Splicing of an intervening sequence by protein-free human snRNAs.

Abstract:

:Significant structural and mechanistic similarities between the spliceosomal snRNAs and catalytically critical domains of self-splicing group II introns have led to the hypothesis that the spliceosomes and group II introns may be evolutionarily related. We have previously shown that in vitro-transcribed, protein-free U6 and U2 snRNAs can catalyze a two-step splicing reaction in trans on two short RNA oligonucleotides that is identical to the splicing reactions performed by many self-splicing group II introns. Here we show that the same two snRNAs can perform splicing in cis by removal of an intervening sequence from a model substrate. These results prove that the protein-free snRNAs are competent to perform splicing on pre-mRNAs and further strengthen the possibility of an evolutionary relationship to group II introns.

journal_name

RNA Biol

journal_title

RNA biology

authors

Jaladat Y,Zhang B,Mohammadi A,Valadkhan S

doi

10.4161/rna.8.3.15386

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

372-7

issue

3

eissn

1547-6286

issn

1555-8584

pii

15386

journal_volume

8

pub_type

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