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Wdpcp, a Protein that Regulates Planar Cell Polarity, Interacts with Multi‐PDZ Domain Protein 1 (MUPP1) through a PDZ Interaction
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  • Journal title : Journal of Life Science
  • Volume 26, Issue 3,  2016, pp.282-288
  • Publisher : Korean Society of Life Science
  • DOI : 10.5352/JLS.2016.26.3.282
 Title & Authors
Wdpcp, a Protein that Regulates Planar Cell Polarity, Interacts with Multi‐PDZ Domain Protein 1 (MUPP1) through a PDZ Interaction
Jang, Won Hee; Jeong, Young Joo; Choi, Sun Hee; Yea, Sung Su; Lee, Won Hee; Kim, Mooseong; Kim, Sang-Jin; Urm, Sang-Hwa; Moon, Il Soo; Seog, Dae-Hyun;
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Protein-protein interactions regulate the subcellular localization and function of receptors, enzymes, and cytoskeletal proteins. Proteins containing the postsynaptic density-95/disks large/zonula occludens-1 (PDZ) domain have potential to act as scaffolding proteins and play a pivotal role in various processes, such as synaptic plasticity, neural guidance, and development, as well as in the pathophysiology of many diseases. Multi-PDZ domain protein 1 (MUPP1), which has 13 PDZ domains, has a scaffolding function in the clustering of surface receptors, organization of signaling complexes, and coordination of cytoskeletal dynamics. However, the cellular function of MUPP1 has not been fully elucidated. In the present study, a yeast two-hybrid system was used to identify proteins that interacted with the N-terminal PDZ domain of MUPP1. The results revealed an interaction between MUPP1 and Wdpcp (formerly known as Fritz). Wdpcp was identified as a planar cell polarity (PCP) effector, which is known to have a role in collective cell migration and cilia formation. Wdpcp bound to the PDZ1 domain but not to other PDZ domains of MUPP1. The C-terminal end of Wdpcp was essential for the interaction with MUPP1 in the yeast two-hybrid assay. This interaction was further confirmed in a glutathione S-transferase (GST) pull-down assay. When coexpressed in HEK-293T cells, Wdpcp was coimmunoprecipitated with MUPP1. In addition, MUPP1 colocalized with Wdpcp at the same subcellular region in cells. Collectively, these results suggest that the MUPP1-Wdpcp interaction could modulate actin cytoskeleton dynamics and polarized cell migration.
MUPP1;PDZ domain;Planar cell polarity (PCP);scaffolding protein;Wdpcp;
 Cited by
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