Zea mays CCaMK: autophosphorylation-dependent substrate phosphorylation and down-regulation by red light

Pandey, Sona ; Sopory, Sudhir K. (2001) Zea mays CCaMK: autophosphorylation-dependent substrate phosphorylation and down-regulation by red light Journal of Experimental Botany, 52 (357). pp. 691-700. ISSN 0022-0957

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Official URL: http://jxb.oxfordjournals.org/content/52/357/691.s...

Related URL: http://dx.doi.org/10.1093/jexbot/52.357.691

Abstract

The role of protein kinases has been extensively studied in various signal transduction pathways and they are one of the most important components that link the signal perception to the final response. However, not many studies have been reported, especially from the plant systems, that show the regulation pattern of the kinase itself under different conditions. A calcium/calmodulin-dependent protein kinase has already been purified and characterized from etiolated maize coleoptiles. In this paper a detailed study of how the kinase itself is regulated at the autophosphorylation level is provided. Evidence is also given that the autophosphorylation of kinase effects its activity towards substrate phosphorylation. It is further shown that the kinase is an important component of the light signalling pathway as the level of the kinase itself decreases by red light irradiation.

Item Type:Article
Source:Copyright of this article belongs to Oxford University Press.
Keywords:Autophosphorylation; Ca2+/CaM-dependent Protein Kinase; Red Light; Zea mays
ID Code:49940
Deposited On:21 Jul 2011 09:41
Last Modified:21 Jul 2011 09:41

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