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Tamiika K. Hurst Da Wang Richard B. Thompson Carol A. Fierke 《Biochimica et Biophysica Acta - Proteins and Proteomics》2010,1804(2):393-403
Carbonic anhydrases are archetypical zinc metalloenzymes and as such, they have been developed as the recognition element of a family of fluorescent indicators (sensors) to detect metal ions, particularly Zn2+ and Cu2+. Subtle modification of the structure of human carbonic anhydrase II isozyme (CAII) alters the selectivity, sensitivity, and response time for these sensors. Sensors using CAII variants coupled with zinc-dependent fluorescent ligands demonstrate picomolar sensitivity, unmatched selectivity, ratiometric fluorescence signal, and near diffusion-controlled response times. Recently, these sensors have been applied to measuring the readily exchangeable concentrations of zinc in the cytosol and nucleus of mammalian tissue culture cells and concentrations of free Cu2+ in seawater. 相似文献
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Gabriela Laura Almajan Stefania-Felicia Barbuceanu Alessio innocenti Andrea Scozzafava Claudiu T. Supuran 《Journal of enzyme inhibition and medicinal chemistry》2013,28(1):101-107
Novel mercapto-1,3,4-oxadiazole and -1,2,4-triazole derivatives were synthesized by various pathways starting from 4-(4-halogeno-phenylsulfonyl)benzoic acid hydrazides which were reacted with carbon disulfide or isothiocyanates. The heterocyclic mercaptans prepared in this way were assayed as inhibitors of three physiologically relevant isoforms of the zinc enzyme carbonic anhydrase (CA, EC 4.2.1.1), i.e., the cytosolic CA I and II, and the tumor-associated, transmembrane isozyme CA IX. Interesting biological activity was detected for some of the new mercaptans, with inhibition constants in the low micromolar range. 相似文献
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