Protein phosphorylation: a motive force for adaptive evolution.

Spontaneity and diversity are the intrinsic properties of protein phosphorylation. They provide living systems with opportunities for polyvariant transformation of expressed genetic information and alteration of their energy metabolism under change of living conditions. Thus, protein phosphorylation can be regarded as a molecular mechanism for adaptation and selection of mutant proteins useful for the cell, i.e. a motive force for adaptive evolution.