A cDNA clone was isolated from a Xenopus laevis embryo library and sequenced. Primer extension experiments indicated the full-length nature of the insert and the encoded product was identified on a two dimensional gel as ribosomal protein (r-protein) L22. The 510-bp L22 cDNA sequence presents short untranslated regions and a 5'-end polypyrimidine tract found in all other vertebrate r-protein mRNA (rp mRNA) so far analyzed. Both the nucleotide (nt) and the deduced amino acid (aa) sequences have been compared with the homologous sequences from other species. The L22 nt sequence is about 70% similar to the mammalian L27a rp mRNA and about 60% homologous to the Drosophila, Tetrahymena and yeast corresponding mRNAs. The 148-aa sequence presents a higher conservation, being 90% similar to the mammalian sequence and more than 70% to the other species. Expression analysis showed that, both during X. laevis embryogenesis and in X. laevis cultured cells during growth-rate changes, L22 synthesis is translationally regulated. Therefore X. laevis L22 mRNA is a new example of the correlation between the polypyrimidine terminal tract and the translational regulation observed in other rp mRNAs.

Rapanotti, M., Pucci, B., Amaldi, F., Loreni, F. (1995). Xenopus laevis ribosomal protein L22: full-length cDNA sequence and expression analysis. GENE, 154(2), 199-203 [10.1016/0378-1119(94)00873-Q].

Xenopus laevis ribosomal protein L22: full-length cDNA sequence and expression analysis

AMALDI, FRANCESCO;LORENI, FABRIZIO
1995-01-01

Abstract

A cDNA clone was isolated from a Xenopus laevis embryo library and sequenced. Primer extension experiments indicated the full-length nature of the insert and the encoded product was identified on a two dimensional gel as ribosomal protein (r-protein) L22. The 510-bp L22 cDNA sequence presents short untranslated regions and a 5'-end polypyrimidine tract found in all other vertebrate r-protein mRNA (rp mRNA) so far analyzed. Both the nucleotide (nt) and the deduced amino acid (aa) sequences have been compared with the homologous sequences from other species. The L22 nt sequence is about 70% similar to the mammalian L27a rp mRNA and about 60% homologous to the Drosophila, Tetrahymena and yeast corresponding mRNAs. The 148-aa sequence presents a higher conservation, being 90% similar to the mammalian sequence and more than 70% to the other species. Expression analysis showed that, both during X. laevis embryogenesis and in X. laevis cultured cells during growth-rate changes, L22 synthesis is translationally regulated. Therefore X. laevis L22 mRNA is a new example of the correlation between the polypyrimidine terminal tract and the translational regulation observed in other rp mRNAs.
1995
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore BIO/11 - BIOLOGIA MOLECOLARE
English
Con Impact Factor ISI
conserved sequence; embryo library; recombinant DNA; ribosome; translational control
Rapanotti, M., Pucci, B., Amaldi, F., Loreni, F. (1995). Xenopus laevis ribosomal protein L22: full-length cDNA sequence and expression analysis. GENE, 154(2), 199-203 [10.1016/0378-1119(94)00873-Q].
Rapanotti, M; Pucci, B; Amaldi, F; Loreni, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/48151
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