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- EMDB-20224: BG505 SOSIP.664 with 2G12 Fab2 -

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Basic information

Entry
Database: EMDB / ID: EMD-20224
TitleBG505 SOSIP.664 with 2G12 Fab2
Map dataBG505 SOSIP.664 with 2G12 Fab2
Sample
  • Complex: BG505 SOSIP.664 with 2G12 Fab2
    • Protein or peptide: Envelope glycoprotein gp160
    • Protein or peptide: Envelope glycoprotein gp41
    • Protein or peptide: 2G12 Fab light chain
    • Protein or peptide: 2G12 Fab Heavy chain
  • 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 / virus-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope ...positive regulation of plasma membrane raft polarization / positive regulation of receptor clustering / positive regulation of establishment of T cell polarity / virus-mediated perturbation of host defense response / host cell endosome membrane / clathrin-dependent endocytosis of virus by host cell / viral protein processing / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / structural molecule activity / virion attachment to host cell / host cell plasma membrane / virion membrane / identical protein binding / 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
Similarity search - Component
Biological speciesHuman immunodeficiency virus 1 / Homo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.79 Å
AuthorsCottrell CA / de Val N / Ward AB
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI110657 United States
CitationJournal: Structure / Year: 2020
Title: Networks of HIV-1 Envelope Glycans Maintain Antibody Epitopes in the Face of Glycan Additions and Deletions.
Authors: Gemma E Seabright / Christopher A Cottrell / Marit J van Gils / Alessio D'addabbo / David J Harvey / Anna-Janina Behrens / Joel D Allen / Yasunori Watanabe / Nicole Scaringi / Thomas M ...Authors: Gemma E Seabright / Christopher A Cottrell / Marit J van Gils / Alessio D'addabbo / David J Harvey / Anna-Janina Behrens / Joel D Allen / Yasunori Watanabe / Nicole Scaringi / Thomas M Polveroni / Allison Maker / Snezana Vasiljevic / Natalia de Val / Rogier W Sanders / Andrew B Ward / Max Crispin /
Abstract: Numerous broadly neutralizing antibodies (bnAbs) have been identified that target the glycans of the HIV-1 envelope spike. Neutralization breadth is notable given that glycan processing can be ...Numerous broadly neutralizing antibodies (bnAbs) have been identified that target the glycans of the HIV-1 envelope spike. Neutralization breadth is notable given that glycan processing can be substantially influenced by the presence or absence of neighboring glycans. Here, using a stabilized recombinant envelope trimer, we investigate the degree to which mutations in the glycan network surrounding an epitope impact the fine glycan processing of antibody targets. Using cryo-electron microscopy and site-specific glycan analysis, we reveal the importance of glycans in the formation of the 2G12 bnAb epitope and show that the epitope is only subtly impacted by variations in the glycan network. In contrast, we show that the PG9 and PG16 glycan-based epitopes at the trimer apex are dependent on the presence of the highly conserved surrounding glycans. Glycan networks underpin the conservation of bnAb epitopes and are an important parameter in immunogen design.
History
DepositionMay 15, 2019-
Header (metadata) releaseAug 21, 2019-
Map releaseMay 20, 2020-
UpdateAug 19, 2020-
Current statusAug 19, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6ozc
  • Surface level: 0.3
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_20224.png

Downloads & links

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Map

FileDownload / File: emd_20224.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationBG505 SOSIP.664 with 2G12 Fab2
Voxel sizeX=Y=Z: 1.31 Å
Density
Contour LevelBy AUTHOR: 0.3 / Movie #1: 0.3
Minimum - Maximum-0.86141336 - 1.7129121
Average (Standard dev.)0.00131789 (±0.061129466)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 335.36 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.311.311.31
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z335.360335.360335.360
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.8611.7130.001

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Supplemental data

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Sample components

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Entire : BG505 SOSIP.664 with 2G12 Fab2

EntireName: BG505 SOSIP.664 with 2G12 Fab2
Components
  • Complex: BG505 SOSIP.664 with 2G12 Fab2
    • Protein or peptide: Envelope glycoprotein gp160
    • Protein or peptide: Envelope glycoprotein gp41
    • Protein or peptide: 2G12 Fab light chain
    • Protein or peptide: 2G12 Fab Heavy chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: BG505 SOSIP.664 with 2G12 Fab2

