6XXT image
Entry Detail
PDB ID:
6XXT
Keywords:
Title:
The crystal structure of hCA II in complex with a 4-(4-aroylpiperazine-1-carbonyl)benzenesulfonamide derivative.
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-01-28
Release Date:
2020-06-03
Method Details:
Experimental Method:
Resolution:
1.05 Å
R-Value Free:
0.14
R-Value Work:
0.13
R-Value Observed:
0.13
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Carbonic anhydrase 2
Chain IDs:A (auth: X)
Chain Length:262
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Looking toward the Rim of the Active Site Cavity of Druggable Human Carbonic Anhydrase Isoforms.
Acs Med.Chem.Lett. 11 1000 1005 (2020)
PMID: 32435417 DOI: 10.1021/acsmedchemlett.0c00062

Abstact

We report the synthesis and biochemical evaluation of a series of substituted 4-(4-aroylpiperazine-1-carbonyl)benzenesulfonamides (5a-s) developed as inhibitors of druggable carbonic anhydrase (CA) isoforms, as tools for the identification of new therapeutics. X-ray crystallography confirmed that this class of benzenesulfonamides binds CAs through the canonical anchoring of the benzenesulfonamide moiety to the metal ion and a tail-mediated recognition of the middle/top area of the active site cavity. Compound 5e (R = 2-Cl) demonstrated relevant selectivity toward brain-expressed hCA VII. The best balancing in binding affinity and selectivity toward tumor-expressed hCA IX/hCA XII over ubiquitous hCA I/hCA II was found for inhibitor 5o (R = 3-NO2). Notably 5b (R = 2-F) proved to be the most efficacious inhibitor of hCA XII for which computational studies elucidated the CA recognition process.

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