3ZNC

MURINE CARBONIC ANHYDRASE IV COMPLEXED WITH BRINZOLAMIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures of murine carbonic anhydrase IV and human carbonic anhydrase II complexed with brinzolamide: molecular basis of isozyme-drug discrimination.

Stams, T.Chen, Y.Boriack-Sjodin, P.A.Hurt, J.D.Liao, J.May, J.A.Dean, T.Laipis, P.Silverman, D.N.Christianson, D.W.

(1998) Protein Sci 7: 556-563

  • DOI: 10.1002/pro.5560070303
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Carbonic anhydrase IV (CAIV) is a membrane-associated enzyme anchored to plasma membrane surfaces by a phosphatidylinositol glycan linkage. We have determined the 2.8-angstroms resolution crystal structure of a truncated, soluble form of recombinant ...

    Carbonic anhydrase IV (CAIV) is a membrane-associated enzyme anchored to plasma membrane surfaces by a phosphatidylinositol glycan linkage. We have determined the 2.8-angstroms resolution crystal structure of a truncated, soluble form of recombinant murine CAIV. We have also determined the structure of its complex with a drug used for glaucoma therapy, the sulfonamide inhibitor brinzolamide (Azopt). The overall structure of murine CAIV is generally similar to that of human CAIV; however, some local structural differences are found in the active site resulting from amino acid sequence differences in the "130's segment" and the residue-63 loop (these may affect the nearby catalytic proton shuttle, His-64). Similar to human CAIV, the C-terminus of murine CAIV is surrounded by a substantial electropositive surface potential that may stabilize the interaction with the phospholipid membrane. Binding interactions observed for brinzolamide rationalize the generally weaker affinity of inhibitors used in glaucoma therapy toward CAIV compared with CAII.


    Related Citations: 
    • Crystal Structure of the Secretory Form of Membrane-Associated Human Carbonic Anhydrase Iv at 2.8-A Resolution
      Stams, T., Nair, S.K., Okuyama, T., Waheed, A., Sly, W.S., Christianson, D.W.
      (1996) Proc Natl Acad Sci U S A 93: 13589

    Organizational Affiliation

    Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia 19104-6323, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBONIC ANHYDRASE IV
A
258Mus musculusMutation(s): 0 
Gene Names: MURINE CAIVCa4Car4
EC: 4.2.1.1
Find proteins for Q64444 (Mus musculus)
Go to UniProtKB:  Q64444
NIH Common Fund Data Resources
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BZ1
Query on BZ1

Download CCD File 
A
(+)-4-ETHYLAMINO-3,4-DIHYDRO-2-(METHOXY)PROPYL-2H-THIENO[3,2-E]-1,2-THIAZINE-6-SULFONAMIDE-1,1-DIOXIDE
C12 H21 N3 O5 S3
HCRKCZRJWPKOAR-JTQLQIEISA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BZ1IC50 :  45.29999923706055   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.5α = 90
b = 85.2β = 90
c = 121.9γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
X-PLORmodel building
X-PLORrefinement
CCP4data scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-03-23
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance