title: Structural and functional analysis of the amdR regulatory gene of Aspergillus oryzae.
abstract: We have isolated the Aspergillus oryzae homologue of the amdR regulatory gene of Aspergillus nidulans by cross hybridization. Sequence analysis and functional studies have shown that the amdR genes are highly conserved and functionally interchangeable between the two species. The homology between the two genes extends throughout most of the coding sequences, including sequences encoding the DNA-binding domain and putative activation domains. Two regions of nonconserved sequence were also identified. Studies using various amdS::lacZ fusion constructs indicate that the A. oryzae gene product binds similar sequences and responds to inducer in a similar manner to the A. nidulans protein. Inactivation of the A. oryzae gene results in the inability to grow on gamma-amino-butyric acid (GABA) as a carbon and/or nitrogen source indicating that GABA utilization is amdR-dependent in A. oryzae as it is in A. nidulans.
authors.affiliation: Molecular and Evolutionary Systematics Group, Research School of Biological Sciences, Australian National University, Canberra.
authors.forename: X W
authors.initials: XW
authors.lastname: Wang
authors.forename: M J
authors.initials: MJ
authors.lastname: Hynes
authors.forename: M A
authors.initials: MA
authors.lastname: Davis
mesh_terms: D000595:Amino Acid Sequence; D001233:Aspergillus nidulans / Q000235:genetics / Q000378:metabolism; D001236:Aspergillus oryzae / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D015139:Blotting, Southern; D003001:Cloning, Molecular; D004271:DNA, Fungal; D005800:Genes, Fungal; D005809:Genes, Regulator; D005816:Genetic Complementation Test; D008969:Molecular Sequence Data; D017386:Sequence Homology, Amino Acid; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
chemical_list: D004271:DNA, Fungal; D005680:gamma-Aminobutyric Acid