1BCD | pdb_00001bcd

X-RAY CRYSTALLOGRAPHIC STRUCTURE OF A COMPLEX BETWEEN HUMAN CARBONIC ANHYDRASE II AND A NEW TOPICAL INHIBITOR, TRIFLUOROMETHANE SULPHONAMIDE

• PDB DOI: https://doi.org/10.2210/pdb1BCD/pdb

• Classification: LYASE(OXO-ACID)
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1993-08-31 Released: 1993-10-31 
• Deposition Author(s): Hakansson, K., Liljas, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 
  0.151 (DCC) 
• R-Value Observed: 
  0.154 (Depositor) 

Literature

The structure of a complex between carbonic anhydrase II and a new inhibitor, trifluoromethane sulphonamide.

Hakansson, K., Liljas, A.

(1994) FEBS Lett 350: 319-322

• PubMed: 8070585 
• DOI: https://doi.org/10.1016/0014-5793(94)00798-5
• Primary Citation Related Structures: 
  1BCD


• PubMed Abstract: 
  

  It has recently been shown that aliphatic sulphonamides are good inhibitors of carbonic anhydrase (CA) provided that the pK of the sulphonamide is low. We have determined the structure of the complex between CAII and CF3SO2NH2 by X-ray crystallographic methods. The nitrogen of the sulphonamide is bound to the zinc ion of the enzyme in the usual manner. The other parts of the inhibitor show a different mode of binding from aromatic sulphonamides since the trifluoromethyl group is bound at the hydrophobic part of the active site instead of pointing out from the active site. It should be possible to design new inhibitors specific for the different isoenzymes, starting from the present structure.

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Organizational Affiliation: 
• Department of Molecular Biophysics, University of Lund, Sweden.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 29.37 kDa 
• Atom Count: 2,303 
• Modeled Residue Count: 258 
• Deposited Residue Count: 259 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBONIC ANHYDRASE II	A	259	Homo sapiens	Mutation(s): 0  EC: 4.2.1.1 (PDB Primary Data), 4.2.1.69 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens) Explore P00918  Go to UniProtKB:  P00918
PHAROS:  P00918 GTEx:  ENSG00000104267

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMS	C [auth A]	TRIFLUOROMETHANE SULFONAMIDE C H2 F3 N O2 S KAKQVSNHTBLJCH-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work:  0.151 (DCC) 
• R-Value Observed: 0.154 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.7	α = 90
b = 41.7	β = 104.6
c = 73	γ = 90

Software Package:

Software Name	Purpose
PROFFT	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1993-10-31 
Deposition Author(s): Hakansson, K., Liljas, A.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Derived calculations