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The apoptosis-inducing protein kinase DRAK2 is inhibited in a calcium-dependent manner by the calcium-binding protein CHP.

Authors: Kuwahara, H  Kamei, J  Nakamura, N  Matsumoto, M  Inoue, H  Kanazawa, H 
Citation: Kuwahara H, etal., J Biochem. 2003 Aug;134(2):245-50.
Pubmed: (View Article at PubMed) PMID:12966074

Calcineurin homologous protein (CHP) is an EF-hand Ca(2+)-binding protein capable of interacting with various cellular proteins including Na(+)/H(+) exchangers, kinesin-related proteins, and apoptosis-inducing protein kinase DRAK2. We investigated the role of CHP on the DRAK2 protein kinase in vitro. CHP significantly reduced (approximately 85% inhibition) the kinase activity of DRAK2 for both autophosphorylation and phosphorylation of exogenous substrate (myosin light chain). The inhibitory effect of CHP was dependent on the presence of Ca(2+), whereas the interaction between CHP and DRAK2 was not Ca(2+)-dependent. These observations suggest that CHP negatively regulates the apoptosis-inducing protein kinase DRAK2 in a manner that depends on intracellular Ca(2+)-concentration.

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CRRD Object Information
CRRD ID: 8553340
Created: 2014-05-08
Species: All species
Last Modified: 2014-05-08
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.