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
Article
in En
| LILACS
| ID: lil-60216
Responsible library:
BR1.1
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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Index:
LILACS
Main subject:
Schistosoma mansoni
/
Ca(2/) Mg(2/)-ATPase
/
Calcium-Transporting ATPases
Limits:
Animals
Language:
En
Journal:
Braz. j. med. biol. res
Journal subject:
BIOLOGIA
/
MEDICINA
Year:
1988
Type:
Article
/
Congress and conference
/
Project document