J Biochem 1990 Jul 01;1081:1-3. doi: 10.1093/oxfordjournals.jbchem.a123146.

The cAMP-dependent protein kinase in sea urchin sperm tails: association of the enzyme with the flagellar axonemes.

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When sea urchin spermatozoa were treated with a Triton X-100 solution, cAMP-dependent protein kinase (cA-kinase) activity was extracted. Further extraction with Triton X-100 of axonemes isolated from the Triton-extracted sperm again released a considerable amount of the cA-kinase activity. The activity which remained after extraction three times with Triton X-100 was released by treatment with a low salt solution. These activities found in the various extracts were likely to be due to the same cA-kinase, which was a mammalian type II-like enzyme. The cA-kinase activity that remained in the axonemes after the first Triton X-100 extraction may be involved in the regulation of flagellar movement in the Triton-extracted sperm.

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Genes referenced: LOC100887844 LOC586799