ISDA: 4BCW

Deposition Date 2012-10-03

Release Date 2013-02-06

Last Version Date 2023-12-20

Entry Detail

PDB ID:

4BCW

Keywords:

LYASE

Title:

Carbonic anhydrase IX mimic in complex with (E)-2-(5-bromo-2- hydroxyphenyl)ethenesulfonic acid

Biological Source:

Source Organism:

HOMO SAPIENS (Taxon ID: 9606)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.50 Å

R-Value Free:

0.21

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 1 21 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:CARBONIC ANHYDRASE 2
Gene (Uniprot):CA2
Mutagens:YES
Chain IDs:A
Chain Length:257
Number of Molecules:1
Biological Source:HOMO SAPIENS

UniProt ID:P00918 Pfam ID:PF00194 EC:4.2.1.1

Ligand Molecules

TU0

Primary Citation

Sulfocoumarins (1,2-Benzoxathiine-2,2-Dioxides): A Class of Potent and Isoform-Selective Inhibitors of Tumor-Associated Carbonic Anhydrases.

Tars, K, Vullo, D, Kazaks, A, Leitans, J, Lends, A, Grandane, A, Zalubovskis, R, Scozzafava, A, Supuran, C.T.Show

J.Med.Chem. 56 293 ? (2013)

PMID: 23241068 DOI: 10.1021/JM301625S

Abstact

Coumarins were recently shown to constitute a novel class of mechanism-based carbonic anhydrase (CA, EC 4.2.1.1) inhibitors. We demonstrate that sulfocoumarins (1,2-benzoxathiine 2,2-dioxides) possess a similar mechanism of action, acting as effective CA inhibitors. The sulfocoumarins were hydrolyzed by the esterase CA activity to 2-hydroxyphenyl-vinylsulfonic acids, which thereafter bind to the enzyme in a region rarely occupied by other classes of inhibitors. The X-ray structure of one of these compounds in adduct with a modified CA II enzyme possessing two amino acid residues from the CA IX active site, allowed us to decipher the inhibition mechanism. The sulfonic acid was observed anchored to the zinc-coordinated water molecule, making favorable interactions with Thr200 and Pro201. Some other sulfocoumarins incorporating substituted-1,2,3-triazole moieties were prepared by using click chemistry and showed low nanomolar inhibitory action against the tumor-associated isoforms CA IX and XII, being less effective against the cytosolic CA I and II.

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Primary Citation of related structures

Abstact

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