Increased phosphorylation of a membrane protein consequent to amygdaloid kindling

Patel, J.; Marangos, P.J.; Contel, N.; Gardner, G.; Post, R.M.

Journal of Neurochemistry 43(1): 169-173

1984


ISSN/ISBN: 0022-3042
PMID: 6726244
DOI: 10.1111/j.1471-4159.1984.tb06693.x
Accession: 005664488

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Abstract
The phosphorylation of both particulate and soluble proteins in the amygdala was examined in electrically kindled rats. In animals receiving electrical stimulation in the left amygdala for 5-6 days that displayed electrical after-discharges but no motor seizures, no changes were observed in the phosphorylation of either particulate or soluble proteins. In animals stimulated for 20-21 days where major motor seizures were produced, the phosphorylation of a protein having a MW of 45,000 (45 K ) was markedly increased. The phosphorylation of this protein was increased in both the right (unstimulated) and left (stimulated) amygdala. Major motor seizures induced electroconvulsive shocks did not alter phosphorylation of this protein. Phosphorylation of the 45K protein was stimulated by Ca and calmodulin. The 45K protein is a major phosphoprotein of amygdala, representing 3.2% of the total particulate phosphoproteins in control animals and 7.4% in the kindled animals. In the presence of Ca-calmodulin, 16.2% of net protein phosphorylation was accounted by the 45K protein.

Increased phosphorylation of a membrane protein consequent to amygdaloid kindling