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Título

Protein kinase C V3 domain mutants with differential sensitivities to m-calpain are not resistant to phorbol-ester-induced down-regulation

AutorJunco, María; Webster, Catherine; Crawford, Catherine; Boscá, Lisardo ; Parker, Peter J.
Fecha de publicación1-jul-1994
EditorBlackwell Publishing
CitaciónThe Febs Journal 223(1): 259-263 (1994)
ResumenDistinct linker sequences were introduced into the protease-sensitive V3 domain of protein kinase C-α and the mutant proteins were expressed in COS-1 cells. Partially purified preparations of these mutants were functionally similar to wild-type protein kinase C-α, however their susceptibility to m-calpain was quite distinct, with one mutant being insensitive to cleavage. The three mutants, after expression in COS-1 cells, were found to behave in a manner indistinguishable from wild-type protein kinase C-α with respect to subcellular distribution, acute responses to 12-O-tetradecanoyl-phorbol 13-acetate and 12-O-tetradecanoyl-phorbol-13-acetate-induced down-regulation. The data imply that down-regulation of protein kinase C-α is likely to involve a general degradative process rather than cleavage by a site-specific protease.
Descripción5 páginas, 5 figures.
Versión del editorhttp://dx.doi.org/10.1111/j.1432-1033.1994.tb18990.x
URIhttp://hdl.handle.net/10261/23953
DOI10.1111/j.1432-1033.1994.tb18990.x
ISSN0014-2956
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