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- PDB-6slu: Structure of the native full-length HIV-1 capsid protein A92E in ... -

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Basic information

Entry
Database: PDB / ID: 6slu
TitleStructure of the native full-length HIV-1 capsid protein A92E in helical assembly (-13,11)
ComponentsGag protein
KeywordsVIRAL PROTEIN / HIV / capsid / hexamer / helical assembly / curvature
Function / homology
Function and homology information


integrase activity / Integration of viral DNA into host genomic DNA / Autointegration results in viral DNA circles / Minus-strand DNA synthesis / Plus-strand DNA synthesis / 2-LTR circle formation / Uncoating of the HIV Virion / Early Phase of HIV Life Cycle / Vpr-mediated nuclear import of PICs / Integration of provirus ...integrase activity / Integration of viral DNA into host genomic DNA / Autointegration results in viral DNA circles / Minus-strand DNA synthesis / Plus-strand DNA synthesis / 2-LTR circle formation / Uncoating of the HIV Virion / Early Phase of HIV Life Cycle / Vpr-mediated nuclear import of PICs / Integration of provirus / APOBEC3G mediated resistance to HIV-1 infection / Binding and entry of HIV virion / viral process / viral life cycle / HIV-1 retropepsin / symbiont-mediated activation of host apoptosis / Assembly Of The HIV Virion / retroviral ribonuclease H / exoribonuclease H / exoribonuclease H activity / Budding and maturation of HIV virion / host multivesicular body / protein processing / viral genome integration into host DNA / RNA-directed DNA polymerase / establishment of integrated proviral latency / symbiont-mediated suppression of host gene expression / viral penetration into host nucleus / RNA stem-loop binding / RNA-directed DNA polymerase activity / RNA-DNA hybrid ribonuclease activity / Transferases; Transferring phosphorus-containing groups; Nucleotidyltransferases / host cell / viral capsid / peptidase activity / viral nucleocapsid / DNA recombination / DNA-directed DNA polymerase / Hydrolases; Acting on ester bonds / aspartic-type endopeptidase activity / DNA-directed DNA polymerase activity / symbiont entry into host cell / viral translational frameshifting / lipid binding / host cell nucleus / host cell plasma membrane / structural molecule activity / virion membrane / DNA binding / zinc ion binding / identical protein binding / membrane
Similarity search - Function
: / gag protein p24 N-terminal domain / Reverse transcriptase connection / Reverse transcriptase connection domain / Reverse transcriptase thumb / Reverse transcriptase thumb domain / Integrase Zinc binding domain / Zinc finger integrase-type profile. / Integrase-like, N-terminal / Integrase DNA binding domain ...: / gag protein p24 N-terminal domain / Reverse transcriptase connection / Reverse transcriptase connection domain / Reverse transcriptase thumb / Reverse transcriptase thumb domain / Integrase Zinc binding domain / Zinc finger integrase-type profile. / Integrase-like, N-terminal / Integrase DNA binding domain / Integrase, C-terminal domain superfamily, retroviral / Integrase, N-terminal zinc-binding domain / Integrase, C-terminal, retroviral / Integrase DNA binding domain profile. / Immunodeficiency lentiviral matrix, N-terminal / gag gene protein p17 (matrix protein) / RNase H / Integrase core domain / Integrase, catalytic core / Integrase catalytic domain profile. / Retropepsin-like catalytic domain / RNase H type-1 domain profile. / Ribonuclease H domain / Matrix protein, lentiviral and alpha-retroviral, N-terminal / Retroviral nucleocapsid Gag protein p24, C-terminal domain / Gag protein p24 C-terminal domain / Reverse transcriptase domain / Reverse transcriptase (RT) catalytic domain profile. / Retropepsins / Retroviral aspartyl protease / Aspartyl protease, retroviral-type family profile. / Peptidase A2A, retrovirus, catalytic / Reverse transcriptase (RNA-dependent DNA polymerase) / Retroviral matrix protein / Retrovirus capsid, C-terminal / Retrovirus capsid, N-terminal / zinc finger / Zinc knuckle / Zinc finger, CCHC-type superfamily / Zinc finger, CCHC-type / Zinc finger CCHC-type profile. / Aspartic peptidase, active site / Eukaryotic and viral aspartyl proteases active site. / Ribonuclease H superfamily / Aspartic peptidase domain superfamily / Ribonuclease H-like superfamily / Reverse transcriptase/Diguanylate cyclase domain / DNA/RNA polymerase superfamily
Similarity search - Domain/homology
Gag-Pol polyprotein / Gag protein
Similarity search - Component
Biological speciesHuman immunodeficiency virus 1
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 4.7 Å
AuthorsNi, T. / Gerard, S. / Zhao, G. / Ning, J. / Zhang, P.
Funding support United Kingdom, United States, 2items
OrganizationGrant numberCountry
Wellcome Trust206422/Z/17/Z United Kingdom
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)P50AI150481 United States
CitationJournal: Nat Struct Mol Biol / Year: 2020
Title: Intrinsic curvature of the HIV-1 CA hexamer underlies capsid topology and interaction with cyclophilin A.
Authors: Tao Ni / Samuel Gerard / Gongpu Zhao / Kyle Dent / Jiying Ning / Jing Zhou / Jiong Shi / Jordan Anderson-Daniels / Wen Li / Sooin Jang / Alan N Engelman / Christopher Aiken / Peijun Zhang /
Abstract: The mature retrovirus capsid consists of a variably curved lattice of capsid protein (CA) hexamers and pentamers. High-resolution structures of the curved assembly, or in complex with host factors, ...The mature retrovirus capsid consists of a variably curved lattice of capsid protein (CA) hexamers and pentamers. High-resolution structures of the curved assembly, or in complex with host factors, have not been available. By devising cryo-EM methodologies for exceedingly flexible and pleomorphic assemblies, we have determined cryo-EM structures of apo-CA hexamers and in complex with cyclophilin A (CypA) at near-atomic resolutions. The CA hexamers are intrinsically curved, flexible and asymmetric, revealing the capsomere and not the previously touted dimer or trimer interfaces as the key contributor to capsid curvature. CypA recognizes specific geometries of the curved lattice, simultaneously interacting with three CA protomers from adjacent hexamers via two noncanonical interfaces, thus stabilizing the capsid. By determining multiple structures from various helical symmetries, we further revealed the essential plasticity of the CA molecule, which allows formation of continuously curved conical capsids and the mechanism of capsid pattern sensing by CypA.
History
DepositionAug 20, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 9, 2020Provider: repository / Type: Initial release
Revision 1.1Feb 10, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Mar 30, 2022Group: Author supporting evidence / Database references / Category: database_2 / pdbx_audit_support
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_audit_support.funding_organization

