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基本情報
登録情報 | データベース: PDB / ID: 2eu1 | ||||||
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タイトル | Crystal structure of the chaperonin GroEL-E461K | ||||||
![]() | GROEL | ||||||
![]() | CHAPERONE/PEPTIDE BINDING PROTEIN / chaperonin / GROEL / HSP60 / E461K / CHAPERONE-PEPTIDE BINDING PROTEIN COMPLEX | ||||||
機能・相同性 | ![]() GroEL-GroES complex / chaperonin ATPase / virion assembly / : / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding / response to heat ...GroEL-GroES complex / chaperonin ATPase / virion assembly / : / isomerase activity / ATP-dependent protein folding chaperone / response to radiation / unfolded protein binding / protein folding / response to heat / protein refolding / magnesium ion binding / ATP hydrolysis activity / ATP binding / identical protein binding / membrane / cytosol 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
手法 | ![]() ![]() ![]() | ||||||
![]() | Cabo-Bilbao, A. / Spinelli, S. / Sot, B. / Agirre, J. / Mechaly, A.E. / Muga, A. / Guerin, D.M.A. | ||||||
![]() | ![]() タイトル: Crystal structure of the temperature-sensitive and allosteric-defective chaperonin GroEL(E461K). 著者: Cabo-Bilbao, A. / Spinelli, S. / Sot, B. / Agirre, J. / Mechaly, A.E. / Muga, A. / Guerin, D.M.A. #1: ![]() タイトル: Crystal structure of wild-type chaperonin GROEL 著者: Bartolucci, C. / Lamba, D. / Grazulis, S. / Manakova, E. / Heumann, H. #2: ![]() タイトル: A mutant chaperonin with rearranged inter-ring electrostatic contacts and temperature-sensitive dissociation. 著者: B Trevor Sewell / Robert B Best / Shaoxia Chen / Alan M Roseman / George W Farr / Arthur L Horwich / Helen R Saibil / ![]() 要旨: The chaperonin GroEL assists protein folding through ATP-dependent, cooperative movements that alternately create folding chambers in its two rings. The substitution E461K at the interface between ...The chaperonin GroEL assists protein folding through ATP-dependent, cooperative movements that alternately create folding chambers in its two rings. The substitution E461K at the interface between these two rings causes temperature-sensitive, defective protein folding in Escherichia coli. To understand the molecular defect, we have examined the mutant chaperonin by cryo-EM. The normal out-of-register alignment of contacts between subunits of opposing wild-type rings is changed in E461K to an in-register one. This is associated with loss of cooperativity in ATP binding and hydrolysis. Consistent with the loss of negative cooperativity between rings, the cochaperonin GroES binds simultaneously to both E461K rings. These GroES-bound structures were unstable at higher temperature, dissociating into complexes of single E461K rings associated with GroES. Lacking the allosteric signal from the opposite ring, these complexes cannot release their GroES and become trapped, dead-end states. #3: ![]() タイトル: Conformational variability in the refined structure of the chaperonin GroEL at 2.8 A resolution 著者: Braig, K. / Adams, P.D. / Brunger, A.T. #4: ![]() タイトル: The crystal structure of the asymmetric GroEL-GroES-(ADP)7 chaperonin complex. 著者: Z Xu / A L Horwich / P B Sigler / ![]() 要旨: Chaperonins assist protein folding with the consumption of ATP. They exist as multi-subunit protein assemblies comprising rings of subunits stacked back to back. In Escherichia coli, asymmetric ...Chaperonins assist protein folding with the consumption of ATP. They exist as multi-subunit protein assemblies comprising rings of subunits stacked back to back. In Escherichia coli, asymmetric intermediates of GroEL are formed with the co-chaperonin GroES and nucleotides bound only to one of the seven-subunit rings (the cis ring) and not to the opposing ring (the trans ring). The structure of the GroEL-GroES-(ADP)7 complex reveals how large en bloc movements of the cis ring's intermediate and apical domains enable bound GroES to stabilize a folding chamber with ADP confined to the cis ring. Elevation and twist of the apical domains double the volume of the central cavity and bury hydrophobic peptide-binding residues in the interface with GroES, as well as between GroEL subunits, leaving a hydrophilic cavity lining that is conducive to protein folding. An inward tilt of the cis equatorial domain causes an outward tilt in the trans ring that opposes the binding of a second GroES. When combined with new functional results, this negative allosteric mechanism suggests a model for an ATP-driven folding cycle that requires a double toroid. #5: ジャーナル: Protein Sci. / 年: 2005 タイトル: Ionic interactions at both inter-ring contact sites of GroEL are involved in transmission of the allosteric signal: a time-resolved infrared difference study 著者: Sot, B. / von Germar, F. / Mantele, W. / Valpuesta, J.M. / Taneva, S.G. / Muga, A. #6: ジャーナル: J.Biol.Chem. / 年: 2002 タイトル: Salt bridges at the inter-ring interface regulate the thermostat of GroEL 著者: Sot, B. / Galan, A. / Valpuesta, J.M. / Bertrand, S. / Muga, A. #7: ジャーナル: J.Biol.Chem. / 年: 2003 タイトル: GroEL stability and function. Contribution of the ionic interactions at the inter-ring contact sites 著者: Sot, B. / Banuelos, S. / Valpuesta, J.M. / Muga, A. | ||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 1.2 MB | 表示 | ![]() |
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PDB形式 | ![]() | 1 MB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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リンク
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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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詳細 | The biological GroELE461K molecule is formed in the crystal by the association of two rings from neighbouring asymmetric units. |
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要素
#1: タンパク質 | 分子量: 57391.773 Da / 分子数: 14 / 変異: E461K / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() ![]() |
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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: 3.11 Å3/Da / 溶媒含有率: 60.41 % |
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結晶化 | 温度: 277 K / pH: 8 詳細: Reservoir solution: 43% (v/v) MPD, 100mM Imidazole, 170mM MgCl2.6H2O, dissolved in the ratio 1:1.5 with 22.5mg/ml protein, 50mM TRIS-HCL, 10mM MgCl2, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 277K |
-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: ![]() ![]() ![]() |
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: 0.97563 Å / 相対比: 1 |
反射 | 解像度: 3.29→39.75 Å / Num. obs: 123350 / % possible obs: 85 % |
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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 1OEL 解像度: 3.29→15 Å / σ(F): 0 / 立体化学のターゲット値: ENGH & HUBER / 詳細: MAXIMUM LIKELIHOOD TARGET USING AMPLITUDES
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精密化ステップ | サイクル: LAST / 解像度: 3.29→15 Å
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拘束条件 |
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Xplor file | Serial no: 1 / Param file: PROTEIN_REP.PARAM |