title: cA lectin gene insertion has the structural features of a transposable element.
abstract: The single gene Le1, coding for soybean seed lectin, was compared to le1, a naturally occurring mutant allele containing a 3.4 kb insertion within its coding region. Le1 is devoid of introns and produces a 1.0 kb mRNA. It codes for a signal sequence of 32 amino acids and a mature protein of 253 amino acids. With the exception of six single-base substitutions, the coding and flanking sequences in le1 are identical with those in the uninterrupted gene. The insertion termini are imperfect inverted repeats flanked by a 3 bp duplication of lectin target DNA. Inverted repeats within the lectin gene are located symmetrically with respect to the insertion site and are homologous to a region of the insertion termini. These molecular traits conform with the structural aspects of transposable elements in other organisms and imply some degree of site specificity.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D001483:Base Sequence; D004251:DNA Transposable Elements; D037102:Lectins / Q000235:genetics*; D009154:Mutation; D009690:Nucleic Acid Conformation; D037121:Plant Lectins; D012091:Repetitive Sequences, Nucleic Acid; D013025:Glycine max
chemical_list: D000596:Amino Acids; D004251:DNA Transposable Elements; D037102:Lectins; D037121:Plant Lectins