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Structure visualization

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Assembly

Deposited unit
A: Gag protein
B: Gag protein
C: Gag protein
D: Gag protein
E: Gag protein
F: Gag protein


Theoretical massNumber of molelcules
Total (without water)153,9876
Polymers153,9876
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area12890 Å2
ΔGint-84 kcal/mol
Surface area71670 Å2
MethodPISA

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Components

#1: Protein
Gag protein


Mass: 25664.420 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: gag / Production host: Escherichia coli (E. coli) / References: UniProt: Q71B32, UniProt: P04585*PLUS

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: HELICAL ARRAY / 3D reconstruction method: helical reconstruction

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Sample preparation

ComponentName: In vitro assembled HIV-1 capsid in tubular assembly / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Human immunodeficiency virus 1
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: Purified capsid protein self-assembled in 50 mM Tris-HCl pH8.0 1M NaCl
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company
MicroscopyModel: FEI POLARA 300
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2 mm / C2 aperture diameter: 100 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: OTHER
Image recordingElectron dose: 40 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 6797

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Processing

SoftwareName: PHENIX / Version: dev_3488: / Classification: refinement
EM software
IDNameVersionCategory
1RELION2.0;3.0particle selection
4RELION2.0; 3.0CTF correction
7Cootmodel fitting
9RELION2.0; 3.0initial Euler assignment
10RELION2.0; 3.0final Euler assignment
11RELION2.0;3.0classification
12RELION2.0; 3.03D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: 165.3 ° / Axial rise/subunit: 6.6 Å / Axial symmetry: C2
3D reconstructionResolution: 4.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 88436 / Algorithm: FOURIER SPACE / Symmetry type: HELICAL
Atomic model buildingB value: 72.14 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Cross-correlation coefficient
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00310566
ELECTRON MICROSCOPYf_angle_d0.62814366
ELECTRON MICROSCOPYf_dihedral_angle_d11.0586522
ELECTRON MICROSCOPYf_chiral_restr0.0441604
ELECTRON MICROSCOPYf_plane_restr0.0041882

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