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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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The 5' untranslated region of the At-P5R gene is involved in both transcriptional and post-transcriptional regulation.

The steady-state level of transcripts coding for the pyrroline-5-carboxylate reductase of Arabidopsis (At-P5R) increased under salt and heat stress, mainly because of an enhanced mRNA stability. However, the At-P5R protein level was not induced, and its translation was inhibited at initiation stage and probably also at later stages. Replacement of the 5' untranslated region (5'UTR) and beta-glucuronidase (gus) fusion analysis revealed that the first 92 bp region of the At-P5R 5'UTR was sufficient to mediate transcript stabilization and translation inhibition during salt and heat stresses. Furthermore, the first 92 bp region of the At-P5R 5'UTR was also involved in transcription efficiency in a promoter-dependent manner. The results demonstrated that the stress regulation of At-P5R is complex and involves the 5'UTR which acts at three levels, partly in opposing directions.[1]

References

  1. The 5' untranslated region of the At-P5R gene is involved in both transcriptional and post-transcriptional regulation. Hua, X.J., Van de Cotte, B., Van Montagu, M., Verbruggen, N. Plant J. (2001) [Pubmed]
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