ISDA

Deposition Date 2014-10-07

Release Date 2015-02-04

Last Version Date 2023-09-20

Entry Detail

PDB ID:

4RIU

Keywords:

Lyase/Lyase inhibitor

Title:

A Carbonic Anhydrase IX Mimic in Complex with a Saccharin-Based Inhibitor

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.65 Å

R-Value Free:

0.17

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Carbonic anhydrase 2
Gene (Uniprot):CA2
Mutations:A65S, N67Q, E69T, I91L, F131V, K170E, L204A
Chain IDs:A
Chain Length:260
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P00918 Pfam ID:PF00194 EC:4.2.1.1

Ligand Molecules

3QR

GOL

Primary Citation

Saccharin: A lead compound for structure-based drug design of carbonic anhydrase IX inhibitors.

Mahon, B.P, Hendon, A.M, Driscoll, J.M, Rankin, G.M, Poulsen, S.A, Supuran, C.T, McKenna, R.Show

Bioorg.Med.Chem. 23 849 854 (2015)

PMID: 25614109 DOI: 10.1016/j.bmc.2014.12.030

Abstact

Carbonic anhydrase IX (CA IX) is a key modulator of aggressive tumor behavior and a prognostic marker and target for several cancers. Saccharin (SAC) based compounds may provide an avenue to overcome CA isoform specificity, as they display both nanomolar affinity and preferential binding, for CA IX compared to CA II (>50-fold for SAC and >1000-fold when SAC is conjugated to a carbohydrate moiety). The X-ray crystal structures of SAC and a SAC-carbohydrate conjugate bound to a CA IX-mimic are presented and compared to CA II. The structures provide substantial new insight into the mechanism of SAC selective CA isoform inhibition.

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Primary Citation of related structures