Pre-spliceosome formation in S.pombe requires a stable complex of SF1-U2AF59-U2AF23

Tao Huang, Josep Vilardell, Charles C. Query

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

We have initiated a biochemical analysis of splicing complexes in extracts from the fission yeast Schizosaccharomyces pombe. Extracts of S.pombe contain high levels of the spliceosome-like U2/5/6 tri-snRNP, which dissociates into mono-snRNPs in the presence of ATP, and supports binding of U2 snRNP to the 3′ end of introns, yielding a weak ATP-independent E complex and the stable ATP-dependent complex A. The requirements for S.pombe complex A formation (pre-mRNA sequence elements, protein splicing factors, SF1/BBP and both subunits of U2AF) are analogous to those of mammalian complex A. The S.pombe SF1/BBP, U2AF59 and U2AF23 are tightly associated in a novel complex that is required for complex A formation. This pre-formed SF1-U2AF59-U2AF23 complex may represent a streamlined mechanism for recognition of the branch site, pyrimidine tract and 3′ splice site at the 3′ end of introns.

Original languageEnglish (US)
Pages (from-to)5516-5526
Number of pages11
JournalEMBO Journal
Volume21
Issue number20
DOIs
StatePublished - Oct 15 2002

Fingerprint

Spliceosomes
Schizosaccharomyces
Adenosine Triphosphate
Introns
U2 Small Nuclear Ribonucleoproteins
Small Nuclear Ribonucleoproteins
RNA Splice Sites
RNA Precursors
Yeast
Protein Splicing
Complex Mixtures
Proteins
4-boronic acid benzophenone

Keywords

  • S.pombe
  • SF1/BBP
  • U2/5/6 tri-snRNP
  • U2AF/U2 SnRNP

ASJC Scopus subject areas

  • Genetics
  • Cell Biology

Cite this

Pre-spliceosome formation in S.pombe requires a stable complex of SF1-U2AF59-U2AF23 . / Huang, Tao; Vilardell, Josep; Query, Charles C.

In: EMBO Journal, Vol. 21, No. 20, 15.10.2002, p. 5516-5526.

Research output: Contribution to journalArticle

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