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Articles by Anat Bashan
A small nucleolar RNA dictates the structure and function of translating ribosomes in Leishmania
Abstract The most common rRNA modification is 2’-O-methylation. Here, we determine the landscape of 2’-O-methylation in Leishmania, a parasite that cycles between two different hosts, insect and mammalian. We find two 2’-O-methylated positions that are differentially modified during the parasite’s two life stages.
Structural and molecular basis of specialized translation mediated by the ribosome mRNA-binding channel
Abstract The ribosome mRNA channel is central to translation, yet its role in regulatory mechanisms remains unclear. Using cryo-EM of human ribosomal complexes bound to Kozak and TISU mRNAs from wild-type (WT) and RPS26/eS26 mutant (RPS26dC) cells, we demonstrate that both RPS26/eS26 and mRNA adopt distinct conformations, explaining the opposing effects of RPS26dC on their activity.
N1-Methylpseudouridine directly modulates translation dynamics - Nature
Abstract The considerable success of mRNA vaccines against SARS-CoV-2 has underscored the potential of synthetic mRNA as a transformative biomedical technology1. A critical feature of this approach is the incorporation of the modified nucleoside N1-methylpseudouridine (m1Ψ), which enhances antigen expression while reducing immunogenicity2,3,4,5. However, a comprehensive understanding of how m1Ψ influences translation remains incomplete.
A single pseudouridine on rRNA regulates ribosome structure and function in the mammalian parasite Trypanosoma brucei - Nature Communications
Abstract Trypanosomes are protozoan parasites that cycle between insect and mammalian hosts and are the causative agent of sleeping sickness. Here, we describe the changes of pseudouridine (Ψ) modification on rRNA in the two life stages of the parasite using four different genome-wide approaches. CRISPR-Cas9 knock-outs of all four snoRNAs guiding Ψ on helix 69 (H69) of the large rRNA subunit were lethal. A single knock-out of a snoRNA guiding Ψ530 on H69 altered the composition of the 80S monosome.
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