A β-carbonic anhydrases (CAs, EC 4.2.1.1) was recently cloned, purified and characterized kinetically in the pathogen Clostridium perfringens. We report here the first inhibition study of this enzyme (CpeCA). CpeCA was poorly inhibited by iodide and bromide, and was inhibited with KIs in the range of 1-10mM by a range of anions such as (thio)cyanate, azide, bicarbonate, nitrate, nitrite, hydrogensulfite, hydrogensulfide, stannate, tellurate, pyrophosphate, divanadate, tetraborate, peroxydisulfate, sulfate, iminodisulfonate and fluorosulfonate. Better inhibitory power, with K(I)s of 0.36-1.0 mM, was observed for cyanide, carbonate, selenate, selenocyanide, trithiocarbonate and diethyldithiocarbamate, whereas the best CpeCA inhibitors were sulfamate, sulfamide, phenylboronic acid and phenylarsonic acid, which had KIs in the range of 7-75 μM. This study thus provides the basis for developing better clostridial enzyme inhibitors with potential as antiinfectives with a new mechanism of action.
Anion inhibition studies of a β-carbonic anhydrase from Clostridium perfringens / D. Vullo;R. S. Sai;A. Scozzafava;C. Capasso;J. G. Ferry;C. T. Supuran. - In: BIOORGANIC & MEDICINAL CHEMISTRY LETTERS. - ISSN 0960-894X. - STAMPA. - 23:(2013), pp. 6706-6710. [10.1016/j.bmcl.2013.10.037]
Anion inhibition studies of a β-carbonic anhydrase from Clostridium perfringens.
VULLO, DANIELA;SCOZZAFAVA, ANDREA;SUPURAN, CLAUDIU TRANDAFIR
2013
Abstract
A β-carbonic anhydrases (CAs, EC 4.2.1.1) was recently cloned, purified and characterized kinetically in the pathogen Clostridium perfringens. We report here the first inhibition study of this enzyme (CpeCA). CpeCA was poorly inhibited by iodide and bromide, and was inhibited with KIs in the range of 1-10mM by a range of anions such as (thio)cyanate, azide, bicarbonate, nitrate, nitrite, hydrogensulfite, hydrogensulfide, stannate, tellurate, pyrophosphate, divanadate, tetraborate, peroxydisulfate, sulfate, iminodisulfonate and fluorosulfonate. Better inhibitory power, with K(I)s of 0.36-1.0 mM, was observed for cyanide, carbonate, selenate, selenocyanide, trithiocarbonate and diethyldithiocarbamate, whereas the best CpeCA inhibitors were sulfamate, sulfamide, phenylboronic acid and phenylarsonic acid, which had KIs in the range of 7-75 μM. This study thus provides the basis for developing better clostridial enzyme inhibitors with potential as antiinfectives with a new mechanism of action.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.