Send to

Choose Destination
EMBO J. 1990 Nov;9(11):3667-73.

The nematode spliced leader RNA participates in trans-splicing as an Sm snRNP.

Author information

Department of Molecular Biology and Microbiology, Case Western Reserve University School of Medicine, Cleveland, OH 44106.


The trans-spliced leader RNA (SL RNA) of nematodes resembles U snRNAs both in cap structure and in the presence of a consensus Sm binding site. We show here that synthetic SL RNA, synthesized by in vitro transcription, is efficiently used as a spliced leader donor in trans-splicing reactions catalyzed by a cell free extract prepared from developing embryos of the parasitic nematode, Ascaris lumbricoides. Efficient utilization of synthetic SL RNA requires a functional Sm binding site. Mutations within the Sm binding sequence that prevent immunoprecipitation by Sm antisera and prevent cap trimethylation abolish trans-splicing. The effect on trans-splicing is not due to undermethylation of the cap structure.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for PubMed Central
Loading ...
Support Center