Last week @science.org mRNA initiation and termination are spatially coordinated | Science www.science.org/doi/10.1126/... from @anafiszbein.bsky.social @athmapai.bsky.social et al.
Thrilled to share our work on transcription initiation and termination being spatially coordinated out today in Science! www.science.org/doi/10.1126/...
Thrilled to share our vision of the future of splicing, out today in
Nature Reviews Molecular Cell Biology! We think splicing-based therapeutics are ready to cut into the future of personalized medicine www.nature.com/articles/s41...
Special shout-out to first author @GyeungYun_Kim
and co-authors @__ccarroll, @thetruezach, and Mustafa Tuncay
Similarly, in the sea, an upstream boat can prepare the waters so a downstream boat can embark more efficiently—if someone like U1 snRNP shows the way
Our findings support a model in which U1 snRNP favors productive elongation from upstream promoters, triggering downstream promoter activation by destabilizing nucleosomes and promoting promoter escape
A gene-specific U1 snRNP that inhibits a premature polyadenylation site can restore downstream promoter activation
By activating premature polyadenylation sites in transcripts originating from upstream promoters, U1 snRNP inhibition increases RNAPII promoter-proximal pausing and reduces chromatin accessibility at downstream internal promoters
Similarly, premature termination of upstream transcription—before RNA Polymerase II initiated upstream can reach downstream promoters—using the dCas9 system also reduces expression from downstream internal promoters
U1 snRNP inhibition decreases transcription overall, but especially in downstream internal promoters of genes that contain a premature polyadenylation site in between two alternative promoters
We show that downstream internal promoters are often highly active, even though they typically contain weaker promoter-like sequences
Very excited to share our new paper out now in
@MolecularCell. We show how U1 snRNP -a well-known splicing factor- regulates the activity of alternative promoters in human cells www.cell.com/molecular-ce...
Proud to introduce our lab’s very first PhD graduate, Dr. Kim (@GyeungYun_Kim)! He defended his thesis today—the same day his first-author paper hit the cover of @MolecularCell. What a way to graduate!
Work done by the one and only x.com/steventmick
who was an undergrad at the time (and now a PhD student in our lab!)
Diving into the evolution of their sequences, we found that human hybrid exons with orthologous first exons in other species usually gained 3' splice sites or whole exons upstream, while those with orthologous internal exons often gained promoter elements 5/6
Surprisingly, transcription start sites of hybrid exons are typically centered at the 3' splice site, suggesting tight coupling between splicing and transcription initiation 4/6
We identified more than 80,000 human hybrid first-internal exons. We found they have strong 3' splice sites, and often possess a relaxed chromatin state, allowing transcription initiation within the gene body 3/6
We employed a deep learning pipeline to dissect the sequence features governing the co-regulation of transcription initiation and splicing in hybrid exons-those exons that serve as first or internal exons in different transcripts 2/6
Super excited to see our work on hybrid exon evolution out at @narjournal.bsky.social! academic.oup.com/nar/advance-... 1/6
Migrating here from x.com/anafiszbein. Check out all previous posts from the lab there!
