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- EMDB-25022: Cytoplasmic tail deleted HIV Env trimer in nanodisc -

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ID or keywords:

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Basic information

Entry
Database: EMDB / ID: EMD-25022
TitleCytoplasmic tail deleted HIV Env trimer in nanodisc
Map dataCryo-EM map of nanodisc embedded HIV-1 Env protein
Sample
  • Organelle or cellular component: HIV-1 envelope glycoprotein Env trimer
    • Protein or peptide: Envelope glycoprotein gp120
    • Protein or peptide: Transmembrane protein gp41
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
Function / homology
Function and homology information


: / 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 / virus-mediated perturbation of host defense response ...: / 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 / virus-mediated perturbation of host defense response / 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
Envelope glycoprotein Gp160 / Retroviral envelope protein / Retroviral envelope protein GP41-like / Gp120 core superfamily / Envelope glycoprotein GP120 / Human immunodeficiency virus 1, envelope glycoprotein Gp120
Similarity search - Domain/homology
Envelope glycoprotein gp160 / Envelope glycoprotein gp160
Similarity search - Component
Biological speciesHIV whole-genome vector AA1305#18 (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.88 Å
AuthorsYang S / Walz T
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: Nat Commun / Year: 2022
Title: Dynamic HIV-1 spike motion creates vulnerability for its membrane-bound tripod to antibody attack.
Authors: Shuang Yang / Giorgos Hiotis / Yi Wang / Junjian Chen / Jia-Huai Wang / Mikyung Kim / Ellis L Reinherz / Thomas Walz /
Abstract: Vaccines targeting HIV-1's gp160 spike protein are stymied by high viral mutation rates and structural chicanery. gp160's membrane-proximal external region (MPER) is the target of naturally arising ...Vaccines targeting HIV-1's gp160 spike protein are stymied by high viral mutation rates and structural chicanery. gp160's membrane-proximal external region (MPER) is the target of naturally arising broadly neutralizing antibodies (bnAbs), yet MPER-based vaccines fail to generate bnAbs. Here, nanodisc-embedded spike protein was investigated by cryo-electron microscopy and molecular-dynamics simulations, revealing spontaneous ectodomain tilting that creates vulnerability for HIV-1. While each MPER protomer radiates centrally towards the three-fold axis contributing to a membrane-associated tripod structure that is occluded in the upright spike, tilting provides access to the opposing MPER. Structures of spike proteins with bound 4E10 bnAb Fabs reveal that the antibody binds exposed MPER, thereby altering MPER dynamics, modifying average ectodomain tilt, and imposing strain on the viral membrane and the spike's transmembrane segments, resulting in the abrogation of membrane fusion and informing future vaccine development.
History
DepositionSep 27, 2021-
Header (metadata) releaseNov 9, 2022-
Map releaseNov 9, 2022-
UpdateFeb 22, 2023-
Current statusFeb 22, 2023Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_25022.png

Downloads & links

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Map

FileDownload / File: emd_25022.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM map of nanodisc embedded HIV-1 Env protein
Voxel sizeX=Y=Z: 1.03 Å
Density
Contour LevelBy AUTHOR: 0.0109
Minimum - Maximum-0.015679142 - 0.03964927
Average (Standard dev.)0.000234063 (±0.0013459697)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 395.52 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : HIV-1 envelope glycoprotein Env trimer

EntireName: HIV-1 envelope glycoprotein Env trimer
Components
  • Organelle or cellular component: HIV-1 envelope glycoprotein Env trimer
    • Protein or peptide: Envelope glycoprotein gp120
    • Protein or peptide: Transmembrane protein gp41
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: HIV-1 envelope glycoprotein Env trimer

SupramoleculeName: HIV-1 envelope glycoprotein Env trimer / type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: HIV whole-genome vector AA1305#18 (others) / Strain: BG505

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Macromolecule #1: Envelope glycoprotein gp120

MacromoleculeName: Envelope glycoprotein gp120 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: HIV whole-genome vector AA1305#18 (others)
Molecular weightTheoretical: 53.09207 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: AENLWVTVYY GVPVWKDAET TLFCASDARA YETEKHNVWA THACVPTDPN PQEIHLENVT EEFNMWKNNM VEQMHTDIIS LWDQSLKPC VKLTPLCVTL QCTNVTNNIT DDMRGELKNC SFNMTTELRD KKQKVYSLFY RLDVVQINEN QGNRSNNSNK E YRLINCNT ...String:
AENLWVTVYY GVPVWKDAET TLFCASDARA YETEKHNVWA THACVPTDPN PQEIHLENVT EEFNMWKNNM VEQMHTDIIS LWDQSLKPC VKLTPLCVTL QCTNVTNNIT DDMRGELKNC SFNMTTELRD KKQKVYSLFY RLDVVQINEN QGNRSNNSNK E YRLINCNT SAITQACPKV SFEPIPIHYC APAGFAILKC KDKKFNGTGP CPSVSTVQCT HGIKPVVSTQ LLLNGSLAEE EV MIRSENI TNNAKNILVQ FNTPVQINCT RPNNNTRKSI RIGPGQAFYA TGDIIGDIRQ AHCNVSKATW NETLGKVVKQ LRK HFGNNT IIRFANSSGG DLEVTTHSFN CGGEFFYCNT SGLFNSTWIS NTSVQGSNST GSNDSITLPC RIKQIINMWQ RIGQ AMYAP PIQGVIRCVS NITGLILTRD GGSTNSTTET FRPGGGDMRD NWRSELYKYK VVKIEPLGVA PTRCKRRVV

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Macromolecule #2: Transmembrane protein gp41

MacromoleculeName: Transmembrane protein gp41 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: HIV whole-genome vector AA1305#18 (others)
Molecular weightTheoretical: 24.11477 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: AVGIGAVFLG FLGAAGSTMG AASMTLTVQA RNLLSGIVQQ QSNLLRAPEA QQHLLKLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KLICCTNVPW NSSWSNRNLS EIWDNMTWLQ WEKEISNYTQ LIYGLLEESQ NQQEKNEQDL LALDKWASLW N WFDISNWL ...String:
AVGIGAVFLG FLGAAGSTMG AASMTLTVQA RNLLSGIVQQ QSNLLRAPEA QQHLLKLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KLICCTNVPW NSSWSNRNLS EIWDNMTWLQ WEKEISNYTQ LIYGLLEESQ NQQEKNEQDL LALDKWASLW N WFDISNWL WYIKIFIMIV GGLIGLRIVF TVLSIVNRVR QGYSPLSFQT HLPA

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Macromolecule #5: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 5 / Number of copies: 36 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.2 mg/mL
BufferpH: 7.5
GridModel: Quantifoil R1.2/1.3 / Material: GRAPHENE OXIDE
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 80.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6ulc

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.88 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 47616
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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