Abstract:
:Coumarins constitute a general and totally new class of inhibitors of the zinc enzyme carbonic anhydrase (CA, EC 4.2.1.1), binding at the entrance of the active site cavity. We report here that the coumarin-binding site in CAs may interact with diverse compounds, such as the antiepileptic drug lacosamide, which inhibits mammalian CAs I-XV, with inhibition constants in range of 331 nM to 4.56 microM. Its X-ray crystal structure in adduct with CA II reveals the molecular basis for this inhibition. Lacosamide was found in the coumarin-binding site, making favorable van der Waals interactions with Thr200, Asn67, Gln92, and Phe131. No interactions with the Zn(II) ion were evidenced in the CA II-lacosamide adduct. The coumarin-binding site may thus accommodate structurally diverse compounds which possess an inhibition mechanism distinct of that of sulfonamides. This finding opens new possibilities for designing CA inhibitors/activators with various biomedical applications.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Temperini C,Innocenti A,Scozzafava A,Parkkila S,Supuran CTdoi
10.1021/jm901524fsubject
Has Abstractpub_date
2010-01-28 00:00:00pages
850-4issue
2eissn
0022-2623issn
1520-4804journal_volume
53pub_type
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