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J. Biochem, 1990, Vol. 108, No. 1 1-3
© 1990 Japanese Biochemical Society

other

The cAMP-Dependent Protein Kinase in Sea Urchin Sperm Tails: Association of the Enzyme with the Flagellar Axonemes

Etsuo Yokota and Issei Mabuchi

Department of Biology, College of Arts and Sciences, The University of Tokyo Meguro-ku, Tokyo 153

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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