Abstract:
:The X-ray crystal structures of 5-amino-1,3,4-thiadiazole-2-sulfonamide (the acetazolamide precursor) and 5-(4-amino-3-chloro-5-fluorophenylsulfonamido)-1,3,4-thiadiazole-2-sulfonamide in complex with the human isozyme II of carbonic anhydrase (CA, EC 4.2.1.1) are reported. The thiadiazole-sulfonamide moiety of the two compounds binds in the canonic manner to the zinc ion and interacts with Thr199, Glu106, and Thr200. The substituted phenyl tail of the second inhibitor was positioned in the hydrophobic part of the binding pocket, at van der Waals distance from Phe131, Val 135, Val141, Leu198, Pro202, and Leu204. These structures may help in the design of better inhibitors of these widespread zinc-containing enzymes.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Menchise V,De Simone G,Di Fiore A,Scozzafava A,Supuran CTdoi
10.1016/j.bmcl.2006.09.022subject
Has Abstractpub_date
2006-12-15 00:00:00pages
6204-8issue
24eissn
0960-894Xissn
1464-3405pii
S0960-894X(06)01084-5journal_volume
16pub_type
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