Inactivation of a MAPK-like protein kinase and activation of a MBP kinase in germinating barley embryos.
FEBS Letters(2000)
Abstract
We provide evidence for involvement of two different 45 kDa protein kinases in rehydration and germination of barley embryos. In dry embryos, a myelin basic protein (MBP) phosphorylating kinase was detected, which could be immunoprecipitated with an anti-MAPK (mitogen-activated protein kinase) antibody. Rehydration of the embryo induced a decrease in activity of this 45 kDa MAPK-like protein kinase. In addition, activity of a MBP kinase of the same molecular weight was subsequently found to be induced. This second MBP kinase activity could not be immunoprecipitated with the anti-MAPK antibody and was induced only in germinating embryos, not in dormant embryos.
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Key words
Mitogen-activated protein kinase,Myelin basic protein kinase,Germination,Rehydration,Hordeum distichum
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