Posttranscriptional Gene Regulation by Spatial Rearrangement of the 3' Untranslated Region
Affiliations
Translation termination at premature termination codons (PTCs) triggers degradation of the aberrant mRNA, but the mechanism by which a termination event is defined as premature is still unclear. Here we show that the physical distance between the termination codon and the poly(A)-binding protein PABPC1 is a crucial determinant for PTC recognition in human cells. "Normal" termination codons can trigger nonsense-mediated mRNA decay (NMD) when this distance is extended; and vice versa, NMD can be suppressed by folding the poly(A) tail into proximity of a PTC or by tethering of PABPC1 nearby a PTC, indicating an evolutionarily conserved function of PABPC1 in promoting correct translation termination and antagonizing activation of NMD. Most importantly, our results demonstrate that spatial rearrangements of the 3' untranslated region can modulate the NMD pathway and thereby provide a novel mechanism for posttranscriptional gene regulation.
Cytoplasmic mRNA decay and quality control machineries in eukaryotes.
Dowdle M, Lykke-Andersen J Nat Rev Genet. 2025; .
PMID: 39870755 DOI: 10.1038/s41576-024-00810-1.
Bioinformatics-driven refinement of the commonly used TPI nonsense-mediated decay reporter system.
Peter L, Walotka L, Ptok J, Meyer C, Schuller D, Schaal H RNA. 2024; 31(1):32-42.
PMID: 39414360 PMC: 11648928. DOI: 10.1261/rna.080134.124.
Barbarin-Bocahu I, Ulryck N, Rigobert A, Ruiz Gutierrez N, Decourty L, Raji M PLoS Biol. 2024; 22(9):e3002821.
PMID: 39331656 PMC: 11463774. DOI: 10.1371/journal.pbio.3002821.
The impact of mRNA poly(A) tail length on eukaryotic translation stages.
Biziaev N, Shuvalov A, Salman A, Egorova T, Shuvalova E, Alkalaeva E Nucleic Acids Res. 2024; 52(13):7792-7808.
PMID: 38874498 PMC: 11260481. DOI: 10.1093/nar/gkae510.
Post-transcriptional Regulation of Gene Expression via Unproductive Splicing.
Zavileyskiy L, Pervouchine D Acta Naturae. 2024; 16(1):4-13.
PMID: 38698955 PMC: 11062102. DOI: 10.32607/actanaturae.27337.