Related Experiment Video
Updated: Aug 13, 2026

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
Published on: August 9, 2019
Novel modes of splicing repression by PTB
Rachel Spellman1, Christopher W J Smith
1Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, UK.
Abstract:
Polypyrimidine-tract-binding protein (PTB) is a repressive regulator of alternative splicing. Models for PTB activity have ranged from simple binding competition with splicing factor U2AF(65) at regulated polypyrimidine tracts to looping out of repressed exons by binding of PTB to flanking sites. Structural analysis of PTB bound to RNA suggests how PTB monomers can induce loops, but two recent publications indicate that repression by PTB involves more than just binding to RNA.
Related Concept Videos
Alternative RNA Splicing
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Alternative RNA Splicing
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
Pre-mRNA Processing: RNA Splicing
RNA Splicing
RNA Splicing
Chromatin Structure Regulates pre-mRNA Processing
The chromatin structure, especially...

