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基本情報
登録情報 | データベース: PDB / ID: 2bfb | |||||||||
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タイトル | Reactivity modulation of human branched-chain alpha-ketoacid dehydrogenase by an internal molecular switch | |||||||||
![]() | (2-OXOISOVALERATE DEHYDROGENASE ...) x 2 | |||||||||
![]() | OXIDOREDUCTASE / MULTI-ENZYME COMPLEX / ACYLATION / OXIDATIVE DECARBOXYLATION / MAPLE SYRUP URINE DISEASE / THIAMINE DIPHOSPHATE / PHOSPHORYLATION | |||||||||
機能・相同性 | ![]() Loss-of-function mutations in BCKDHA or BCKDHB cause MSUD / 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring) / branched-chain 2-oxo acid dehydrogenase activity / branched-chain alpha-ketoacid dehydrogenase complex / BCKDH synthesizes BCAA-CoA from KIC, KMVA, KIV / Loss-of-function mutations in DBT cause MSUD2 / Loss-of-function mutations in DLD cause MSUD3/DLDD / H139Hfs13* PPM1K causes a mild variant of MSUD / Branched-chain ketoacid dehydrogenase kinase deficiency / branched-chain amino acid catabolic process ...Loss-of-function mutations in BCKDHA or BCKDHB cause MSUD / 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring) / branched-chain 2-oxo acid dehydrogenase activity / branched-chain alpha-ketoacid dehydrogenase complex / BCKDH synthesizes BCAA-CoA from KIC, KMVA, KIV / Loss-of-function mutations in DBT cause MSUD2 / Loss-of-function mutations in DLD cause MSUD3/DLDD / H139Hfs13* PPM1K causes a mild variant of MSUD / Branched-chain ketoacid dehydrogenase kinase deficiency / branched-chain amino acid catabolic process / Branched-chain amino acid catabolism / carboxy-lyase activity / response to glucocorticoid / response to cAMP / response to nutrient / lipid metabolic process / mitochondrial matrix / protein-containing complex binding / nucleolus / mitochondrion / nucleoplasm / metal ion binding 類似検索 - 分子機能 | |||||||||
生物種 | ![]() | |||||||||
手法 | ![]() ![]() ![]() | |||||||||
![]() | Machius, M. / Wynn, R.M. / Chuang, J.L. / Tomchick, D.R. / Brautigam, C.A. / Chuang, D.T. | |||||||||
![]() | ![]() タイトル: A Versatile Conformational Switch Regulates Reactivity in Human Branched-Chain Alpha-Ketoacid Dehydrogenase. 著者: Machius, M. / Wynn, R.M. / Chuang, J.L. / Tomchick, D.R. / Brautigam, C.A. / Chuang, D.T. #1: ![]() タイトル: Crosstalk between Cofactor Binding and the Phosphorylation Loop Conformation in the Bckd Machine 著者: Li, J. / Wynn, R.M. / Machius, M. / Chuang, J.L. / Karthikeyan, S. / Tomchick, D.R. / Chuang, D.T. #2: ![]() タイトル: Roles of His291-Alpha and His146-Beta in the Reductive Acylation Reaction Catalyzed by Human Branched-Chain Alpha-Ketoacid Dehydrogenase: Refined Phosphorylation Loop Structure in the Active Site 著者: Wynn, R. / Machius, M. / Chuang, J. / Li, J. / Tomchick, D. / Chuang, D. #3: ジャーナル: J.Biol.Chem. / 年: 2001 タイトル: Roles of Active Site and Novel K+ Ion-Binding Site Residues in Human Mitochondrial Branched-Chain Alpha-Ketoacid Decarboxylase/Dehydrogenase 著者: Wynn, R.M. / Ho, R. / Chuang, J.L. / Chuang, D.T. | |||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 177.8 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 819.4 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 825.9 KB | 表示 | |
XML形式データ | ![]() | 34 KB | 表示 | |
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-関連構造データ
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集合体
登録構造単位 | ![]()
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単位格子 |
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Components on special symmetry positions |
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要素
-2-OXOISOVALERATE DEHYDROGENASE ... , 2種, 2分子 AB
#1: タンパク質 | 分子量: 45430.980 Da / 分子数: 1 / 断片: RESIDUES 46-445 / 変異: YES / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 株 (発現宿主): BL-21 CELLS WITH OVEREXPRESSING GROEL AND GROES 参照: UniProt: P12694, 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring) |
