Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1994937 | Microvascular Research | 2013 | 6 Pages |
•Using two-hybrid system, several binding partners of CPI-17 were identified.•Plakoglobin was identified as a real binding partner of CPI-17 in human cells.•The phosphorylation of CPI-17 interrupted its interaction with plakoglobin.
We have previously demonstrated that PKC-potentiated inhibitory protein of protein phosphatase-1 (CPI-17) is expressed in lung endothelium. CPI-17, a specific inhibitor of myosin light chain phosphatase (MLCP), is involved in the endothelial cytoskeletal and barrier regulation. In this paper, we report the identification of fourteen putative CPI-17 interacting proteins in the lung using BacterioMatch Two-Hybrid System. Five of them: plectin 1 isoform 1, alpha II spectrin, OK/SW-CL.16, gelsolin isoform a, and junction plakoglobin are involved in actin cytoskeleton organization and cell adhesion, suggesting possible significance of these binding partners in CPI-17-mediated cytoskeletal reorganization of endothelial cells. Furthermore, we confirmed the specific interaction between plakoglobin and CPI-17, which is affected by the phosphorylation status of CPI-17 in human lung microvascular endothelial cells.
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