Bidirectional signals transduced by DAPK-ERK interaction promote the apoptotic effect of DAPK.

Article Details

Citation

Chen CH, Wang WJ, Kuo JC, Tsai HC, Lin JR, Chang ZF, Chen RH

Bidirectional signals transduced by DAPK-ERK interaction promote the apoptotic effect of DAPK.

EMBO J. 2005 Jan 26;24(2):294-304. Epub 2004 Dec 16.

PubMed ID
15616583 [ View in PubMed
]
Abstract

Death-associated protein kinase (DAPK) is a death domain-containing serine/threonine kinase, and participates in various apoptotic paradigms. Here, we identify the extracellular signal-regulated kinase (ERK) as a DAPK-interacting protein. DAPK interacts with ERK through a docking sequence within its death domain and is a substrate of ERK. Phosphorylation of DAPK at Ser 735 by ERK increases the catalytic activity of DAPK both in vitro and in vivo. Conversely, DAPK promotes the cytoplasmic retention of ERK, thereby inhibiting ERK signaling in the nucleus. This reciprocal regulation between DAPK and ERK constitutes a positive feedback loop that ultimately promotes the apoptotic activity of DAPK. In a physiological apoptosis system where ERK-DAPK interplay is reinforced, downregulation of either ERK or DAPK suppresses such apoptosis. These results indicate that bidirectional signalings between DAPK and ERK may contribute to the apoptosis-promoting function of the death domain of DAPK.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Mitogen-activated protein kinase 1P28482Details
Mitogen-activated protein kinase 3P27361Details
Death-associated protein kinase 1P53355Details