Keywords Parole chiave: Fret, Hts, Proteases, Small Molecules, Trypsin Inhibitors, Diagnosis, Energy Transfer, Enzyme Activity, Fluorescence, Naphthalene, Peptides, Enzyme Inhibition, Alpha 1 Antitrypsin, Proteinase Inhibitor, Serine Proteinase, Article, Assay, Chemical Structure, Controlled Study, Excitation, Fluorescence Resonance Energy Transfer, Fluorometry, Ic 50, Molecular Docking, Spectral Sensitivity, Fluorescent Dyes, Naphthalenesulfonates, P-Dimethylaminoazobenzene, Protease Inhibitors,
Affiliations Affiliazioni: *** IBB - CNR ***
Istituto di Biostrutture e Bioimmagini, IBB-CNR, Via Mezzocannone 16, 80134 Naples, Italy Department of Physics, Sapienza Università di Roma, P.le Aldo Moro, 5, 00185 Rome, Italy
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Identification of Protease Inhibitors by a Fast Fluorimetric Assay
Anomalous protease activities are associated with many diseases. Great efforts are paid for selecting specific protease modulators for therapeutic approaches. We have selected new modulators of enzyme activity by an homogeneous assay based on a doubly labeled small peptide used as substrate of trypsin. The substrate incorporates the fluorophore 5-[(2-aminoethyl)amino]naphthalene-1-sulfonic acid (EDANS) at one end and an EDANS-quenching moiety (Dabcyl, (4-(4-dimethylaminophenylazo)-benzoic acid)) on the other end. Following cleavage by trypsin, the peptide-EDANS product is released interrupting the fluorescence resonance energy transfer effect and yielding bright fluorescence, which can be detected using excitation wavelengths at 335-345 nm and emission wavelengths at 485-510 nm. The method optimized, tested by detecting the strong inhibiting effect of alpha 1-antitrypsin on trypsin activity, has been developed on 384 multi-well plates in a volume of 10 mu L, using an automated platform. From the screening of a chemical library, four compounds that inhibit trypsin activity with IC(50)s in the micromolar range have been identified. Interestingly, the most active compound (M4) shows a chemical structure recapitulating that of other more potent inhibitors with thiourea and halogenated centers. Molecular docking studies show that M4 is a competitive inhibitor recognizing most residues within or nearby the catalytic pocket.
Identification of Protease Inhibitors by a Fast Fluorimetric Assay
Kim YH, Shin SW, Pellicano R, Fagoonee S, Choi IJ, Kim YI, Park B, Choi JM, Kim SG, Choi J, Park JY, Oh S, Yang HJ, Lim JH, Im JP, Kim JS, Jung HC, Ponzetto A, Figura N, Malfertheiner P, Choi IJ, Kook MC, Kim YI, Cho SJ, Lee JY, Kim CG, Park B, Nam BH, Bae SE, Choi KD, Choe J, Kim SO, Na HK, Choi JY, Ahn JY, Jung KW, Lee J, Kim DH, Chang HS, Song HJ, Lee GH, Jung HY, Seta T, Takahashi Y, Noguchi Y, Shikata S, Sakai T, Sakai K, Yamashita Y, Nakayama T, Leja M, Park JY, Murillo R, Liepniece-karele I, Isajevs S, Kikuste I, Rudzite D, Krike P, Parshutin S, Polaka I, Kirsners A, Santare D, Folkmanis V, Daugule I, Plummer M, Herrero R, Tsukamoto T, Nakagawa M, Kiriyama Y, Toyoda T, Cao X, Corral JE, Mera R, Dye CW, Morgan DR, Lee YC, Lin JT, Garcia Martin R, Matia Cubillo A, Lee SH, Park JM, Han YM, Ko WJ, Hahm KB, Leontiadis GI, Ford AC, Ichinose M, Sugano K, Jeong M, Park JM, Han YM, Park KY, Lee DH, Yoo JH, Cho JY, Hahm KB, Bang CS, Baik GH, Shin IS, Kim JB, Suk KT, Yoon JH, Kim YS, Kim DJ * Helicobacter pylori Eradication for Prevention of Metachronous Recurrence after Endoscopic Resection of Early Gastric Cancer(207 visite) N Engl J Med (ISSN: 0028-4793, 0028-4793linking, 1533-4406electronic), 2015 Jun; 30642104201566393291: 749-756. Impact Factor:59.558 DettagliEsporta in BibTeXEsporta in EndNote
Santulli G, Cipolletta E, Sorriento D, Del Giudice C, Anastasio A, Monaco S, Maione AS, Condorelli G, Puca A, Trimarco B, Illario M, Iaccarino G * CaMK4 gene deletion induces hypertension(277 visite) J Am Heart Assoc Journal Of The American Heart Association (ISSN: 2047-9980), 2012; 1(4): N/D-N/D. Impact Factor:2.882 DettagliEsporta in BibTeXEsporta in EndNote
Antonini A, Vitale C, Barone P, Cilia R, Righini A, Bonuccelli U, Abbruzzese G, Ramat S, Petrone A, Quatrale R, Marconi R, Ceravolo R, Stefani A, Lopiano L, Zappia M, Capus L, Morgante L, Tamma F, Tinazzi M, Colosimo C, Guerra UP, Valzania F, Fagioli G, Distefano A, Bagnato A, Feggi L, Anna S, Maria Teresa Rosaria De Cr, Nobili F, Mazzuca N, Baldari S, Eleopra R, Bestetti A, Benti R, Varrone A, Volterrani D, Massa R, Stocchi F, Schillaci O, Dore F, Zibetti M, Castellano G, Battista SG, Giorgetti G * The relationship between cerebral vascular disease and parkinsonism: The VADO study(402 visite) Parkinsonism Relat D (ISSN: 1353-8020, 1873-5126, 1873-5126electronic), 2012; 18(6): 775-780. Impact Factor:3.274 DettagliEsporta in BibTeXEsporta in EndNote
Testino G, Leone S, Fagoonee S, Del Bas JM, Rodriguez B, Puiggros F, Marine S, Rodriguez MA, Morina D, Armengol L, Caimari A, Arola L, Cimini FA, Barchetta I, Carotti S, Bertoccini L, Baroni MG, Vespasiani-gentilucci U, Cavallo MG, Morini S, Nelson JE, Roth CL, Wilson LA, Yates KP, Aouizerat B, Morgan-stevenson V, Whalen E, Hoofnagle A, Mason M, Gersuk V, Yeh MM, Kowdley KV, Lee SM, Jun DW, Cho YK, Jang KS, Kucukazman M, Ata N, Dal K, Yeniova AO, Kefeli A, Basyigit S, Aktas B, Akin KO, Agladioglu K, Ure OS, Topal F, Nazligul Y, Beyan E, Ertugrul DT, Catena C, Cosma C, Camozzi V, Plebani M, Ermani M, Sechi LA, Fallo F, Goto Y, Ray MB, Mendenhall CL, French SW, Gartside PS Serum vitamin A deficiency and increased intrahepatic expression of cytokeratin antigen in alcoholic liver disease(423 visite) Hepatology (ISSN: 1827-1669electronic, 0026-4806linking), 1988 Sep; 83120693611123109(5): 1019-1026. Impact Factor:0.913 DettagliEsporta in BibTeXEsporta in EndNote
523 Records (494 escludendo Abstract e Conferenze). Impact factor totale: 1835.876 (1759.729 escludendo Abstract e Conferenze). Impact factor a 5 anni totale: 1906.006 (1814.359 escludendo Abstract e Conferenze).
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