dc.contributor | Universidade Federal do Ceará | |
dc.contributor | Université de Montréal | |
dc.contributor | Universidade Federal de São Paulo (UNIFESP) | |
dc.creator | Medeiros, M.a.s. | |
dc.creator | França, M.s.f. | |
dc.creator | Boileau, G. | |
dc.creator | Juliano, Luiz [UNIFESP] | |
dc.creator | Carvalho, K.m. | |
dc.date.accessioned | 2015-06-14T13:24:39Z | |
dc.date.available | 2015-06-14T13:24:39Z | |
dc.date.created | 2015-06-14T13:24:39Z | |
dc.date.issued | 1997-10-01 | |
dc.identifier | Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 30, n. 10, p. 1157-1162, 1997. | |
dc.identifier | 0100-879X | |
dc.identifier | http://repositorio.unifesp.br/handle/11600/538 | |
dc.identifier | S0100-879X1997001000003.pdf | |
dc.identifier | S0100-879X1997001000003 | |
dc.identifier | 10.1590/S0100-879X1997001000003 | |
dc.identifier | WOS:A1997YA76600003 | |
dc.description.abstract | Two intramolecularly quenched fluorogenic peptides containing o-aminobenzoyl (Abz) and ethylenediamine 2,4-dinitrophenyl (EDDnp) groups at amino- and carboxyl-terminal amino acid residues, Abz-<!-- $MVD$:face(Times) -->DArg-Arg-Leu-EDDnp (Abz-<!-- $MVD$:face(Times) -->DRRL-EDDnp) and Abz-<!-- $MVD$:face(Times) -->DArg-Arg-Phe-EDDnp (Abz-<!-- $MVD$:face(Times) -->DRRF-EDDnp), were selectively hydrolyzed by neutral endopeptidase (NEP, enkephalinase, neprilysin, EC 3.4.24.11) at the Arg-Leu and Arg-Phe bonds, respectively. The kinetic parameters for the NEP-catalyzed hydrolysis of Abz-<!-- $MVD$:face(Times) -->DRRL-EDDnp and Abz-<!-- $MVD$:face(Times) -->DRRF-EDDnp were Km = 2.8 µM, kcat = 5.3 min-1, kcat/Km = 2 min-1 µM-1 and Km = 5.0 µM, kcat = 7.0 min-1, kcat/Km = 1.4 min-1 µM-1, respectively. The high specificity of these substrates was demonstrated by their resistance to hydrolysis by metalloproteases [thermolysin (EC 3.4.24.2), angiotensin-converting enzyme (ACE; EC 3.4.24.15)], serineproteases [trypsin (EC 3.4.21.4), <!-- $MVD$:face(Symbol) -->a-chymotrypsin (EC 3.4.21.1)] and proteases present in tissue homogenates from kidney, lung, brain and testis. The blocked amino- and carboxyl-terminal amino acids protected these substrates against the action of aminopeptidases, carboxypeptidases and ACE. Furthermore, <!-- $MVD$:face(Times) -->DR amino acids ensured total protection of Abz-<!-- $MVD$:face(Times) -->DRRL-EDDnp and Abz-<!-- $MVD$:face(Times) -->DRRF-EDDnp against the action of thermolysin and trypsin. Leu-EDDnp and Phe-EDDnp were resistant to hydrolysis by <!-- $MVD$:face(Symbol) -->a-chymotrypsin. The high specifity of these substrates suggests their use for specific NEP assays in crude enzyme preparations | |
dc.language | eng | |
dc.publisher | Associação Brasileira de Divulgação Científica | |
dc.relation | Brazilian Journal of Medical and Biological Research | |
dc.rights | Acesso aberto | |
dc.subject | neutral endopeptidase | |
dc.subject | enkephalinase | |
dc.subject | neprilysin | |
dc.subject | fluorogenic substrates | |
dc.subject | phosphoramidon | |
dc.title | Specific fluorogenic substrates for neprilysin (neutral endopeptidase, EC 3.4.24.11) which are highly resistant to serine- and metalloproteases | |
dc.type | Artigo | |