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Content Provider | Directory of Open Access Journals (DOAJ) |
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Author | Morgan Thompson Ryan Bixby Robert Dalton Alexa Vandenburg John A. Calarco Adam D. Norris |
Abstract | Single-cell transcriptomes are established by transcription factors (TFs), which determine a cell's gene-expression complement. Post-transcriptional regulation of single-cell transcriptomes, and the RNA binding proteins (RBPs) responsible, are more technically challenging to determine, and combinatorial TF-RBP coordination of single-cell transcriptomes remains unexplored. We used fluorescent reporters to visualize alternative splicing in single Caenorhabditis elegans neurons, identifying complex splicing patterns in the neuronal kinase sad-1. Most neurons express both isoforms, but the ALM mechanosensory neuron expresses only the exon-included isoform, while its developmental sister cell the BDU neuron expresses only the exon-skipped isoform. A cascade of three cell-specific TFs and two RBPs are combinatorially required for sad-1 exon inclusion. Mechanistically, TFs combinatorially ensure expression of RBPs, which interact with sad-1 pre-mRNA. Thus a combinatorial TF-RBP code controls single-neuron sad-1 splicing. Additionally, we find 'phenotypic convergence,' previously observed for TFs, also applies to RBPs: different RBP combinations generate similar splicing outcomes in different neurons. |
e-ISSN | 2050084X |
DOI | 10.7554/eLife.46726 |
Journal | eLife |
Volume Number | 8 |
Language | English |
Publisher | eLife Sciences Publications Ltd |
Publisher Date | 2019-01-01 |
Publisher Place | United Kingdom |
Access Restriction | Open |
Subject Keyword | Medicine Science Biology (general) Rna Splicing Single Neuron |
Content Type | Text |
Resource Type | Article |
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