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Updated: May 16, 2026

Utilizing the Ethylene-releasing Compound, 2-Chloroethylphosphonic Acid, as a Tool to Study Ethylene Response in Bacteria
Published on: November 10, 2016
C-terminal phosphorylation is essential for regulation of ethylene synthesizing ACC synthase enzyme
Swarup Roy Choudhury1, Sujit Roy2, Dibyendu N Sengupta1
1Division of Plant Biology; Bose Institute; Kolkata, India.
Abstract:
The genetic and molecular biological studies mainly in Arabidopsis and in some other plants have begun to uncover the various components of ripening signaling pathway in plants. Although transcriptional regulation of major ripening genes have been studied in detail, information on role of phosphorylation in regulating the activity and stability of core ripening pathway associated proteins in relation to ethylene biosynthesis during fruit ripening is still limited. Recently we have demonstrated the evidence for post-translational regulation of MA-ACS1 (Musa acuminata ACC synthase 1), the rate limiting step enzyme regulating ripening ethylene production in banana, through phosphorylation at the C-terminal Ser 476 and 479 residues by a 41-kDa Ser/Thr protein kinase. (1) Here we have further discussed role of protein phosphorylation in regulation of stability and activity of ACS enzymes and the mechanistic and evolutionary perspective of phosphorylation pattern of Type I ACC synthase enzymes.
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