PMID: 9450246Feb 5, 1998Paper

Characteristics of nucleotide sequences flanking the trans-spliced leader SL1 exon in Dirofilaria immitis, Brugia malayi, and Brugia pahangi

The Journal of Veterinary Medical Science
R HarasawaY Hayashi

Abstract

Nucleotide sequences surrounding the trans-spliced leader SL1 exon in the 5S rRNA gene spacer regions of Dirofilaria immitis, Brugia malayi, and B. pahangi were determined after PCR amplification, aligned with the genus Onchocerca for comparison, and used for the prediction of secondary structures. The nucleotide sequence of this region in B. pahangi was first shown in the present study. Hypothetical secondary structures of the spacer region suggested that the SL1 transcript is capable to form a stable stem-loop structure which may render transposition of the SL1 sequence to mRNA molecules. A homologous sequence to Sm-binding site was assigned on a bulge loop. No significant difference was observed in adult worms of D. immitis irrespective of sex or location. No difference was apparent between the two species in genus Brugia.

References

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