Regulation of cytosolic protein-tyrosine kinase from porcine spleen by polyamines and negative-charged polysaccharides.

Abstract:

:In vitro regulation of cytosolic protein-tyrosine kinase from porcine spleen (CPTK-40) by various positive or negative charged compounds was studied. Spermine and spermidine stimulated the activity of CPTK-40 about two-fold using (Val5)angiotensin II as a substrate. This stimulation was not specific for the peptide but was also observed in the case of tubulin phosphorylation indicating a direct effect of these compounds on the enzyme itself. On the contrary, negative-charged polysaccharides were shown to be strong inhibitors of CPTK-40. The possibility of the physiological regulation of CPTK-40 by these compounds is briefly discussed.

authors

Sakai K,Sada K,Tanaka Y,Kobayashi T,Nakamura S,Yamamura H

doi

10.1016/0006-291x(88)90222-7

subject

Has Abstract

pub_date

1988-08-15 00:00:00

pages

883-9

issue

3

eissn

0006-291X

issn

1090-2104

pii

0006-291X(88)90222-7

journal_volume

154

pub_type

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