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TitleStructure of the toxic core of α-synuclein from invisible crystals.
Journal, issue, pagesNature, Vol. 525, Issue 7570, Page 486-490, Year 2015
Publish dateSep 24, 2015
AuthorsJose 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 /
PubMed AbstractThe 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.
External linksNature / PubMed:26352473 / PubMed Central
MethodsEM (electron crystallography) / X-ray diffraction
Resolution1.4 - 1.854 Å
Structure data

3001

4znn

EMDB-3001: MicroED structure of the segment, GVVHGVTTVA, from the A53T familial mutant of Parkinson's disease protein, alpha-synuclein, residues 47-56
PDB-4znn: MicroED structure of the segment, GVVHGVTTVA, from the A53T familial mutant of Parkinson's disease protein, alpha-synuclein residues 47-56
Method: EM (electron crystallography) / Resolution: 1.4 Å

3028

4ril

EMDB-3028: MicroED structure of the toxic core segment, GAVVTGVTAVA, from Parkinson's disease protein, alpha-synuclein, residues 69-78.
PDB-4ril: Structure of the amyloid forming segment, GAVVTGVTAVA, from the NAC domain of Parkinson's disease protein alpha-synuclein, residues 68-78, determined by electron diffraction
Method: EM (electron crystallography) / Resolution: 1.4 Å

PDB-4rik:
Amyloid forming segment, AVVTGVTAV, from the NAC domain of Parkinson's disease protein alpha-synuclein, residues 69-77
Method: X-RAY DIFFRACTION / Resolution: 1.854 Å

Chemicals

ChemComp-HOH:
WATER / Water

Source
  • homo sapiens (human)
KeywordsLIPID BINDING PROTEIN / Amyloid / alpha-synuclein / Parkinson's Disease / Toxic Core / NAC / NACore

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