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Updated: Aug 27, 2026

Phosphopeptide Analysis of Rodent Epididymal Spermatozoa
Published on: December 30, 2014
Regulation of spermidine acetyltransferase activity by phosphorylation and dephosphorylation
Abstract:
Spermidine acetyltransferase activity is more than 10-fold higher in the pancreas of a 20-hr-fasted than in that of a fed chicken. The preparation of the fed bird inactivates the other. The effect is due to a thermolabile component of microsomes, and is also obtained with alkaline phosphatase. The inactivated preparation partially recovers its activity through phosphorylation catalyzed by a cAMP-dependent protein kinase. The results presented strongly suggest that spermidine acetyltransferase activity is regulated by phosphorylation and dephosphorylation.
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