title: Nucleotide sequence and expression of the glucoamylase-encoding gene (glaA) from Aspergillus oryzae.
abstract: The glucoamylase-encoding gene (glaA) from Aspergillus oryzae was cloned using its cDNA as a probe, which had been isolated previously. From comparison of nucleotide (nt) sequences of genomic clones with its cDNA, the glaA gene was found to contain four short putative introns, 45-56 nt in length. The A. oryzae glaA gene shared 62% homology at the nt level with the A. niger glaA gene with the four introns located at the same position. The 5'-flanking region contained a TATA box at nt-72 from the start codon, and two putative CAAT sequences at nt-87 and -331. Genomic Southern analysis and physical mapping showed that the glaA gene is located on the smallest chromosome (3.4 Mb) of six separated bands of chromosomes. Clones containing the glaA gene, when re-introduced intro A. oryzae, resulted in a three- to eightfold increase in glucoamylase activity.
authors.affiliation: National Research Institute of Brewing, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hata
authors.forename: K
authors.initials: K
authors.lastname: Tsuchiya
authors.forename: K
authors.initials: K
authors.lastname: Kitamoto
authors.forename: K
authors.initials: K
authors.lastname: Gomi
authors.forename: C
authors.initials: C
authors.lastname: Kumagai
authors.forename: G
authors.initials: G
authors.lastname: Tamura
authors.forename: S
authors.initials: S
authors.lastname: Hara
mesh_terms: D000595:Amino Acid Sequence; D001236:Aspergillus oryzae / Q000201:enzymology* / Q000235:genetics; D001483:Base Sequence; D015139:Blotting, Southern; D003001:Cloning, Molecular; D015870:Gene Expression / Q000235:genetics; D005800:Genes, Fungal; D005087:Glucan 1,4-alpha-Glucosidase / Q000235:genetics*; D007438:Introns / Q000235:genetics; D008969:Molecular Sequence Data; D014170:Transformation, Genetic / Q000235:genetics
chemical_list: D005087:Glucan 1,4-alpha-Glucosidase