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A Single Cell Genomics Atlas of the Drosophila Larval Eye Reveals Distinct Developmental Timelines and Novel Markers for All Photoreceptor Subtypes

Bollepogu Raja, K. K.; Yeung, K.; Shim, Y. K.; Li, Y.; Chen, R.; Mardon, G.

2023-02-14 genomics
10.1101/2023.02.14.528565 bioRxiv
Show abstract

The Drosophila eye is a powerful model system to study principles of cell differentiation, proliferation, survival and morphogenesis. However, a high-resolution single cell genomics resource that accurately captures all major cell types of the larval eye disc and their spatiotemporal relationships is lacking. Here, we report transcriptomic and chromatin accessibility data for all known cell types in the developing eye. Photoreceptors appear as streams of cells that represent dynamic developmental timelines. Photoreceptor subtypes are transcriptionally distinct when they begin to differentiate, but then converge upon a common transcriptome just 24 hours later. We identify novel cell type-specific marker genes, enhancers and potential regulators, as well as genes with distinct R3 or R4 photoreceptor specific expression. Finally, we observe that photoreceptor chromatin accessibility is more permissive than non-neuronal lens-secreting cone cells, which show a more restrictive chromatin profile. This single cell genomics atlas will greatly empower the Drosophila eye as a model system.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.