title: A gibberellin-regulated gene from wheat with sequence homology to cathepsin B of mammalian cells.
abstract: A previous report described several cDNAs corresponding to mRNAs which accumulated in wheat aleurone layers treated with gibberellic acid (GA) (Baulcombe and Buffard, 1983). The protein sequence deduced from one of these clones (2529) has extensive similarity to the thiol protease, cathepsin B from mammalian cells. Southern analysis of wheat DNA has shown that the 2529 mRNA is encoded by a small family of genes carried on the group 4 chromosome. The nucleotide sequence of a member of the gene family expressed at a low level in aleurone layers and the use of a primer extension assay to identify a clone of a member of the gene family producing an abundant mRNA are reported. The 2529 mRNA accumulates in the scutellum and the aleurone layer of germinating grains where its expression is regulated by GA. In the scutellum the expression was restricted to the parenchyma, suggesting that the 2529 product may have a role other than for mobilization of the endosperm.
authors.affiliation: Sainsbury Laboratory, Norwich Research Park, Colney, UK.
authors.forename: F J
authors.initials: FJ
authors.lastname: Cejudo
authors.forename: G
authors.initials: G
authors.lastname: Murphy
authors.forename: C
authors.initials: C
authors.lastname: Chinoy
authors.forename: D C
authors.initials: DC
authors.lastname: Baulcombe
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002401:Cathepsin B / Q000235:genetics* / Q000302:isolation & purification; D002874:Chromosome Mapping; D003546:Cysteine Endopeptidases / Q000145:classification / Q000235:genetics; D005786:Gene Expression Regulation; D017343:Genes, Plant / Q000235:genetics*; D005875:Gibberellins / Q000494:pharmacology*; D017403:In Situ Hybridization; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014018:Tissue Distribution; D014158:Transcription, Genetic / Q000187:drug effects; D014908:Triticum / Q000235:genetics*
chemical_list: D005875:Gibberellins; D012333:RNA, Messenger; D003546:Cysteine Endopeptidases; D002401:Cathepsin B