Alternative splicing of Pot1 (Protection of telomere)-like genes in Arabidopsis thaliana

Akinori Tani, Minoru Murata

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The Pot1 (Protection of telomere 1) is a G-rich single-stranded telomeric DNA binding protein, identified first in Schizosaccharomyces pombe, and shown to play an important role in stabilizing chromosomes. Pot1-like proteins or their encoding genes have been identified from yeasts to mammals. Based on the N-terminal amino acid sequences of fission yeast and human Pot1, two Pot1-like proteins (AtPOT1-1 and AtPOT1-2) have been identified in Arabidopsis thaliana, but neither of them has been characterized yet. In this study, we amplified their full-length cDNAs by RT-PCR and found three different variants for AtPOT1-1 and two for AtPOT1-2 genes, suggesting that they are exposed to alternative splicing. Alternative splicing also occurs in human Pot1, and only one out of five splicing variants had tissue specificity. However, no tissue specificity was found for any variants of the AtPOT1-1 and AtPOT1-2 genes among buds, flowers, leaves, roots, stems, siliques and cultured cells. Northern blot hybridization indicated that AtPOT1-1 expresses more in meristematic tissues than in vegetative tissues. By western blot analysis, we found that the antibody made against the N-terminal amino acids of AtPOT1-1 recognized three different polypeptides, indicating that all three variants are being translated in Arabidopsis.

Original languageEnglish
Pages (from-to)41-48
Number of pages8
JournalGenes and Genetic Systems
Volume80
Issue number1
DOIs
Publication statusPublished - Feb 2005

Keywords

  • Alternative splicing
  • Arabidopsis thaliana
  • Pot1
  • Telomere
  • Telomere binding protein

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics

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