National Institutes of Health/National Institute on Aging (NIH/NIA)
1R01-AG029430
米国
National Institutes of Health/National Institute on Aging (NIH/NIA)
AG016570
米国
引用
ジャーナル: Nature / 年: 2015 タイトル: Structure of the toxic core of α-synuclein from invisible crystals. 著者: Jose A Rodriguez / Magdalena I Ivanova / Michael R Sawaya / Duilio Cascio / Francis E Reyes / Dan Shi / Smriti Sangwan / Elizabeth L Guenther / Lisa M Johnson / Meng Zhang / Lin Jiang / Mark ...著者: Jose A Rodriguez / Magdalena I Ivanova / Michael R Sawaya / Duilio Cascio / Francis E Reyes / Dan Shi / Smriti Sangwan / Elizabeth L Guenther / Lisa M Johnson / Meng Zhang / Lin Jiang / Mark A Arbing / Brent L Nannenga / Johan Hattne / Julian Whitelegge / Aaron S Brewster / Marc Messerschmidt / Sébastien Boutet / Nicholas K Sauter / Tamir Gonen / David S Eisenberg / 要旨: The protein α-synuclein is the main component of Lewy bodies, the neuron-associated aggregates seen in Parkinson disease and other neurodegenerative pathologies. An 11-residue segment, which we term ...The protein α-synuclein is the main component of Lewy bodies, the neuron-associated aggregates seen in Parkinson disease and other neurodegenerative pathologies. An 11-residue segment, which we term NACore, appears to be responsible for amyloid formation and cytotoxicity of human α-synuclein. Here we describe crystals of NACore that have dimensions smaller than the wavelength of visible light and thus are invisible by optical microscopy. As the crystals are thousands of times too small for structure determination by synchrotron X-ray diffraction, we use micro-electron diffraction to determine the structure at atomic resolution. The 1.4 Å resolution structure demonstrates that this method can determine previously unknown protein structures and here yields, to our knowledge, the highest resolution achieved by any cryo-electron microscopy method to date. The structure exhibits protofibrils built of pairs of face-to-face β-sheets. X-ray fibre diffraction patterns show the similarity of NACore to toxic fibrils of full-length α-synuclein. The NACore structure, together with that of a second segment, inspires a model for most of the ordered portion of the toxic, full-length α-synuclein fibril, presenting opportunities for the design of inhibitors of α-synuclein fibrils.
包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: crystal
結晶化
温度: 310 K / 手法: batch mode / pH: 7 詳細: 1 mg of synthetic peptide GVVHGVTTVA was dissolved in 200 microliters of 50 mM phosphate buffer pH 7.0 and 0.1% w/v DMSO and shaken overnight in an orbital mixing plate PH範囲: 7
構造決定の手法: 分子置換 開始モデル: Ideal model 解像度: 1.41→16.47 Å / Cor.coef. Fo:Fc: 0.953 / Cor.coef. Fo:Fc free: 0.958 / WRfactor Rfree: 0.2879 / WRfactor Rwork: 0.2427 / FOM work R set: 0.6203 / SU B: 3.491 / SU ML: 0.111 / SU R Cruickshank DPI: 0.1115 / SU Rfree: 0.1137 / 交差検証法: THROUGHOUT / σ(F): 0 / ESU R: 0.112 / ESU R Free: 0.114 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES : REFINED INDIVIDUALLY
Rfactor
反射数
%反射
Selection details
Rfree
0.2817
112
10 %
RANDOM
Rwork
0.2347
-
-
-
obs
0.2396
1006
86.73 %
-
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