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- EMDB-8595: CryoEM Structure Refinement by Integrating NMR Chemical Shifts wi... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-8595 | |||||||||||||||||||||
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Title | CryoEM Structure Refinement by Integrating NMR Chemical Shifts with Molecular Dynamics Simulations | |||||||||||||||||||||
![]() | HIV-1 CA hexamer | |||||||||||||||||||||
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Function / homology | ![]() viral budding via host ESCRT complex / ISG15 antiviral mechanism / host multivesicular body / viral nucleocapsid / host cell nucleus / host cell plasma membrane / structural molecule activity / virion membrane / RNA binding / zinc ion binding / membrane Similarity search - Function | |||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||
Method | helical reconstruction / cryo EM / Resolution: 5.0 Å | |||||||||||||||||||||
![]() | Zhao G / Zhang P | |||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: CryoEM Structure Refinement by Integrating NMR Chemical Shifts with Molecular Dynamics Simulations. Authors: Juan R Perilla / Gongpu Zhao / Manman Lu / Jiying Ning / Guangjin Hou / In-Ja L Byeon / Angela M Gronenborn / Tatyana Polenova / Peijun Zhang / ![]() ![]() Abstract: Single particle cryoEM has emerged as a powerful method for structure determination of proteins and complexes, complementing X-ray crystallography and NMR spectroscopy. Yet, for many systems, the ...Single particle cryoEM has emerged as a powerful method for structure determination of proteins and complexes, complementing X-ray crystallography and NMR spectroscopy. Yet, for many systems, the resolution of cryoEM density map has been limited to 4-6 Å, which only allows for resolving bulky amino acids side chains, thus hindering accurate model building from the density map. On the other hand, experimental chemical shifts (CS) from solution and solid state MAS NMR spectra provide atomic level data for each amino acid within a molecule or a complex; however, structure determination of large complexes and assemblies based on NMR data alone remains challenging. Here, we present a novel integrated strategy to combine the highly complementary experimental data from cryoEM and NMR computationally by molecular dynamics simulations to derive an atomistic model, which is not attainable by either approach alone. We use the HIV-1 capsid protein (CA) C-terminal domain as well as the large capsid assembly to demonstrate the feasibility of this approach, termed NMR CS-biased cryoEM structure refinement. | |||||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 338.4 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 15.5 KB 15.5 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 16 KB | Display | ![]() |
Images | ![]() | 141.6 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 5upwMC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | HIV-1 CA hexamer | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.22 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : HIV-1 Capsid Protein Assembly
Entire | Name: HIV-1 Capsid Protein Assembly |
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Components |
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-Supramolecule #1: HIV-1 Capsid Protein Assembly
Supramolecule | Name: HIV-1 Capsid Protein Assembly / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
Recombinant expression | Organism: ![]() ![]() |
Molecular weight | Theoretical: 24 kDa/nm |
-Macromolecule #1: Gag polyprotein
Macromolecule | Name: Gag polyprotein / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 24.654268 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: PIVQNLQGQM VHQAISPRTL NAWVKVVEEK AFSPEVIPMF SALSEGATPQ DLNTMLNTVG GHQAAMQMLK ETINEEAAEW DRLHPVHAG PIAPGQMREP RGSDIAGTTS TLQEQIGWMT HNPPIPVGEI YKRWIILGLN KIVRMYSPTS ILDIRQGPKE P FRDYVDRF ...String: PIVQNLQGQM VHQAISPRTL NAWVKVVEEK AFSPEVIPMF SALSEGATPQ DLNTMLNTVG GHQAAMQMLK ETINEEAAEW DRLHPVHAG PIAPGQMREP RGSDIAGTTS TLQEQIGWMT HNPPIPVGEI YKRWIILGLN KIVRMYSPTS ILDIRQGPKE P FRDYVDRF YKTLRAEQAS QEVKNWMTET LLVQNANPDC KTILKALGPG ATLEEMMTAC QGV |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | helical reconstruction |
Aggregation state | helical array |
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Sample preparation
Concentration | 2 mg/mL | |||||||||
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Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY / Support film - Film thickness: 10.0 nm / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR | |||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: HOMEMADE PLUNGER Details: The assembled sample (1.5 microliter) was applied to the carbon side of a glow discharged perforated Quantifoil grid, followed by application of 3 microliter of low salt buffer (100 ...Details: The assembled sample (1.5 microliter) was applied to the carbon side of a glow discharged perforated Quantifoil grid, followed by application of 3 microliter of low salt buffer (100 milimolar NaCl, 50 milimolar Tris pH 8.0) on the back side of the grid, and blotting, from the back side, with a filter paper, before plunge-freezing in liquid ethane. |
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Electron microscopy
Microscope | FEI POLARA 300 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Number real images: 523 / Average exposure time: 6.0 sec. / Average electron dose: 41.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.2 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.7000000000000001 µm / Nominal magnification: 31000 |
Sample stage | Specimen holder model: SIDE ENTRY, EUCENTRIC / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |