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- EMDB-25186: Asymmetric reconstruction of membrane-bound HIV Env from virus-li... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-25186 | ||||||||||||
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Title | Asymmetric reconstruction of membrane-bound HIV Env from virus-like particles | ||||||||||||
![]() | Asymmetric reconstruction of HIV Env glycoprotein (ADA.CM.v4) on virus-like particle membrane | ||||||||||||
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![]() | HIV-1 / envelope protein / glycoprotein / Env / membrane bound / VIRAL PROTEIN | ||||||||||||
Function / homology | ![]() virus-mediated perturbation of host defense response => GO:0019049 / : / stimulatory C-type lectin receptor signaling pathway / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / membrane => GO:0016020 / viral protein processing ...virus-mediated perturbation of host defense response => GO:0019049 / : / stimulatory C-type lectin receptor signaling pathway / positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / membrane => GO:0016020 / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / host cell plasma membrane / structural molecule activity / virion membrane / plasma membrane Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() | ||||||||||||
Method | subtomogram averaging / cryo EM / Resolution: 10.67 Å | ||||||||||||
![]() | Mangala Prasad V / Lee KK | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-ET of Env on intact HIV virions reveals structural variation and positioning on the Gag lattice. Authors: Vidya Mangala Prasad / Daniel P Leaman / Klaus N Lovendahl / Jacob T Croft / Mark A Benhaim / Edgar A Hodge / Michael B Zwick / Kelly K Lee / ![]() Abstract: HIV-1 Env mediates viral entry into host cells and is the sole target for neutralizing antibodies. However, Env structure and organization in its native virion context has eluded detailed ...HIV-1 Env mediates viral entry into host cells and is the sole target for neutralizing antibodies. However, Env structure and organization in its native virion context has eluded detailed characterization. Here, we used cryo-electron tomography to analyze Env in mature and immature HIV-1 particles. Immature particles showed distinct Env positioning relative to the underlying Gag lattice, providing insights into long-standing questions about Env incorporation. A 9.1-Å sub-tomogram-averaged reconstruction of virion-bound Env in conjunction with structural mass spectrometry revealed unexpected features, including a variable central core of the gp41 subunit, heterogeneous glycosylation between protomers, and a flexible stalk that allows Env tilting and variable exposure of neutralizing epitopes. Together, our results provide an integrative understanding of HIV assembly and structural variation in Env antigen presentation. | ||||||||||||
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 | ![]() | 535.8 KB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.5 KB 14.5 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 4.4 KB | Display | ![]() |
Images | ![]() | 70.1 KB | ||
Filedesc metadata | ![]() | 6.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related 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
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Annotation | Asymmetric reconstruction of HIV Env glycoprotein (ADA.CM.v4) on virus-like particle membrane | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 2.58 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 : Human immunodeficiency virus 1
Entire | Name: ![]() ![]() |
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Components |
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-Supramolecule #1: Human immunodeficiency virus 1
Supramolecule | Name: Human immunodeficiency virus 1 / type: virus / ID: 1 / Parent: 0 / Macromolecule list: all Details: HIV-1 ADA.CM Env glycoprotein displayed on high Env expressing VLPs NCBI-ID: 11676 / Sci species name: Human immunodeficiency virus 1 / Virus type: VIRUS-LIKE PARTICLE / Virus isolate: STRAIN / Virus enveloped: Yes / Virus empty: No |
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Host (natural) | Organism: ![]() |
Molecular weight | Theoretical: 400 KDa |
Virus shell | Shell ID: 1 / Name: Outer membrane envelope / Diameter: 1000.0 Å |
-Macromolecule #1: HIV Envelope glycoprotein
Macromolecule | Name: HIV Envelope glycoprotein / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Recombinant expression | Organism: ![]() |
Sequence | String: MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARTEKLW VTVYYGVPVW KEATTTLFCA SDAKAYDTEV HNVWATHACV PTDPNPQEVV LENVTENFNM WKNNMVEQMH EDIISLWDQS LKPCVKLTPL CVTLNCTDLR NVTNSSSEGM RGEIKNCSFN ITTSIRDKVK ...String: MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARTEKLW VTVYYGVPVW KEATTTLFCA SDAKAYDTEV HNVWATHACV PTDPNPQEVV LENVTENFNM WKNNMVEQMH EDIISLWDQS LKPCVKLTPL CVTLNCTDLR NVTNSSSEGM RGEIKNCSFN ITTSIRDKVK KDYALFYRLD VVPIDNDNTS YRLINCNTST ITQACPKVSF EPIPIHYCTP AGFAILKCKD KKFNGTGPCK NVSTVQCTHG IRPVVSTQLL LNGSLAEEEV VIRSSNFTDN AKNIIVQLKE SVEINCTRPN NNTRKSIHIG PGRAFYTTGE IIGDIRQAHC NISRTKWNNT LNQIATKLKE QFGNNKTIVF NQSSGGDPEI VMHSFNCGGE FFYCNSTQLF NSTWNFNGTW NLTQSNGTEG NDTITLPCRI KQIINMWQEV GKAMYAPPIR GQIRCSSNIT GLILTRDGGT NSSGSEIFRP GGGDMRDNWR SELYKYKVVK IEPLGVAPTK AKRRVVQREK RAVGTIGAMF LGFLGAAGST MGAASMTLTV QARQLLSGIV QQQNNLLRAI EAQQHLLQLT VWGIRQLQAR VLAVERYLRD QQLLGIWGCS GKLICTTAVP WNASWSNKSL EQIWNNMTWM EWDREINNYT SLIHSLIEEA QNQQEKNEQE LLELDKWASL WNWFNITNWL WYIKLFIMIV GGLVGLRIVF AVLSIVNRVR QGYSPLSFQT HLPTPRGPDR PEGIEEEGGE RDRDRSIRLV NGFLAL |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | subtomogram averaging |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.4 / Component - Name: Phosphate buffer saline / Details: 1X PBS at pH 7.4 |
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Grid | Model: C-flat-1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: OTHER |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 3ul sample, blotting time of 4-5 seconds. |
Details | VLP particles displaying nearly full-length Env glycoprotein on membrane surface |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 2.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 5.0 µm / Nominal defocus min: 2.5 µm / Nominal magnification: 58000 |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Initial model | PDB ID: Chain - Source name: PDB / Chain - Initial model type: experimental model |
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Refinement | Space: REAL / Protocol: RIGID BODY FIT / Target criteria: Correlation coefficient |