SupramoleculeName: BG505 SOSIP.664 with 2G12 Fab2 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Human immunodeficiency virus 1
Recombinant expressionOrganism: Homo sapiens (human) / Recombinant cell: HEK293F

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Macromolecule #1: Envelope glycoprotein gp160

MacromoleculeName: Envelope glycoprotein gp160 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 53.121105 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: AENLWVTVYY GVPVWKDAET TLFCASDAKA YETEKHNVWA THACVPTDPN PQEIHLENVT EEFNMWKNNM VEQMHTDIIS LWDQSLKPC VKLTPLCVTL QCTNVTNNIT DDMRGELKNC SFNMTTELRD KKQKVYSLFY RLDVVQINEN QGNRSNNSNK E YRLINCNT ...String:
AENLWVTVYY GVPVWKDAET TLFCASDAKA 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 PTRCKRRVVG

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Macromolecule #2: Envelope glycoprotein gp41

MacromoleculeName: Envelope glycoprotein gp41 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 17.146482 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
AVGIGAVFLG FLGAAGSTMG AASMTLTVQA RNLLSGIVQQ QSNLLRAPEA QQHLLKLTVW GIKQLQARVL AVERYLRDQQ LLGIWGCSG KLICCTNVPW NSSWSNRNLS EIWDNMTWLQ WDKEISNYTQ IIYGLLEESQ NQQEKNEQDL LALD

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Macromolecule #3: 2G12 Fab light chain

MacromoleculeName: 2G12 Fab light chain / type: protein_or_peptide / ID: 3 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.24585 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DVVMTQSPST LSASVGDTIT ITCRASQSIE TWLAWYQQKP GKAPKLLIYK ASTLKTGVPS RFSGSGSGTE FTLTISGLQF DDFATYHCQ HYAGYSATFG QGTRVEIKRT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS ...String:
DVVMTQSPST LSASVGDTIT ITCRASQSIE TWLAWYQQKP GKAPKLLIYK ASTLKTGVPS RFSGSGSGTE FTLTISGLQF DDFATYHCQ HYAGYSATFG QGTRVEIKRT VAAPSVFIFP PSDEQLKSGT ASVVCLLNNF YPREAKVQWK VDNALQSGNS Q ESVTEQDS KDSTYSLSST LTLSKADYEK HKVYACEVTH QGLSSPVTKS FNRGE

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Macromolecule #4: 2G12 Fab Heavy chain

MacromoleculeName: 2G12 Fab Heavy chain / type: protein_or_peptide / ID: 4 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 23.845791 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: EVQLVESGGG LVKAGGSLIL SCGVSNFRIS AHTMNWVRRV PGGGLEWVAS ISTSSTYRDY ADAVKGRFTV SRDDLEDFVY LQMHKMRVE DTAIYYCARK GSDRLSDNDP FDAWGPGTVV TVSPASTKGP SVFPLAPSSK STSGGTAALG CLVKDYFPEP V TVSWNSGA ...String:
EVQLVESGGG LVKAGGSLIL SCGVSNFRIS AHTMNWVRRV PGGGLEWVAS ISTSSTYRDY ADAVKGRFTV SRDDLEDFVY LQMHKMRVE DTAIYYCARK GSDRLSDNDP FDAWGPGTVV TVSPASTKGP SVFPLAPSSK STSGGTAALG CLVKDYFPEP V TVSWNSGA LTSGVHTFPA VLQSSGLYSL SSVVTVPSSS LGTQTYICNV NHKPSNTKVD KKVEPK

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Macromolecule #12: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 12 / Number of copies: 21 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

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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

BufferpH: 7.4
GridModel: C-flat-2/2 4C / Material: COPPER / Pretreatment - Type: PLASMA CLEANING
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: 0.003 µm / Nominal defocus min: 0.0015 µm / Nominal magnification: 22500
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 2184 / Average exposure time: 10.0 sec. / Average electron dose: 76.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: Gctf
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: NOT APPLICABLE
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.79 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 2) / Number images used: 68155

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