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. 1978 Jun 28;20(2):119-24.
doi: 10.1007/BF00241390.

Cyclic AMP increase the Na+ permeability of the avian erythrocyte membrane by a process which does not involve protein phosphorylation

M Weller, W Laing

Cyclic AMP increase the Na+ permeability of the avian erythrocyte membrane by a process which does not involve protein phosphorylation

M Weller et al. Mol Cell Biochem. .

Abstract

Preparations of avian erythrocyte plasma membranes have been made which are in the form of sealed vesicles. Using these preparations the permeability of the membranes to N+, K+, Mg2+ and Ca2+ was measured. Monobutyryl cyclic AMP and cyclic AMP increased the permeability to Na+ and Ca+ under conditions where no protein phosphorylation could occur. The only effect of phosphorylation of membrane proteins was to reduce Ca+ permeability. It is thus concluded that cyclic AMP increases Na+ permeability in the avian erythroycte by a direct effect which does not involve protein phosphorylation.

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