Drosophila Clu ribonucleoprotein particle dynamics rely on the availability of functional Clu and translating ribosomes.

 0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Rachel T Cox, Hye Jin Hwang, Kelsey M Sheard

Ngôn ngữ: eng

Ký hiệu phân loại: 133.5266 Astrology

Thông tin xuất bản: England : Journal of cell science , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 744163

Drosophila Clu is a conserved multi-domain ribonucleoprotein essential for mitochondrial function that forms dynamic particles within the cytoplasm. Unlike stress granules and processing bodies (P-bodies), Clu particles disassemble under nutritional or oxidative stress. However, it is unclear how disrupting protein synthesis affects Clu particle dynamics, especially given that Clu binds mRNA and ribosomes. Here, we capitalize on ex vivo and in vivo imaging of Drosophila female germ cells to determine what domains of Clu are necessary for Clu particle assembly and how manipulating translation affects particle dynamics. Using domain deletion analysis, we identified three domains of Clu essential for particle assembly. We also demonstrated that overexpressing functional Clu led to disassembly of particles. In addition, we inhibited translation using cycloheximide and puromycin. In contrast to P-bodies, cycloheximide treatment did not disassemble Clu particles yet puromycin treatment did. Surprisingly, cycloheximide stabilized particles under oxidative and nutritional stress. These findings demonstrate that Clu particles display novel dynamics in response to altered ribosome activity and support a model where they function as translation hubs whose assembly heavily depends on the dynamic availability of translating ribosomes.
Tạo bộ sưu tập với mã QR

THƯ VIỆN - TRƯỜNG ĐẠI HỌC CÔNG NGHỆ TP.HCM

ĐT: (028) 36225755 | Email: tt.thuvien@hutech.edu.vn

Copyright @2024 THƯ VIỆN HUTECH