title: Aspartic proteinase genes in the Brassicaceae Arabidopsis thaliana and Brassica napus.
abstract: Active aspartic proteinase is isolated from Brassica napus seeds and the peptide sequence is used to generate primers for PCR. We present here cDNA and genomic clones for aspartic proteinases from the closely related Brassicaceae Arabidopsis thaliana and Brassica napus. The Arabidopsis cDNA represents a single gene, while Brassica has at least 4 genes. Like other plant aspartic proteases, the two Brassicaceae enzymes contain an extra protein domain of about 100 amino acids relative to the mammalian forms. The intron/exon arrangement in the Brassica genomic clone is significantly different from that in mammalian genes. As the proteinase is isolated from seeds, the same tissue where 2S albumins are processed, this implies expression of one of the aspartic proteinase genes there.
authors.affiliation: Plant Genetic Systems, Gent, Belgium.
authors.forename: K
authors.initials: K
authors.lastname: D'Hondt
authors.forename: S
authors.initials: S
authors.lastname: Stack
authors.forename: S
authors.initials: S
authors.lastname: Gutteridge
authors.forename: J
authors.initials: J
authors.lastname: Vandekerckhove
authors.forename: E
authors.initials: E
authors.lastname: Krebbers
authors.forename: S
authors.initials: S
authors.lastname: Gal
mesh_terms: D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000201:enzymology* / Q000235:genetics*; D016282:Aspartic Acid Endopeptidases / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics*; D015139:Blotting, Southern; D001937:Brassica / Q000201:enzymology* / Q000235:genetics*; D017931:DNA Primers; D017343:Genes, Plant; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012639:Seeds; D017386:Sequence Homology, Amino Acid
chemical_list: D017931:DNA Primers; D016282:Aspartic Acid Endopeptidases