The Role of the Human Nuclear Poly(A) Binding Protein in RNA Decay
dc.contributor.advisor | Green, Carla B. | en |
dc.contributor.committeeMember | Buszczak, Michael | en |
dc.contributor.committeeMember | Liu, Qinghua | en |
dc.contributor.committeeMember | Conrad, Nicholas | en |
dc.creator | Bresson, Stefan | en |
dc.date.accessioned | 2017-06-02T15:24:57Z | |
dc.date.available | 2017-06-02T15:24:57Z | |
dc.date.created | 2015-05 | |
dc.date.issued | 2015-01-26 | |
dc.date.submitted | May 2015 | |
dc.date.updated | 2017-06-02T15:13:08Z | |
dc.description.abstract | Control of nuclear RNA stability is an important determinant of gene expression, but the factors involved in nuclear RNA decay remain largely unknown in higher eukaryotes. Here, I describe our work showing that polyadenosine (poly(A)) tails can stimulate transcript decay in the nucleus of human cells, a function mediated by the ubiquitous nuclear poly(A) binding protein PABPN1. We show that PABPN1 is required for the degradation of a viral nuclear noncoding RNA as well as an inefficiently exported human mRNA. Importantly, the targeting of RNAs to this decay pathway requires the PABPN1 and poly(A) polymerase (PAP)-dependent extension of the poly(A) tail. Nuclear transcripts with longer poly(A) tails are then selectively degraded by components of the nuclear exosome. I also describe our work showing that PABPN1 and PAP are required for the degradation of a variety of nuclear-retained long noncoding RNAs. Taken together, this work uncovers an important pathway in the turnover of RNAs in the nucleus. | en |
dc.format.mimetype | application/pdf | en |
dc.identifier.oclc | 988778236 | |
dc.identifier.uri | https://hdl.handle.net/2152.5/4108 | |
dc.language.iso | en | en |
dc.subject | Cell Nucleus | en |
dc.subject | Poly A | en |
dc.subject | Poly(A)-Binding Protein I | en |
dc.subject | RNA Stability | en |
dc.title | The Role of the Human Nuclear Poly(A) Binding Protein in RNA Decay | en |
dc.type | Thesis | en |
dc.type.material | text | en |
thesis.degree.department | Graduate School of Biomedical Sciences | en |
thesis.degree.discipline | Biological Chemistry | en |
thesis.degree.grantor | UT Southwestern Medical Center | en |
thesis.degree.level | Doctoral | en |
thesis.degree.name | Doctor of Philosophy | en |