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Open data
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Basic information
Entry | Database: PDB / ID: 6wqk | |||||||||
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Title | hnRNPA2 Low complexity domain (LCD) determined by cryoEM | |||||||||
![]() | MCherry fluorescent protein,Heterogeneous nuclear ribonucleoproteins A2/B1 chimera | |||||||||
![]() | PROTEIN FIBRIL / Ribinucleoprotein / RNA binding protein / Low complexity domain | |||||||||
Function / homology | ![]() : / miRNA transport / positive regulation of telomere maintenance via telomere lengthening / RNA transport / G-quadruplex DNA unwinding / primary miRNA processing / single-stranded telomeric DNA binding / N6-methyladenosine-containing RNA reader activity / G-rich strand telomeric DNA binding / miRNA binding ...: / miRNA transport / positive regulation of telomere maintenance via telomere lengthening / RNA transport / G-quadruplex DNA unwinding / primary miRNA processing / single-stranded telomeric DNA binding / N6-methyladenosine-containing RNA reader activity / G-rich strand telomeric DNA binding / miRNA binding / negative regulation of mRNA splicing, via spliceosome / Processing of Capped Intron-Containing Pre-mRNA / mRNA transport / mRNA export from nucleus / Cajal body / pre-mRNA intronic binding / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / catalytic step 2 spliceosome / bioluminescence / mRNA Splicing - Major Pathway / molecular condensate scaffold activity / generation of precursor metabolites and energy / mRNA 3'-UTR binding / spliceosomal complex / nuclear matrix / mRNA splicing, via spliceosome / mRNA processing / chromosome, telomeric region / ribonucleoprotein complex / negative regulation of transcription by RNA polymerase II / RNA binding / extracellular exosome / nucleoplasm / identical protein binding / membrane / nucleus / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.1 Å | |||||||||
![]() | Lu, J. / Cao, Q. / Hughes, M.P. / Sawaya, M.R. / Boyer, D.R. / Cascio, D. / Eisenberg, D.S. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: CryoEM structure of the low-complexity domain of hnRNPA2 and its conversion to pathogenic amyloid. Authors: Jiahui Lu / Qin Cao / Michael P Hughes / Michael R Sawaya / David R Boyer / Duilio Cascio / David S Eisenberg / ![]() Abstract: hnRNPA2 is a human ribonucleoprotein (RNP) involved in RNA metabolism. It forms fibrils both under cellular stress and in mutated form in neurodegenerative conditions. Previous work established that ...hnRNPA2 is a human ribonucleoprotein (RNP) involved in RNA metabolism. It forms fibrils both under cellular stress and in mutated form in neurodegenerative conditions. Previous work established that the C-terminal low-complexity domain (LCD) of hnRNPA2 fibrillizes under stress, and missense mutations in this domain are found in the disease multisystem proteinopathy (MSP). However, little is known at the atomic level about the hnRNPA2 LCD structure that is involved in those processes and how disease mutations cause structural change. Here we present the cryo-electron microscopy (cryoEM) structure of the hnRNPA2 LCD fibril core and demonstrate its capability to form a reversible hydrogel in vitro containing amyloid-like fibrils. Whereas these fibrils, like pathogenic amyloid, are formed from protein chains stacked into β-sheets by backbone hydrogen bonds, they display distinct structural differences: the chains are kinked, enabling non-covalent cross-linking of fibrils and disfavoring formation of pathogenic steric zippers. Both reversibility and energetic calculations suggest these fibrils are less stable than pathogenic amyloid. Moreover, the crystal structure of the disease-mutation-containing segment (D290V) of hnRNPA2 suggests that the replacement fundamentally alters the fibril structure to a more stable energetic state. These findings illuminate how molecular interactions promote protein fibril networks and how mutation can transform fibril structure from functional to a pathogenic form. | |||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 84.1 KB | Display | ![]() |
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PDB format | ![]() | 47.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 21871MC ![]() 6wpqC C: citing same article ( M: map data used to model this data |
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Similar structure data | |
EM raw data | ![]() Data size: 1.2 TB Data #1: Unaligned micrographs, 1.15e-/A^2/frame [micrographs - multiframe]) |
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Links
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Assembly
Deposited unit | ![]()
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Symmetry | Helical symmetry: (Circular symmetry: 1 / Dyad axis: no / N subunits divisor: 1 / Num. of operations: 5 / Rise per n subunits: 4.81 Å / Rotation per n subunits: -2.88 °) |
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Components
#1: Protein | Mass: 45666.625 Da / Num. of mol.: 5 / Fragment: low complexity domain (UNP residues 193-353) Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: mCherry, HNRNPA2B1, HNRPA2B1 / Production host: ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: FILAMENT / 3D reconstruction method: helical reconstruction |
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Sample preparation
Component | Name: heterogeneous nuclear ribonucleo-protein A2 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 1.15 e/Å2 / Film or detector model: GATAN K2 IS (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: dev_3724: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Helical symmerty | Angular rotation/subunit: -2.88 ° / Axial rise/subunit: 4.81 Å / Axial symmetry: C1 | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 132571 / Symmetry type: HELICAL | ||||||||||||||||||||||||
Refine LS restraints |
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