3NB5 image
Deposition Date 2010-06-02
Release Date 2011-04-20
Last Version Date 2023-11-01
Entry Detail
PDB ID:
3NB5
Title:
Human carbonic anhydrase II in complex with 2-(3-chloro-4-hydroxyphenyl)-N-(4-sulfamoylphenethyl)acetamide
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.20
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Carbonic anhydrase 2
Gene (Uniprot):CA2
Chain IDs:A
Chain Length:260
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Natural Product-Based Phenols as Novel Probes for Mycobacterial and Fungal Carbonic Anhydrases
J.Med.Chem. 54 1682 1692 (2011)
PMID: 21332115 DOI: 10.1021/jm1013242

Abstact

In order to discover novel probes that may help in the investigation and control of infectious diseases through a new mechanism of action, we have evaluated a library of phenol-based natural products (NPs) for enzyme inhibition against four recently characterized pathogen β-family carbonic anhydrases (CAs). These include CAs from Mycobacterium tuberculosis, Candida albicans, and Cryptococcus neoformans as well as α-family human CA I and CA II for comparison. Many of the NPs selectively inhibited the mycobacterial and fungal β-CAs, with the two best performing compounds displaying submicromolar inhibition with a preference for fungal over human CA inhibition of more than 2 orders of magnitude. These compounds provide the first example of non-sulfonamide inhibitors that display β over α CA enzyme selectivity. Structural characterization of the library compounds in complex with human CA II revealed a novel binding mode whereby a methyl ester interacts via a water molecule with the active site zinc.

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Primary Citation of related structures