Abstract：
:Autosomal dominant polycystic kidney disease (ADPKD), a hereditary renal disease caused by mutations in PKD1 (85%) or PKD2 (15%), is characterized by the development of gradually enlarging multiple renal cysts and progressive renal failure. Polycystin-1 (PC1), PKD1 gene product, is an integral membrane glycoprotein which regulates a number of different biological processes including cell proliferation, apoptosis, cell polarity, and tubulogenesis. PC1 is a target of various proteolytic cleavages and proteosomal degradations, but its role in intracellular signaling pathways remains poorly understood. Herein, we demonstrated that PC1 is a novel substrate for μ- and m-calpains, which are calcium-dependent cysteine proteases. Overexpression of PC1 altered both Janus-activated kinase 2 (JAK2) and extracellular signal-regulated kinase (ERK) signals, which were independently regulated by calpain-mediated PC1 degradation. They suggest that the PC1 function on JAK2 and ERK signaling pathways might be regulated by calpains in response to the changes in intracellular calcium concentration.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Kim H,Kang AY,Ko AR,Park HC,So I,Park JH,Cheong HI,Hwang YH,Ahn Csubject
Has Abstractpub_date
2014-01-01 00:00:00pages
62-8issue
1eissn
0014-4827issn
1090-2422journal_volume
320pub_type
杂志文章abstract：:Endocytosis of signaling receptors, such as epidermal growth factor receptor (EGFR), tightly controls the signal transduction process triggered by ligand activation of these receptors. To identify new regulators of the endocytic trafficking of EGFR an RNA interference screen was performed for genes involved in ubiquit...
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