A Mg2+-independent Ca2+-stimulated ATPase activity in the tegument of Schistosoma mansoni
Braz. j. med. biol. res
;
21(3): 449-51, Mar. 1988. ilus
Artigo
em Inglês
| LILACS
| ID: lil-60216
RESUMO
A tegumental fraction was prepared from Schistosoma mansoni. This fraction exhibited ATPase activity stimulated by Ca2+ in the absence of Mg2+. The Mg2+ independency was assessed by lowering contaminant Mg2+ using CDTA. The peak of activity was 220 micronmol Pi mg-1 protein h-1 and the K0.5 for CaATP was 0.32 mM; the same K0.5 was obtained using MgATP as substrate, in the absence of Ca2+. Both activities may be promoted by the same enzyme since the addition of Ca2+ did not increase the ATPase activity measured in the presence of a saturating MgATP concentration
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Índice:
LILACS (Américas)
Assunto principal:
Schistosoma mansoni
/
ATPase de Ca(2/) e Mg(2/)
/
ATPases Transportadoras de Cálcio
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. med. biol. res
Assunto da revista:
Biologia
/
Medicina
Ano de publicação:
1988
Tipo de documento:
Artigo
/
Congresso e conferência
/
Documento de projeto
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