한빛사논문
- 조회369
Hyun Jung Hwang 1,2, Tae Lim Park 1,2, Hyeong-In Kim 1,2, Yeonkyoung Park 1, Geunhee Kim 1, Chiyeol Song 1, Won-Ki Cho 1,* & Yoon Ki Kim 1,*
1Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea. 2These authors contributed equally: Hyun Jung Hwang, Tae Lim Park, Hyeong-In Kim.
*Corresponding authors: correspondence to Won-Ki Cho or Yoon Ki Kim
Abstract
YTHDF2 has been extensively studied and typified as an RNA-binding protein that specifically recognizes and destabilizes RNAs harboring N6-methyladenosine (m6A), the most prevalent internal modification found in eukaryotic RNAs. In this study, we unravel the m6A-independent role of YTHDF2 in the formation of an aggresome, where cytoplasmic protein aggregates are selectively sequestered upon failure of protein homeostasis mediated by the ubiquitin-proteasome system. Downregulation of YTHDF2 in HeLa cells reduces the circularity of aggresomes and the rate of movement of misfolded polypeptides, inhibits aggresome formation, and thereby promotes cellular apoptosis. Mechanistically, YTHDF2 is recruited to a misfolded polypeptide-associated complex composed of UPF1, CTIF, eEF1A1, and DCTN1 through its interaction with UPF1. Subsequently, YTHDF2 increases the interaction between the dynein motor protein and the misfolded polypeptide-associated complex, facilitating the diffusion dynamics of the movement of misfolded polypeptides toward aggresomes. Therefore, our data reveal that YTHDF2 is a cellular factor involved in protein quality control.
논문정보
- Research article
- 2023년 10월 (BRIC 등록일 2023-10-10)
- 국내 연구진
- 생명과학 > 분자생물학
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