Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.67 kDa 
• Atom Count: 2338 
• Modelled Residue Count: 257 
• Deposited Residue Count: 260 
• Unique protein chains: 1

2POW

The crystal structure of the human carbonic anhydrase II in complex with 4-amino-6-trifluoromethyl-benzene-1,3-disulfonamide

• PDB DOI: 10.2210/pdb2POW/pdb

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


• Deposited: 2007-04-27 Released: 2007-07-24 
• Deposition Author(s): Alterio, V., De Simone, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.212 
• R-Value Work: 0.184 

Literature

Carbonic anhydrase inhibitors: Inhibition of human, bacterial, and archaeal isozymes with benzene-1,3-disulfonamides-Solution and crystallographic studies.

Alterio, V., De Simone, G., Monti, S.M., Scozzafava, A., Supuran, C.T.

(2007) Bioorg Med Chem Lett 17: 4201-4207

• PubMed: 17540563 
• DOI: 10.1016/j.bmcl.2007.05.045
• Primary Citation of Related Structures:  
  2POU, 2POV, 2POW


• PubMed Abstract: 
  

Three benzene-1,3-disulfonamide derivatives were investigated for their interaction with 12 mammalian alpha-carbonic anhydrases (CAs, EC 4.2.1.1), and three bacterial/archaeal CAs belonging to the alpha-, beta-, and gamma-CA class, respectively. X-ray crystal structure of the three inhibitors in complex with the dominant human isozyme CA II revealed a particular binding mode within the cavity. The sulfonamide group in meta-position to the Zn(2+)-coordinated SO(2)NH(2) moiety was oriented toward the hydrophilic side of the active site cleft, establishing hydrogen bonds with His64, Asn67, Gln92, and Thr200. The plane of the phenyl moiety of the inhibitors was rotated by 45 degrees and tilted by 10 degrees with respect to its most recurrent orientation in other CA II-sulfonamide complexes.

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Organizational Affiliation: 

Istituto di Biostrutture e Bioimmagini-CNR, via Mezzocannone 16, 80134 Naples, Italy.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carbonic anhydrase 2	A	260	Homo sapiens	Mutation(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

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
I7C	C [auth A]	4-AMINO-6-(TRIFLUOROMETHYL)BENZENE-1,3-DISULFONAMIDE C7 H8 F3 N3 O4 S2 KRVABEGPNKGLOT-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
I7C	Binding MOAD:  2POW	Ki: 63 (nM) from 1 assay(s)
	BindingDB:  2POW	Ki: min: 62, max: 6.30e+4 (nM) from 3 assay(s)
		IC50: 340 (nM) from 1 assay(s)
	PDBBind:  2POW	Ki: 63 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.212 
• R-Value Work: 0.184 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.98	α = 90
b = 41.4	β = 104.23
c = 72.03	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-04-27 
• Released Date: 2007-07-24 
Deposition Author(s): Alterio, V., De Simone, G.

Revision History  

• Version 1.0: 2007-07-24
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance