Song WJ, Song EAC, Choi SH, Baik HH, Jin BK, Kim JH, Chung SH. Dyrk1A-mediated phosphorylation of RCAN1 promotes the formation of insoluble RCAN1 aggregates.
Neurosci Lett 2013;
554:135-40. [PMID:
24021800 DOI:
10.1016/j.neulet.2013.08.066]
[Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 08/13/2013] [Accepted: 08/29/2013] [Indexed: 12/21/2022]
Abstract
The mechanisms underlying aggregate formation in age-related neurodegenerative diseases remain not well understood. Here we investigated whether dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase 1A (Dyrk1A) is involved in the formation of regulator of calcineurin 1 (RCAN1) aggregates. We show that RCAN1 self-associates and forms multimers, and that this process is promoted by the Dyrk1A-mediated phosphorylation of RCAN1 at the Thr(192) residue. Transgenic mice that overexpress the Dyrk1A exhibited lower levels of phospho-Thr(192)-RCAN1 in 10-month-old-group compared to littermate controls, when analyzed with soluble hippocampus lysates. These results suggest that the phosphorylation of RCAN1 by Dyrk1A stimulates the formation of insoluble aggregates upon aging.
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