Recoverin binds exclusively to an amphipathic peptide at the N terminus of rhodopsin kinase, inhibiting rhodopsin phosphorylation without affecting catalytic activity of the kinase.

Abstract excerpt

Recoverin is a calcium-dependent inhibitor of rhodopsin kinase. It prevents premature phosphorylation of rhodopsin until the opening of cGMP-gated ion channels causes a decrease in intracellular calcium levels, signaling completion of the light response. This calcium depletion causes release of recoverin from rhodopsin kinase, freeing the kinase to phosphorylate rhodopsin and to terminate the light response....

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