Carbonic anhydrase inhibitors. Interaction of the antitumor sulfamate EMD 486019 with twelve mammalian carbonic anhydrase isoforms: Kinetic and X-ray crystallographic studies.
The new antitumor sulfamate EMD 486019 was investigated for its interaction with twelve catalytically active mammalian carbonic anhydrase (CA, EC 4.2.1.1) isozymes, hCA I - XIV. Similarly to 667-Coumate, a structurally related compound in phase II clinical trials as steroid sulfatase/CA inhibitor with potent antitumor properties, EMD 486019 acts as a strong inhibitor of isozymes CA II, VB, VII, IX, XII, and XIV (K(I)s in the range of 13-19nM) being less effective against other isozymes (K(I)s in the range of 66-3600nM against hCA I, IV, VA, VI, and mCA XIII, respectively). The complete inhibition profile of 667-Coumate against these mammalian CAs is also reported here for the first time. Comparing the X-ray crystal structures of the two adducts of CA II with EMD 486019 and 667-Coumate, distinct orientations of the bound sulfamates within the enzyme cavity were observed, which account for their distinct inhibition profiles. CA II/IX potent inhibitors belonging to the sulfamate class are thus valuable clinical candidates with potential for development as antitumor agents with a multifactorial mechanism of action.
Temperini
Claudia
C
Università degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Rm. 188, Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy.
Innocenti
Alessio
A
Scozzafava
Andrea
A
Supuran
Claudiu T
CT
D000818:Animals; D002257:Carbonic Anhydrase Inhibitors / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*; D002256:Carbonic Anhydrases / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D003374:Coumarins / Q000494:pharmacology; D018360:Crystallography, X-Ray; D015195:Drug Design; D006801:Humans; D007527:Isoenzymes / Q000378:metabolism; D051379:Mice; D008968:Molecular Conformation; D015394:Molecular Structure; D013449:Sulfonamides / Q000494:pharmacology; D013451:Sulfonic Acids / Q000138:chemical synthesis* / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology*
D002257:Carbonic Anhydrase Inhibitors; D003374:Coumarins; C530568:EMD 486019; D007527:Isoenzymes; D013449:Sulfonamides; D013451:Sulfonic Acids; C520511:irosustat; D002256:Carbonic Anhydrases