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. 1991 Mar 25;19(6):1305–1310. doi: 10.1093/nar/19.6.1305

Cis and trans-acting elements involved in the activation of Arabidopsis thaliana A1 gene encoding the translation elongation factor EF-1 alpha.

C Curie 1, T Liboz 1, C Bardet 1, E Gander 1, C Médale 1, M Axelos 1, B Lescure 1
PMCID: PMC333858  PMID: 1840652

Abstract

In A. thaliana the translation elongation factor EF-1 alpha is encoded by a small multigenic family of four members (A1-A4). The A1 gene promoter has been dissected and examined in a transient expression system using the GUS reporter gene. Deletion analysis has shown that several elements are involved in the activation process. One cis-acting domain, the TEF 1 box, has been accurately mapped 100 bp upstream of the transcription initiation site. This domain is the target for trans-acting factors identified in nuclear extracts prepared from A. thaliana. Homologies are found between the TEF 1 box and sequences present at the same location within the A2, A3 and A4 promoters. This observation, together with those obtained from gel retardation assays performed using DNA fragments from the A4 promoter, suggest that the activation process mediated by the TEF 1 element is conserved among the A. thaliana EF-1 alpha genes. Analysis of nearly full length cDNA clones has shown that in addition to a single intron located within the coding region, the A1 gene contains a second intron located within the 5' non coding region. Such an intron is also present within the A2, A3 and A4 genes. This 5' intervening sequence appears to be essential to obtain a maximum GUS activity driven by the A1 gene promoter.

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Selected References

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