go to Gene View: CA2
Go to UniProtKB:  P00918
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
DOD
Query on DOD

Download SDF File 
Download CCD File 
A
DEUTERATED WATER
D2 O
XLYOFNOQVPJJNP-ZSJDYOACSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: NEUTRON DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.280 
Software Package:
Software NamePurpose
d*TREKdata reduction
nCNSphasing
d*TREKdata scaling
nCNSrefinement
SCALAdata scaling
PCSdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-08-31 
  • Released Date: 2011-11-09 
  • Deposition Author(s): Fisher, Z.

Revision History 

  • Version 1.0: 2011-11-09
    Type: Initial release
  • Version 1.1: 2017-11-08
    Type: Refinement description
  • Version 1.2: 2018-04-25
    Type: Data collection
  • Version 1.3: 2018-06-13
    Type: Data collection