N-Myristoylation of the catalytic subunit of cAMP-dependent protein kinase in the free-living nematode Caenorhabditis elegans.

N-Myristoylation of the catalytic subunit (C-subunit) of cAMP-dependent protein kinase is widespread in animal cells. Some invertebrates express non-myristoylated isoforms of C-subunit but these co-exist with at least one myristoylated isoform. The generality of this observation implies an indispensable function for myristoylated C-subunit, but notwithstanding this, neither of the C-subunit isoforms hitherto described in C. elegans is apparently N-myristoylated. In light of this anomaly, the myristoylation status of the C-subunit has been examined in adult C. elegans. Evidence is presented for the presence of an N-myristoylated isoform.