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. 1988 Jan;7(1):231–237. doi: 10.1002/j.1460-2075.1988.tb02804.x

7SL RNA from Schizosaccharomyces pombe is encoded by a single copy essential gene

Véronique Ribes 1, Pierre Dehoux 1, David Tollervey 1
PMCID: PMC454262  PMID: 16453822

Abstract

We have identified an abundant ribonucleoprotein particle from Schizosaccharomyces pombe with properties related to those of the vertebrate signal recognition particle (SRP), including cytoplasmic localization, association with microsomes and ribosomes at low, but not high, salt concentrations and high resistance to micrococcal nuclease. The 256-nucleotide RNA component carries a 5'-triphosphate group and shows close secondary structure, and limited primary sequence homology to vertebrate 7SL RNA. 7SL-like RNAs were also detected in a number of other fungi. The single copy gene (SRP7) encoding S.pombe 7SL was disrupted by insertion of a transposon carrying the selective marker LEU2, and the disrupted gene was used to replace one chromosomal SRP7 gene in a diploid strain. Haploid srp7[unk] strains fail to germinate.

Keywords: ribonucleoprotein, Schizosaccharomyces pombe, signal recognition particle, SRP7, LEU2

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