The molecular basis of translation initiation and its regulation in eukaryotes

J Brito Querido, I Díaz-López… - Nature Reviews Molecular …, 2024 - nature.com
The regulation of gene expression is fundamental for life. Whereas the role of transcriptional
regulation of gene expression has been studied for several decades, it has been clear over …

[HTML][HTML] Iron–sulfur clusters as inhibitors and catalysts of viral replication

K Honarmand Ebrahimi, S Ciofi-Baffoni… - Nature Chemistry, 2022 - nature.com
A virus hijacks host cellular machineries and metabolites in order to reproduce. In response,
the innate immune system activates different processes to fight back. Although many aspects …

eIF5B and eIF1A reorient initiator tRNA to allow ribosomal subunit joining

CP Lapointe, R Grosely, M Sokabe, C Alvarado… - Nature, 2022 - nature.com
Translation initiation defines the identity and quantity of a synthesized protein. The process
is dysregulated in many human diseases,. A key commitment step is when the ribosomal …

Universal features of Nsp1-mediated translational shutdown by coronaviruses

K Schubert, ED Karousis, I Ban, CP Lapointe… - Molecular cell, 2023 - cell.com
Summary Nonstructural protein 1 (Nsp1) produced by coronaviruses inhibits host protein
synthesis. The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Nsp1 C …

[HTML][HTML] Structural basis for translation inhibition by MERS-CoV Nsp1 reveals a conserved mechanism for betacoronaviruses

SC Devarkar, M Vetick, S Balaji, IB Lomakin, L Yang… - Cell Reports, 2023 - cell.com
All betacoronaviruses (β-CoVs) encode non-structural protein 1 (Nsp1), an essential
pathogenicity factor that potently restricts host gene expression. Among the β-CoV family …

[HTML][HTML] The structure of a human translation initiation complex reveals two independent roles for the helicase eIF4A

J Brito Querido, M Sokabe, I Díaz-López… - Nature Structural & …, 2024 - nature.com
Eukaryotic translation initiation involves recruitment of the 43S pre-initiation complex to the
5′ end of mRNA by the cap-binding complex eIF4F, forming the 48S translation initiation …

Specific mechanisms of translation initiation in higher eukaryotes: the eIF4G2 story

ED Shestakova, VV Smirnova, IN Shatsky, IM Terenin - Rna, 2023 - rnajournal.cshlp.org
The eukaryotic initiation factor 4G2 (eIF4G2, DAP5, Nat1, p97) was discovered in 1997. Over
the past two decades, dozens of papers have presented contradictory data on eIF4G2 …

Ratchet, swivel, tilt and roll: a complete description of subunit rotation in the ribosome

A Hassan, S Byju, FC Freitas, C Roc… - Nucleic acids …, 2023 - academic.oup.com
Protein synthesis by the ribosome requires large-scale rearrangements of the 'small'subunit
(SSU;∼ 1 MDa), including inter-and intra-subunit rotational motions. However, with nearly …

[HTML][HTML] Molecular basis for recognition and deubiquitination of 40S ribosomes by Otu2

K Ikeuchi, N Ivic, R Buschauer, J Cheng… - Nature …, 2023 - nature.com
In actively translating 80S ribosomes the ribosomal protein eS7 of the 40S subunit is
monoubiquitinated by the E3 ligase Not4 and deubiquitinated by Otu2 upon ribosomal …

[HTML][HTML] Visualization of translation reorganization upon persistent ribosome collision stress in mammalian cells

J Fedry, J Silva, M Vanevic, S Fronik, Y Mechulam… - Molecular cell, 2024 - cell.com
Aberrantly slow ribosomes incur collisions, a sentinel of stress that triggers quality control,
signaling, and translation attenuation. Although each collision response has been studied in …