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Cited 3 time in webofscience Cited 4 time in scopus
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CPNE1-mediated neuronal differentiation can be inhibited by HAX1 expression in HiB5 cells

Authors
Choi, Hye YoungPark, NammiLee, BoahChoe, Yeong InWoo, Dong KyunPark, Jae-YongYoo, Jae Cheal
Issue Date
10-Dec-2020
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Keywords
Copine1; HAX1; HiB5 cell; AKT; Differentiation
Citation
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.533, no.3, pp.319 - 324
Indexed
SCIE
SCOPUS
Journal Title
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume
533
Number
3
Start Page
319
End Page
324
URI
https://scholarworks.bwise.kr/gnu/handle/sw.gnu/5794
DOI
10.1016/j.bbrc.2020.09.037
ISSN
0006-291X
Abstract
We previously demonstrated that CPNE1 induces neuronal differentiation and identified two binding proteins of CPNE1 (14-3-3 gamma and Jabl ) as potential regulators of CPNE1-mediated neuronal differentiation in hippocampal progenitor cells. To better understand the cellular processes in which CPNE1 participates in neuronal differentiation, we here carried out a yeast two-hybrid screening to find another CPNE1 binding protein. Among the identified proteins, HCLS1-related protein X-1 (HAX1) directly interacts with CPNE1. Immunostaining experiments showed that a fraction of CPNE1 and HAX1 co-localized in the cytosol, particularly in the plasma membrane. In addition, the physical interaction as well as the specific binding regions between CPNE1 and HAX1 were confirmed in vitro and in vivo. Moreover, AKT phosphorylation, Tuj1 (neuronal marker protein) expression, and neurite outgrowth are all reduced in CPNE1/HAX1 overexpressing cells compared to CPNE1 only overexpressing HiB5 cells. Conversely, the HAX1 mutant that does not bind to CPNE1 was unable to inhibit the CPNE1-mediated neuronal differentiation. Together these results indicate that HAX1 is a binding partner of CPNE1 and CPNE1-mediated neuronal differentiation is negatively affected through the binding of HAX1, especially its N-terminal region, with CPNE1. (C) 2020 Elsevier Inc. All rights reserved.
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의과대학 (의학과)
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