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Chapter category: RNA

SR Proteins and Related Factors in Alternative Splicing

This chapter appears in the following book:

Alternative Splicing
in the Postgenomic Era

Edited by: Benjamin J. Blencowe and Brenton R. Graveley
ISBN: 978-0-387-77373-5
» Get more information about this book at landesbioscience.com «

Chapter authors:
Shengrong Lin and Xiang-Dong Fu


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SR proteins are a family of RNA binding proteins that contain a signature RS domain enriched with serine/arginine repeats. The RS domain is also found in many other proteins, which are collectively referred to as SR‑related proteins. Several prototypical SR proteins are essential splicing factors, but the majority of RS domain‑containing factors are characterized by their ability to alter splice site selection in vitro or in transfected cells. SR proteins and SR‑related proteins are generally believed to modulate splice site selection via RNA recognition motif‑mediated binding to exonic splicing enhancers and RS domain‑mediated protein‑protein and protein‑RNA interactions during spliceosome assembly. However, the biological function of individual RS domain‑containing splicing regulators is complex because of redundant as well as competitive functions, context‑dependent effects and regulation by cotranscriptional and post‑translational events. This chapter will focus on our current mechanistic understanding of alternative splicing regulation by SR proteins and SR‑related proteins and will discuss some of the questions that remain to be addressed in future research.

Shengrong Lin
Department of Cellular and Molecular Medicine, University of California, San Diego

Xiang-Dong Fu
Department of Cellular and Molecular Medicine, University of California, San Diego

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SR Proteins and Related Factors in Alternative Splicing

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