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. 1985 Sep 25;13(18):6733–6743. doi: 10.1093/nar/13.18.6733

The 5'-flanking regions of three pea legumin genes: comparison of the DNA sequences.

G W Lycett, R R Croy, A H Shirsat, D M Richards, D Boulter
PMCID: PMC321989  PMID: 2997721

Abstract

Approximately 1200 nucleotides of sequence data from the promoter and 5'-flanking regions of each of three pea (Pisum sativum L.) legumin genes (legA, legB and legC) are presented. The promoter regions of all three genes were found to be identical including the "TATA box", and "CAAT box', and sequences showing homology to the SV40 enhancers. The legA sequence begins to diverge from the others about 300bp from the start codon, whereas the other two genes remain identical for another 550bp. The regions of partial homology exhibit deletions or insertions and some short, comparatively well conserved sequences. The significance of these features is discussed in terms of evolutionary mechanisms and their possible functional roles. The legC gene contains a region that may potentially form either of two mutually exclusive stem-loop structures, one of which has a stem 42bp long, which suggests that it could be fairly stable. We suggest that a mechanism of switching between such alternative structures may play some role in gene control or may represent the insertion of a transposable element.

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Selected References

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