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@ARTICLE{Meurs:296113,
author = {R. Meurs and M. De Matos and A. Bothe and N. Guex and T.
Weber$^*$ and A. Teleman$^*$ and N. Ban and D. Gatfield},
title = {{MCTS}2 and distinct e{IF}2{D} roles in u{ORF}-dependent
translation regulation revealed by in vitro re-initiation
assays.},
journal = {The EMBO journal},
volume = {44},
number = {3},
issn = {0261-4189},
address = {Hoboken, NJ [u.a.]},
publisher = {Wiley},
reportid = {DKFZ-2025-00043},
pages = {854-876},
year = {2025},
note = {2025 Feb;44(3):854-876},
abstract = {Ribosomes scanning from the mRNA 5' cap to the start codon
may initiate at upstream open reading frames (uORFs),
decreasing protein biosynthesis. Termination at a uORF can
lead to re-initiation, where 40S subunits resume scanning
and initiate another translation event downstream. The
noncanonical translation factors MCTS1-DENR participate in
re-initiation at specific uORFs, but knowledge of other
trans-acting factors or uORF features influencing
re-initiation is limited. Here, we establish a cell-free
re-initiation assay using HeLa lysates to address this
question. Comparing in vivo and in vitro re-initiation on
uORF-containing reporters, we validate MCTS1-DENR-dependent
re-initiation in vitro. Using this system and ribosome
profiling in cells, we found that knockdown of the
MCTS1-DENR homolog eIF2D causes widespread gene deregulation
unrelated to uORF translation, and thus distinct to
MCTS1-DENR-dependent re-initiation regulation. Additionally,
we identified MCTS2, encoded by an Mcts1 retrogene, as a
DENR partner promoting re-initiation in vitro, providing a
plausible explanation for clinical differences associated
with DENR vs. MCTS1 mutations in humans.},
keywords = {DENR-MCTS1 (Other) / In Vitro Translation (Other) /
Re-Initiation (Other) / eIF2D (Other) / uORF (Other)},
cin = {B140},
ddc = {570},
cid = {I:(DE-He78)B140-20160331},
pnm = {312 - Funktionelle und strukturelle Genomforschung
(POF4-312)},
pid = {G:(DE-HGF)POF4-312},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:39748120},
doi = {10.1038/s44318-024-00347-3},
url = {https://inrepo02.dkfz.de/record/296113},
}