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#2: タンパク質 | 分子量: 37902.270 Da / 分子数: 1 / 断片: RESIDUES 51-392 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() 株 (発現宿主): BL-21 CELLS WITH OVEREXPRESSING GROEL AND GROES 参照: UniProt: P21953, 3-methyl-2-oxobutanoate dehydrogenase (2-methylpropanoyl-transferring) |
-非ポリマー , 7種, 652分子 












#3: 化合物 | #4: 化合物 | ChemComp-MN / | #5: 化合物 | #6: 化合物 | ChemComp-TPP / | #7: 化合物 | ChemComp-GOL / | #8: 化合物 | ChemComp-MRD / ( | #9: 水 | ChemComp-HOH / | |
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-詳細
構成要素の詳細 | ENGINEERED |
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-実験情報
-実験
実験 | 手法: ![]() |
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試料調製
結晶 | マシュー密度: 2.5 Å3/Da / 溶媒含有率: 53.4 % |
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結晶化 | 温度: 295 K / 手法: 蒸気拡散法 / pH: 5.5 詳細: CRYSTALS WERE GROWN AT 22C VIA THE VAPOR DIFFUSION METHOD IN COMPLEX WITH A 40 AMINO ACID PEPTIDE DERIVED FROM THE SUBUNIT BINDING DOMAIN (SBD) OF THE E2 COMPONENT OF BRANCHED CHAIN ALPHA- ...詳細: CRYSTALS WERE GROWN AT 22C VIA THE VAPOR DIFFUSION METHOD IN COMPLEX WITH A 40 AMINO ACID PEPTIDE DERIVED FROM THE SUBUNIT BINDING DOMAIN (SBD) OF THE E2 COMPONENT OF BRANCHED CHAIN ALPHA-KETOACID DEHDROGENASE. THIS COMPLEX WAS FORMED BY MIXING N-TERMINALLY HIS6-TAGGED PROTEIN WITH C-TERMINALLY HIS6-TAGGED SBD IN 50 MM NA-HEPES, PH 7.5, 150 MM KCL, 20 MM DTT AND 5% (V/V) GLYCEROL AT A MOLAR RATIO OF 1:4. CRYSTALS OF THE COMPLEX (20 MG/ML) WERE OBTAINED BY MIXING 3 MICROLITERS OF PROTEIN WITH 3 MICROLITERS OF CRYSTALLIZATION SOLUTION (10% (V/V) POLYETHYLENE GLYCOL 4000, 10% (V/V) MPD AND 0.1M SODIUM CITRATE, PH 5.8) WITH 1 ML OF CRYSTALLIZATION SOLUTION IN THE RESERVOIR. MANGANESE IONS WERE USED INSTEAD OF MAGNESIUM REQUIRED FOR THE BINDING OF THIAMIN DIPHOSPHATE TO THE ENZYME. THE PRESENCE OF MANGANESE IONS IN THE CRYSTALS RESULTED IN IMPROVED X-RAY DIFFRACTION QUALITIES WITHOUT AFFECTING THE CATALYTIC PROPERTIES. CRYSTALS WERE CRYO-PROTECTED BY STEP-WISE TRANSFER INTO CRYO-BUFFER (CRYSTALLIZATION SOLUTION CONTAINING 5-10%(V/V) GLYCEROL). |
-データ収集
回折 | 平均測定温度: 100 K |
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放射光源 | 由来: ![]() ![]() ![]() |
検出器 | タイプ: CUSTOM / 検出器: CCD / 日付: 2004年4月12日 |
放射 | プロトコル: SINGLE WAVELENGTH / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray |
放射波長 | 波長: 1.00691 Å / 相対比: 1 |
反射 | 解像度: 1.77→26.77 Å / Num. obs: 82758 / % possible obs: 99.7 % / Observed criterion σ(I): -3 / 冗長度: 6.5 % / Biso Wilson estimate: 18.88 Å2 / Rmerge(I) obs: 0.09 / Net I/σ(I): 19.4 |
反射 シェル | 解像度: 1.77→1.8 Å / 冗長度: 4.4 % / Rmerge(I) obs: 0.74 / Mean I/σ(I) obs: 2 / % possible all: 99.9 |
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解析
ソフトウェア |
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精密化 | 構造決定の手法: ![]() 開始モデル: PDB ENTRY 1OLS 解像度: 1.77→30 Å / Cor.coef. Fo:Fc: 0.971 / Cor.coef. Fo:Fc free: 0.953 / SU B: 3.543 / SU ML: 0.06 / TLS residual ADP flag: LIKELY RESIDUAL / 交差検証法: THROUGHOUT / ESU R: 0.088 / ESU R Free: 0.093 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. DISORDERED REGIONS WERE MODELED STEREOCHEMICALLY. THE SUBUNIT BINDING DOMAIN (SBD) USED IN THE CRYSTALLIZATION PROCEDURE WAS NOT INCLUDED IN ...詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. DISORDERED REGIONS WERE MODELED STEREOCHEMICALLY. THE SUBUNIT BINDING DOMAIN (SBD) USED IN THE CRYSTALLIZATION PROCEDURE WAS NOT INCLUDED IN THE MODEL, ALTHOUGH ELECTRON DENSITY FOR IT WAS PRESENT. THE SBD BINDS NEAR A CRYSTALLOGRAPHIC TWO-FOLD AXIS, LEADING TO OVERLAPPED AND AVERAGED ELECTRON DENSITY. THE QUALITY OF THE ELECTRON DENSITY DID NOT ALLOW UNAMBIGUOUS TRACING OF THIS PEPTIDE.
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溶媒の処理 | イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 17.05 Å2
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精密化ステップ | サイクル: LAST / 解像度: 1.77→30 Å
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拘束条件 |
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