9n2b

Impacts of ribosomal RNA sequence variation on gene expression and phenotype: Cryo-EM structure of the rrsB ribosome (BBB-70S)

spinqualitylabelsall models 9n2b, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9n2b is a 10 chain structure with sequence from Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 2.2Å Ligands: 1MG, 2MA, 2MG, 3TD, 4D4, 4OC, 4SU, 5MC, 5MU, 6MZ, ATP, D2T, FME, G7M, H2U, IAS, K, MA6, MG, OMC, OMG, OMU, PSU, PUT, SPD, UR3, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function RS2_ECOLI Publication Abstract from PubMed Since the framing of the Central Dogma, it has been speculated that physically distinct ribosomes within cells may influence gene expression and cellular physiology. While heterogeneity in ribosome composition has been reported in bacteria, protozoans, fungi, zebrafish, mice and humans, its functional implications remain actively debated. Here, we review recent evidence demonstrating that expression of conserved variant ribosomal DNA (rDNA) alleles in bacteria, mice and humans renders their actively translating ribosome pool intrinsically heterogeneous at the level of ribosomal RNA (rRNA). In this context, we discuss reports that nutrient limitation-induced stress in Escherichia coli leads to changes in variant rRNA allele expression, programmatically altering transcription and cellular phenotype. We highlight that cells expressing ribosomes from distinct operons exhibit distinct drug sensitivities, which can be recapitulated in vitro and potentially rationalized by subtle perturbations in ribosome structure or in their dynamic properties. Finally, we discuss evidence that differential expression of variant rDNA alleles results in different populations of ribosome subtypes within mammalian tissues. These findings motivate further research into the impacts of rRNA heterogeneities on ribosomal function and predict that strategies targeting distinct ribosome subtypes may hold therapeutic potential.This article is part of the discussion meeting issue 'Ribosome diversity and its impact on protein synthesis, development and disease'. Impacts of ribosomal RNA sequence variation on gene expression and phenotype.,Welfer GA, Brady RA, Natchiar SK, Watson ZL, Rundlet EJ, Alejo JL, Singh AP, Mishra NK, Altman RB, Blanchard SC Philos Trans R Soc Lond B Biol Sci. 2025 Mar 6;380(1921):20230379. doi: , 10.1098/rstb.2023.0379. Epub 2025 Mar 6. PMID:40045785 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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