Carbonic anhydrase inhibitors. Inhibition studies with anions and sulfonamides of a new cytosolic enzyme from the scleractinian coral Stylophora pistillata

Bioorg Med Chem Lett. 2011 Jan 15;21(2):710-4. doi: 10.1016/j.bmcl.2010.11.124. Epub 2010 Dec 4.


The catalytic activity and the inhibition of a new coral carbonic anhydrase (CA, EC, from the scleractinian coral Stylophora pistillata, STPCA-2, has been investigated. STPCA-2 has high catalytic activity for the physiological reaction being less sensitive to anion and sulfonamide inhibitors compared to STPCA, a coral enzyme previously described. The best STPCA-2 anion inhibitors were sulfamide, sulfamic acid, phenylboronic acid, and phenylarsonic acid (K(I)s of 5.7-67.2μM) whereas the best sulfonamide inhibitors were acetazolamide and dichlorophenamide (K(I)s of 74-79nM). Because this discriminatory effect between these two coral CAs, sulfonamides may be useful to better understand the physiological role of STPCA and STPCA-2 in corals and biomineralization processes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Anions / chemistry
  • Anions / pharmacology
  • Anthozoa / enzymology*
  • Carbonic Anhydrase Inhibitors / chemistry*
  • Carbonic Anhydrase Inhibitors / pharmacology*
  • Carbonic Anhydrases / metabolism*
  • Humans
  • Structure-Activity Relationship
  • Sulfonamides / chemistry*
  • Sulfonamides / pharmacology*


  • Anions
  • Carbonic Anhydrase Inhibitors
  • Sulfonamides
  • Carbonic Anhydrases