Abstract:
:Incubation of purified protein kinase C with H2O2 results in the generation of a persistently activated form of the enzyme which is no longer dependent on Ca2+ or lipid cofactors. This oxidative activation of purified protein kinase C requires added Fe2+ in the incubation medium. Treatment of the soluble fraction of hippocampal homogenates with H2O2 also leads to persistent activation of protein kinase C; however, oxidative activation of protein kinase C under these conditions does not require the addition of Fe2+. The persistently activated form of protein kinase C appears as a novel peak of activity on DE52 anion exchange columns, suggesting a modification of the charge character of the enzyme. Thus, oxidative modification of protein kinase C can result in its persistent activation, and this mechanism may constitute a pathway for physiological activation of the enzyme in the hippocampus.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Palumbo EJ,Sweatt JD,Chen SJ,Klann Edoi
10.1016/0006-291x(92)90463-usubject
Has Abstractpub_date
1992-09-30 00:00:00pages
1439-45issue
3eissn
0006-291Xissn
1090-2104pii
0006-291X(92)90463-Ujournal_volume
187pub_type
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