The protein kinase C-related kinase PRK2 interacts with the protein tyrosine phosphatase PTP-BL via a novel PDZ domain binding motif.
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Gross C, Heumann R, Erdmann KS
The protein kinase C-related kinase PRK2 interacts with the protein tyrosine phosphatase PTP-BL via a novel PDZ domain binding motif.
FEBS Lett. 2001 May 11;496(2-3):101-4.
- PubMed ID
- 11356191 [ View in PubMed]
- Abstract
Protein tyrosine phosphatase-basophil like (PTP-BL) is a large non-transmembrane protein tyrosine phosphatase implicated in the modulation of the cytoskeleton. Here we describe a novel interaction of PTP-BL with the protein kinase C-related kinase 2 (PRK2), a serine/threonine kinase regulated by the G-protein rho. This interaction is mediated by the PSD-95, Drosophila discs large, zonula occludens (PDZ)3 domain of PTP-BL and the extreme C-terminus of PRK2 as shown by yeast two-hybrid assays and coimmunoprecipitation experiments from transfected HeLa cells. In particular, we demonstrate that a conserved C-terminal cysteine of PRK2 is indispensable for the interaction with PTP-BL. In HeLa cells we demonstrate colocalization of both proteins in lamellipodia like structures. Interaction of PTP-BL with the rho effector kinase PRK2 gives further evidence for a possible function of PTP-BL in the regulation of the actin cytoskeleton.