+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 3hbx | ||||||
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タイトル | Crystal structure of GAD1 from Arabidopsis thaliana | ||||||
要素 | Glutamate decarboxylase 1 | ||||||
キーワード | LYASE / Calmodulin-binding / Decarboxylase / Pyridoxal phosphate | ||||||
機能・相同性 | 機能・相同性情報 glutamate decarboxylase / glutamate decarboxylase activity / glutamate metabolic process / pyridoxal phosphate binding / molecular adaptor activity / calmodulin binding 類似検索 - 分子機能 | ||||||
生物種 | Arabidopsis thaliana (シロイヌナズナ) | ||||||
手法 | X線回折 / シンクロトロン / 分子置換 / 解像度: 2.672 Å | ||||||
データ登録者 | Gut, H. / Dominici, P. / Pilati, S. / Gruetter, M.G. / Capitani, G. | ||||||
引用 | ジャーナル: J Mol Biol / 年: 2009 タイトル: A common structural basis for pH- and calmodulin-mediated regulation in plant glutamate decarboxylase. 著者: Heinz Gut / Paola Dominici / Stefania Pilati / Alessandra Astegno / Maxim V Petoukhov / Dmitri I Svergun / Markus G Grütter / Guido Capitani / 要旨: Glutamate decarboxylase (Gad) catalyzes glutamate to gamma-aminobutyrate conversion. Plant Gad is a approximately 340 kDa hexamer, involved in development and stress response, and regulated by pH and ...Glutamate decarboxylase (Gad) catalyzes glutamate to gamma-aminobutyrate conversion. Plant Gad is a approximately 340 kDa hexamer, involved in development and stress response, and regulated by pH and binding of Ca(2+)/calmodulin (CaM) to the C-terminal domain. We determined the crystal structure of Arabidopsis thaliana Gad1 in its CaM-free state, obtained a low-resolution structure of the calmodulin-activated Gad complex by small-angle X-ray scattering and identified the crucial residues, in the C-terminal domain, for regulation by pH and CaM binding. CaM activates Gad1 in a unique way by relieving two C-terminal autoinhibition domains of adjacent active sites, forming a 393 kDa Gad1-CaM complex with an unusual 1:3 stoichiometry. The complex is loosely packed: thanks to the flexible linkers connecting the enzyme core with the six C-terminal regulatory domains, the CaM molecules retain considerable positional and orientational freedom with respect to Gad1. The complex thus represents a prototype for a novel CaM-target interaction mode. Thanks to its two levels of regulation, both targeting the C-terminal domain, Gad can respond flexibly to different kinds of cellular stress occurring at different pH values. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 3hbx.cif.gz | 527.3 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb3hbx.ent.gz | 432.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 3hbx.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 3hbx_validation.pdf.gz | 497.2 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 3hbx_full_validation.pdf.gz | 540.7 KB | 表示 | |
XML形式データ | 3hbx_validation.xml.gz | 94.4 KB | 表示 | |
CIF形式データ | 3hbx_validation.cif.gz | 123.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/hb/3hbx ftp://data.pdbj.org/pub/pdb/validation_reports/hb/3hbx | HTTPS FTP |
-関連構造データ
-リンク
-集合体
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非結晶学的対称性 (NCS) | NCSドメイン:
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