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Tabula Sapiens reveals the non-coding RNA landscape across 22 human organs and tissues

Authors

Lee, J.; Mantri, M.; Murthy, K.; Seeker, L. A.; Crowley, G.; Jones, R. C.; Tabula Sapiens Consortium, ; Quake, S. R.

Abstract

The biological significance of non-coding RNAs has been increasingly appreciated as their roles in various cellular processes are uncovered. However, single-cell transcriptomic profiling of human samples has focused primarily on protein-coding genes by targeting polyadenylated RNA transcripts, leaving the expression patterns of non-coding RNA underexplored. Here, we expand Tabula Sapiens to the non-coding transcriptome with single-cell and single-nucleus total RNA sequencing across 22 human organs and tissues. By simultaneously profiling both polyadenylated and non-polyadenylated transcripts, the resulting dataset enables joint analysis of the protein-coding and non-coding transcriptomes at single-cell and subcellular resolution. Using these data, we assessed the cell type specificity of non-coding genes and found that a greater proportion of non-coding genes are differentially expressed by single cell types compared to protein-coding genes. We then compared single-cell and single-nucleus data from the same samples to infer subcellular localization patterns, revealing cell type-dependent nuclear and cytoplasmic enrichment of specific non-coding RNAs. Next, we showed that tRNA repertoires are cell type-specific and that this specificity is not simply explained by differences in codon usage across cell types. Finally, we characterized dynamic expression patterns of non-coding RNAs across the cell cycle and senescence-associated cell states, identifying non-coding genes with putative roles in cell division and growth arrest. Our work establishes a resource for investigating the landscape of non-coding RNAs across a diverse set of human tissues and cell types.

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Cheeky Summary

The Tabula Sapiens sequel goes rogue on non-coding RNAs via total RNA-seq, exposing cell-type-specific tRNA drama, nuclear-cytoplasmic hide-and-seek, and senescence plot twists that make protein-coding genes look like the boring straight men in the transcriptome comedy.

Community Buzz

Posted by molecular biologist Alejandro Montenegro (@aemonten) and picked up for expanding the human cell atlas into non-coding territory; sparked interest among single-cell and RNA biologists for subcellular localization and cell-cycle findings

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