title: Isolation and sequence analysis of a barley alpha-amylase cDNA clone.
abstract: We have isolated a cDNA clone derived from poly(A+) RNA from barley aleurone cells stimulated with gibberellic acid. This cDNA clone contains one open reading frame coding for 438 amino acids. The cloned DNA hybridizes to a poly(A+) RNA species 1550 bases in size, the same size as the most abundant poly(A+) RNA molecules in stimulated cells. RNA complementary to this clone can be translated to make immunoprecipitable alpha-amylase in the wheat germ system and increases about 5-fold in quantity after gibberellic acid stimulation of aleurone cells. In contrast, hybridization experiments using a total cDNA probe demonstrate that the most abundant mRNA population, identical in size with our cloned sequence and presumably that for alpha-amylase, increases at least 17-fold after gibberellic acid stimulation. We therefore infer that there must be at least two populations of alpha-amylase mRNA molecules derived from separate structural genes differently influenced by gibberellic acid in aleurone cells.
mesh_terms: D000595:Amino Acid Sequence; D000681:Amylases / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular; D003062:Codon; D004247:DNA / Q000302:isolation & purification*; D004262:DNA Restriction Enzymes; D005796:Genes; D001467:Hordeum / Q000201:enzymology; D009693:Nucleic Acid Hybridization; D010944:Plants / Q000201:enzymology*; D011061:Poly A / Q000235:genetics; D012313:RNA / Q000235:genetics; D012333:RNA, Messenger / Q000235:genetics; D000516:alpha-Amylases / Q000235:genetics*
chemical_list: D003062:Codon; D012333:RNA, Messenger; D011061:Poly A; D012313:RNA; D004247:DNA; D004262:DNA Restriction Enzymes; D000681:Amylases; D000516:alpha-Amylases