CBL-CIPK module-mediated phosphoregulation: facts and hypothesis

The Biochemical Journal
Sibaji K SanyalGirdhar K Pandey

Abstract

Calcium (Ca2+) signaling is a versatile signaling network in plant and employs very efficient signal decoders to transduce the encoded message. The CBL-CIPK module is one of the sensor-relay decoders that have probably evolved with the acclimatization of land plant. The CBLs are unique proteins with non-canonical Ca2+ sensing EF-hands, N-terminal localization motif and a C-terminal phosphorylation motif. The partner CIPKs are Ser/Thr kinases with kinase and regulatory domains. Phosphorylation plays a major role in the functioning of the module. As the module has a functional kinase to transduce signal, it employs phosphorylation as a preferred mode for modulation of targets as well as its interaction with CBL. We analyze the data on the substrate regulation by the module from the perspective of substrate phosphorylation. We have also predicted some of the probable sites in the identified substrates that may be the target of the CIPK mediated phosphorylation. In addition, phosphatases have been implicated in reversing the CIPK mediated phosphorylation of substrates. Therefore, we have also presented the role of phosphatases in the modulation of the CBL-CIPK and its targets. We present here an overview of the phosphoregulation me...Continue Reading

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Citations

Aug 14, 2020·International Journal of Molecular Sciences·Xiao MaZhen-Hui Gong
Jun 1, 2021·Biochemical and Biophysical Research Communications·Qiu Jun LinYuan Hu Xuan
Aug 21, 2021·Plant Cell Reports·Pooja VermaGirdhar K Pandey
Aug 24, 2021·Frontiers in Physiology·Barkha RaviGirdhar K Pandey

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