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.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sakai K,Sada K,Tanaka Y,Kobayashi T,Nakamura S,Yamamura Hdoi
10.1016/0006-291x(88)90222-7subject
Has Abstractpub_date
1988-08-15 00:00:00pages
883-9issue
3eissn
0006-291Xissn
1090-2104pii
0006-291X(88)90222-7journal_volume
154pub_type
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