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. 1992 Apr 25;20(8):1959–1965. doi: 10.1093/nar/20.8.1959

The major RNA in prosomes of HeLa cells and duck erythroblasts is tRNA(Lys,3).

H G Nothwang 1, O Coux 1, G Keith 1, I Silva-Pereira 1, K Scherrer 1
PMCID: PMC312312  PMID: 1579498

Abstract

Two-dimensional gel electrophoresis of HeLa cell prosomal RNAs, 3'-end labeled by RNA ligase, revealed one prominent spot. Determination of a partial sequence at the 3'-end indicated full homology to the 18 nucleotides at the 3'-end of tRNA(Lys,3) from rabbit, the bovine and the human species. An oligonucleotide complementary to the 3'-end of tRNA(Lys,3) hybridized on Northern blots with prosomal RNA from both HeLa cells and duck erythroblasts. In two-dimensional PAGE, the major pRNA of HeLa cells co-migrated with bovine tRNA(Lys,3). Reconstitution of the CCA 3'-end of RNA from both human and duck prosomes, by tRNA-nucleotidyl-transferase, confirmed the tRNA character of this type of RNA. Furthermore, it revealed at least one additional tRNA band about 85 nt long among the prosomal RNA from both species. Finally, confirming an original property of prosomal RNA, we show that in vitro synthesized tRNA(Lys,3) hybridizes stably to duck globin mRNA, and to poly(A)(+)- and poly(A)(-)-RNA from HeLa cells.

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Selected References

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