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  • Title: Structural characterization of the early indoleacetic acid-inducible genes, PS-IAA4/5 and PS-IAA6, of pea (Pisum sativum L.).
    Author: Oeller PW, Keller JA, Parks JE, Silbert JE, Theologis A.
    Journal: J Mol Biol; 1993 Oct 20; 233(4):789-98. PubMed ID: 8411182.
    Abstract:
    Two early auxin-inducible genes (PS-IAA4/5 and PSIAA6) from pea were cloned using previously isolated complementary DNA sequences. They are present in single copy per haploid genome, and are members of a large divergent multigene family that encodes similar proteins. The genes were structurally characterized and sequence analysis of their 5'-flanking regions revealed the presence of several highly conserved sequences found in various auxin-regulated genes from other plant species. Their coding regions are interrupted by three and two introns, respectively. Introns two and three of PS-IAA4/5 and introns one and two of PS-IAA6 are located in identical positions. These genes encode proteins of 189 (21,036 Da) and 179 (20,330 Da) residues that are 46% identical. They also share a significant degree of identity (42 to 80%) with other proteins encoded by auxin regulated genes in soybean, mungbean and Arabidopsis thaliana. All proteins contain four conserved domains ranging in size from 9 to 43 amino acids. Their most prominent feature is the presence of a highly charged N terminus consisting of two clusters of acidic residues separated by a cluster of basic amino acids.
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