title: Inducer-dependent nuclear localization of a Zn(II)(2)Cys(6) transcriptional activator, AmyR, in Aspergillus nidulans.
abstract: AmyR is a Zn(II)(2)Cys(6) transcriptional activator that regulates expression of the amylolytic genes in Aspergillus species. Subcellular localization studies of GFP-fused AmyR in A. nidulans revealed that the fusion protein preferentially localized to the nucleus in response to isomaltose, the physiological inducer of the amylolytic genes. The C-terminal domains of AmyR, designated MH3 (residues 419-496) and MH4 (residues 516-542), were essential for sensing the inducing stimulus and regulating the subcellular localization. The MH2 domain (residues 234-375) located in the middle of AmyR was required for transcriptional activation of the target genes, and the nuclear localization signals were identified within the N-terminal Zn(II)(2)Cys(6) DNA binding motif.
authors.affiliation: Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Aichi, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Makita
authors.forename: Yoko
authors.initials: Y
authors.lastname: Katsuyama
authors.forename: Shuji
authors.initials: S
authors.lastname: Tani
authors.forename: Hayato
authors.initials: H
authors.lastname: Suzuki
authors.forename: Naoki
authors.initials: N
authors.lastname: Kato
authors.forename: Richard B
authors.initials: RB
authors.lastname: Todd
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Hynes
authors.forename: Norihiro
authors.initials: N
authors.lastname: Tsukagoshi
authors.forename: Masashi
authors.initials: M
authors.lastname: Kato
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Kobayashi
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D001233:Aspergillus nidulans / Q000166:cytology* / Q000235:genetics* / Q000378:metabolism; D002467:Cell Nucleus / Q000378:metabolism*; D003545:Cysteine / Q000378:metabolism; D004271:DNA, Fungal / Q000378:metabolism; D005656:Fungal Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D017353:Gene Deletion; D005800:Genes, Fungal; D042541:Intracellular Space / Q000378:metabolism; D007534:Isomaltose / Q000378:metabolism; D008969:Molecular Sequence Data; D017434:Protein Structure, Tertiary; D011993:Recombinant Fusion Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D015534:Trans-Activators / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D015533:Transcriptional Activation; D015032:Zinc / Q000378:metabolism*
chemical_list: D004271:DNA, Fungal; D005656:Fungal Proteins; D011993:Recombinant Fusion Proteins; D015534:Trans-Activators; C414005:amyR protein, Aspergillus; D007534:Isomaltose; D015032:Zinc; D003545:Cysteine