uORF, a regulatory mechanism of the Arabidopsis polyamine oxidase 2.
Mol Biol Rep
; 41(4): 2427-43, 2014.
Article
em En
| MEDLINE
| ID: mdl-24435979
The translational efficiency of an mRNA can be modulated by elements located in the 5'-untranslated region. The flavin-containing polyamine oxidases catabolize oxidative deamination of spermidine and spermine, thus contributing to polyamine homeostasis as well as diverse biological processes through their reaction products. In this study, we characterized the uORF of AtPAO2 gene using the GUS reporter gene. Transgenic lines harboring the native AtPAO2 promoter or the constitutive CaMV 35S promoter show that the uORF negatively affects GUS expression. Exogenous applications of PAs positively modulate GUS expression, thus alleviating the negative effect of AtPAO2 uORF, while treatments with MGBG inhibitor show an opposite effect. Our data suggest that AtPAO2 uORF regulatory mechanism is modulated by polyamines. In addition, we present a comparative in silico study of the uORFs identified in several plant transcripts encoding polyamine oxidases in both mono- and dicotyledonous plants as well as in the Bryophyte Physcomitrella patens. The polyamine oxidase uORF-encoded peptides are conserved among families and share conserved features such as their position, length, and amino acid sequence. Our findings provide new insights into the regulatory mechanism of polyamine oxidase genes and encourage further exploration to assess the biological significance of uORFs in the polyamine catabolic pathway.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fases de Leitura Aberta
/
Arabidopsis
/
Regulação da Expressão Gênica de Plantas
/
Regiões 5' não Traduzidas
/
Oxirredutases atuantes sobre Doadores de Grupo CH-NH
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Mol Biol Rep
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
México
País de publicação:
Holanda