Artículos de revistas
A quick procedure for the isolation of dimeric piratoxins-I and II, two myotoxins from Bothrops pirajai snake venom. N-terminal sequencing
Registro en:
Biochemistry And Molecular Biology International. Academic Press Aust, v. 37, n. 6, n. 1047, n. 1055, 1995.
1039-9712
WOS:A1995VG87700003
Autor
Toyama, MH
Mancuso, LC
Giglio, JR
Novello, JC
Oliveira, B
Marangoni, S
Institución
Resumen
Two myotoxins, MP-I and MP-II, from Bothrops pirajai snake venom, have been purified by a quick high performance liquid chromatography (HPLC) procedure. Based on the HPLC coelution profile, amino acid composition, N-terminal sequence, polyacrylamide gel electrophoresis (PAGE) migration, as well as lack of phospholipase-A(2) (PLA(2)) and proteolytic activities, MP-I and MP-II were identified as piratoxin-I (PrTX-I) and II (PrTX-II), respectively. This procedure affords, aside the reduced operation time, a high yield (35% of the applied sample in terms of A(280nm)) Of MP-I, which is the major myotoxin of the venom. The N-terminal sequences of MP-I, MP-II, PrTX-I and PrTX-II, up to the 51st, 31st, 46th and 39th residues, respectively, have been determined, revealing MP-I (and hence PrTX-I) as a Lys-49 PLA(2)-like myotoxin. Both MP-I and MP-II have been shown, by SDS-PAGE, to occur in dimeric isoforms. 37 6 1047 1055