Hostname: page-component-8448b6f56d-c47g7 Total loading time: 0 Render date: 2024-04-25T02:55:34.538Z Has data issue: false hasContentIssue false

Sorting out the complexity of SR protein functions

Published online by Cambridge University Press:  01 September 2000

Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
Get access


Members of the serine/arginine-rich (SR) protein family have multiple functions in the pre-mRNA splicing reaction. In addition to being required for the removal of constitutively spliced introns, SR proteins can function to regulate alternative splicing both in vitro and in vivo (Ge & Manley, 1990; Krainer et al., 1990a; Fu et al., 1992; Zahler et al., 1993a; Caceres et al., 1994; Wang & Manley, 1995). In the cell, SR proteins migrate from speckles—subnuclear domains that may function as storage sites for certain splicing factors—to sites of active transcription (Misteli et al., 1997; Misteli & Spector, 1999) and some SR proteins have been found to shuttle in and out of the nucleus (Caceres et al., 1998). The subcellular localization of SR proteins can be modulated by phosphorylation (Misteli & Spector, 1998; Misteli et al., 1998) and this undoubtedly underlies some regulated splicing events. However, once in the nucleus and localized to the nascent pre-mRNA, exactly how SR proteins engage the general splicing machinery to recognize specific splice sites is unclear and is an area of intense investigation.

RNA , Volume 6 , Issue 9 , September 2000 , pp. 1197 - 1211
2000 RNA Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)