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- EMDB-13087: Immature HIV-1 matrix structure -

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Basic information

Entry
Database: EMDB / ID: EMD-13087
TitleImmature HIV-1 matrix structure
Map dataImmature HIV-1 MA structure
Sample
  • Virus: Human immunodeficiency virus 1
    • Protein or peptide: Gag polyproteinGroup-specific antigen
  • Ligand: MYRISTIC ACID
Function / homology
Function and homology information


viral process / viral nucleocapsid / host cell cytoplasm / virion membrane / structural molecule activity / RNA binding / zinc ion binding / cytoplasm
Similarity search - Function
gag protein p24 N-terminal domain / Immunodeficiency lentiviral matrix, N-terminal / gag gene protein p17 (matrix protein) / Retroviral nucleocapsid Gag protein p24, C-terminal domain / Gag protein p24 C-terminal domain / Matrix protein, lentiviral and alpha-retroviral, N-terminal / Retrovirus capsid, C-terminal / Retroviral matrix protein / Retrovirus capsid, N-terminal / Zinc knuckle ...gag protein p24 N-terminal domain / Immunodeficiency lentiviral matrix, N-terminal / gag gene protein p17 (matrix protein) / Retroviral nucleocapsid Gag protein p24, C-terminal domain / Gag protein p24 C-terminal domain / Matrix protein, lentiviral and alpha-retroviral, N-terminal / Retrovirus capsid, C-terminal / Retroviral matrix protein / Retrovirus capsid, N-terminal / Zinc knuckle / Zinc finger, CCHC-type superfamily / Zinc finger, CCHC-type / Zinc finger CCHC-type profile.
Similarity search - Domain/homology
Biological speciesHuman immunodeficiency virus 1
Methodsubtomogram averaging / cryo EM / Resolution: 7.2 Å
AuthorsQu K / Ke ZL / Zila V / Anders-Oesswein M / Glass B / Muecksch F / Mueller R / Schultz C / Mueller B / Kraeusslich HG / Briggs JAG
Funding support Germany, 8 items
OrganizationGrant numberCountry
European Research Council (ERC)ERC-CoG-648432 MEMBRANEFUSION Germany
Medical Research Council (MRC, United Kingdom)MC_UP_1201/16 Germany
German Research Foundation (DFG)112927078 - TRR 83 Germany
German Research Foundation (DFG)240245660 - SFB1129 project 5 Germany
German Research Foundation (DFG)MU885-1 Germany
German Research Foundation (DFG)240245660 - SFB1129 project 6 Germany
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM127631 Germany
German Research Foundation (DFG)278001972 - TRR186 project Z1 Germany
CitationJournal: Science / Year: 2021
Title: Maturation of the matrix and viral membrane of HIV-1.
Authors: Kun Qu / Zunlong Ke / Vojtech Zila / Maria Anders-Össwein / Bärbel Glass / Frauke Mücksch / Rainer Müller / Carsten Schultz / Barbara Müller / Hans-Georg Kräusslich / John A G Briggs /
Abstract: Gag, the primary structural protein of HIV-1, is recruited to the plasma membrane for virus assembly by its matrix (MA) domain. Gag is subsequently cleaved into its component domains, causing ...Gag, the primary structural protein of HIV-1, is recruited to the plasma membrane for virus assembly by its matrix (MA) domain. Gag is subsequently cleaved into its component domains, causing structural maturation to repurpose the virion for cell entry. We determined the structure and arrangement of MA within immature and mature HIV-1 through cryo-electron tomography. We found that MA rearranges between two different hexameric lattices upon maturation. In mature HIV-1, a lipid extends out of the membrane to bind with a pocket in MA. Our data suggest that proteolytic maturation of HIV-1 not only assembles the viral capsid surrounding the genome but also repurposes the membrane-bound MA lattice for an entry or postentry function and results in the partial removal of up to 2500 lipids from the viral membrane.
History
DepositionJun 15, 2021-
Header (metadata) releaseAug 18, 2021-
Map releaseAug 18, 2021-
UpdateAug 18, 2021-
Current statusAug 18, 2021Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 2
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 2
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7ovq
  • Surface level: 2
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7ovq
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_13087.png

Downloads & links

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Map

FileDownload / File: emd_13087.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationImmature HIV-1 MA structure
Voxel sizeX=Y=Z: 1.35 Å
Density
Contour LevelBy AUTHOR: 2.0 / Movie #1: 2
Minimum - Maximum-12.04533 - 15.475817
Average (Standard dev.)7.550562e-09 (±0.99999994)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 259.2 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.351.351.35
M x/y/z192192192
origin x/y/z0.0000.0000.000
length x/y/z259.200259.200259.200
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ500500500
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS192192192
D min/max/mean-12.04515.4760.000

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Supplemental data

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Sample components

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Entire : Human immunodeficiency virus 1

EntireName: Human immunodeficiency virus 1
Components
  • Virus: Human immunodeficiency virus 1
    • Protein or peptide: Gag polyproteinGroup-specific antigen
  • Ligand: MYRISTIC ACID

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Supramolecule #1: Human immunodeficiency virus 1

SupramoleculeName: Human immunodeficiency virus 1 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: #1
Details: HIV-1 NL4-3 protease defective (D25A) virus particles purified from HEK293T cells.
NCBI-ID: 11676 / Sci species name: Human immunodeficiency virus 1 / Virus type: VIRION / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: No
Host systemOrganism: Homo sapiens (human)

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Macromolecule #1: Gag polyprotein

MacromoleculeName: Gag polyprotein / type: protein_or_peptide / ID: 1 / Number of copies: 24 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 13.084983 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
GARASVLSGG ELDKWEKIRL RPGGKKQYKL KHIVWASREL ERFAVNPGLL ETSEGCRQIL GQLQPSLQTG SEELRSLYNT IAVLYCVHQ RIDVKDTKEA LDKIEEEQNK SKKKAQ

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Macromolecule #2: MYRISTIC ACID

MacromoleculeName: MYRISTIC ACID / type: ligand / ID: 2 / Number of copies: 24 / Formula: MYR
Molecular weightTheoretical: 228.371 Da
Chemical component information

ChemComp-MYR:
MYRISTIC ACID / Myristic acid

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Experimental details

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Structure determination

Methodcryo EM
Processingsubtomogram averaging
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE
DetailsHIV-1 NL4-3 protease defective (D25A) virus particles purified from HEK293T cells.

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 5.0 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 105000
Specialist opticsEnergy filter - Name: GIF Quantum LS / Energy filter - Slit width: 20 eV
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 QUANTUM (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 3.0 e/Å2 / Details: Number of frames ranged from 10-12.
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

ExtractionNumber tomograms: 74 / Number images used: 251207 / Software - Name: MATLAB
CTF correctionSoftware: (Name: CTFFIND, NOVACTF)
Final angle assignmentType: ANGULAR RECONSTITUTION
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 7.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: AV3 / Number subtomograms used: 22417

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Atomic model buiding 1

Initial modelPDB ID:

2h3q

DetailsOnly the backbone of the protein model was fitted as a rigid body.
RefinementProtocol: RIGID BODY FIT
Output model

PDB-7ovq:
Immature HIV-1 matrix structure

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