Abstract:
:We investigated the action of vanadate on protein phosphorylation in microvessels isolated from rat brain. We found that a stimulation of protein phosphorylation from 32P-ATP occurs, in the presence of different concentrations of vanadate, 10(-3) M being the most effective dose. This action was time-dependent, and it was more evident after 60 s of treatment. The contribution of ATPase inhibition caused by vanadate appears to be negligible. In addition a stimulation of cAMP-dependent protein kinase activity was observed. The pattern of protein phosphorylation showed that exposure to 10(-3) M vanadate resulted in a nonspecific stimulation of protein phosphorylation concomitantly with a selective inhibition of the 55 KDa protein phosphorylation. The nature of this protein is also discussed.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Catalán RE,Martínez AM,Aragonés MD,Díaz Gdoi
10.1016/0006-291x(89)92289-4subject
Has Abstractpub_date
1989-09-15 00:00:00pages
771-9issue
2eissn
0006-291Xissn
1090-2104pii
0006-291X(89)92289-4journal_volume
163pub_type
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