A Ca2+‐dependent protein kinase phosphorylates phosphoenolpyruvate carboxylase in maize
- 4 May 1992
- journal article
- Published by Wiley in FEBS Letters
- Vol. 302 (1), 86-88
- https://doi.org/10.1016/0014-5793(92)80291-n
Abstract
In C4 plants the activity of phosphoenolpyruvate carboxylase (PEPC; EC 4.1.1.31) is regulated by phosphorylation/dephosphorylation which is mediated by light/dark signals. The study using protein kinase inhibitors showed that the inhibition pattern of maize PEPC-protein kinase (PEPC-PK) is similar to that of myosin light chain kinase, a Ca2+-calmodulin-dependent PK. The kinase activity was also inhibited by EGTA and the inhibition was relieved by Ca2+. These results suggest that PEPC-PK is Ca2+-dependent in contrast with previous observations by other research groupsKeywords
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