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- EMDB-22112: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S... -

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Basic information

Entry
Database: EMDB / ID: EMD-22112
TitleHIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab
Map data
Sample
  • Complex: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab
    • Complex: HIV-1 Envelope Glycoprotein BG505 SOSIP.664
      • Protein or peptide: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp120
      • Protein or peptide: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp41
    • Complex: RM20A3 Fab
      • Protein or peptide: RM20A3 Fab Heavy Chain
      • Protein or peptide: RM20A3 Fab Light 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 / Macaca mulatta (Rhesus monkey)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsBerndsen ZT / Ward AB
Funding support United States, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)UM1 AI100663 United States
Bill & Melinda Gates FoundationOPP1115782 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)UM1 AI144462 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2020
Title: Visualization of the HIV-1 Env glycan shield across scales.
Authors: Zachary T Berndsen / Srirupa Chakraborty / Xiaoning Wang / Christopher A Cottrell / Jonathan L Torres / Jolene K Diedrich / Cesar A López / John R Yates / Marit J van Gils / James C Paulson ...Authors: Zachary T Berndsen / Srirupa Chakraborty / Xiaoning Wang / Christopher A Cottrell / Jonathan L Torres / Jolene K Diedrich / Cesar A López / John R Yates / Marit J van Gils / James C Paulson / Sandrasegaram Gnanakaran / Andrew B Ward /
Abstract: The dense array of N-linked glycans on the HIV-1 envelope glycoprotein (Env), known as the "glycan shield," is a key determinant of immunogenicity, yet intrinsic heterogeneity confounds typical ...The dense array of N-linked glycans on the HIV-1 envelope glycoprotein (Env), known as the "glycan shield," is a key determinant of immunogenicity, yet intrinsic heterogeneity confounds typical structure-function analysis. Here, we present an integrated approach of single-particle electron cryomicroscopy (cryo-EM), computational modeling, and site-specific mass spectrometry (MS) to probe glycan shield structure and behavior at multiple levels. We found that dynamics lead to an extensive network of interglycan interactions that drive the formation of higher-order structure within the glycan shield. This structure defines diffuse boundaries between buried and exposed protein surface and creates a mapping of potentially immunogenic sites on Env. Analysis of Env expressed in different cell lines revealed how cryo-EM can detect subtle changes in glycan occupancy, composition, and dynamics that impact glycan shield structure and epitope accessibility. Importantly, this identified unforeseen changes in the glycan shield of Env obtained from expression in the same cell line used for vaccine production. Finally, by capturing the enzymatic deglycosylation of Env in a time-resolved manner, we found that highly connected glycan clusters are resistant to digestion and help stabilize the prefusion trimer, suggesting the glycan shield may function beyond immune evasion.
History
DepositionJun 3, 2020-
Header (metadata) releaseNov 4, 2020-
Map releaseNov 4, 2020-
UpdateDec 2, 2020-
Current statusDec 2, 2020Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.04
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6x9v
  • Surface level: 0.04
  • Imaged by UCSF Chimera
  • Download
  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-6x9v
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22112.png

Downloads & links

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Map

FileDownload / File: emd_22112.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.15 Å
Density
Contour LevelBy AUTHOR: 0.04 / Movie #1: 0.04
Minimum - Maximum-0.08838635 - 0.17479868
Average (Standard dev.)0.00001609812 (±0.005703742)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 322.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.151.151.15
M x/y/z280280280
origin x/y/z0.0000.0000.000
length x/y/z322.000322.000322.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS280280280
D min/max/mean-0.0880.1750.000

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Supplemental data

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Additional map: SPARX 3D Variability

Fileemd_22112_additional_1.map
AnnotationSPARX 3D Variability
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: #1

Fileemd_22112_additional_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Half map: #1

Fileemd_22112_half_map_1.map
Projections & Slices
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Histogram

Histogram (log scale)

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Half map: #2

Fileemd_22112_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S...

EntireName: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab
Components
  • Complex: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab
    • Complex: HIV-1 Envelope Glycoprotein BG505 SOSIP.664
      • Protein or peptide: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp120
      • Protein or peptide: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp41
    • Complex: RM20A3 Fab
      • Protein or peptide: RM20A3 Fab Heavy Chain
      • Protein or peptide: RM20A3 Fab Light Chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S...

SupramoleculeName: HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4

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Supramolecule #2: HIV-1 Envelope Glycoprotein BG505 SOSIP.664

SupramoleculeName: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#2 / Details: deglycosylated by endoglycosidase H
Source (natural)Organism: Human immunodeficiency virus 1
Recombinant expressionOrganism: Homo sapiens (human) / Recombinant cell: HEK293S

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Supramolecule #3: RM20A3 Fab

SupramoleculeName: RM20A3 Fab / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #3-#4
Source (natural)Organism: Macaca mulatta (Rhesus monkey)
Recombinant expressionOrganism: Homo sapiens (human)

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Macromolecule #1: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp120

MacromoleculeName: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp120 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Human immunodeficiency virus 1
Molecular weightTheoretical: 57.945977 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARAENLW VTVYYGVPVW KDAETTLFCA SDAKAYETEK HNVWATHACV PTDPNPQEI HLENVTEEFN MWKNNMVEQM HTDIISLWDQ SLKPCVKLTP LCVTLQCTNV TNNITDDMRG ELKNCSFNMT T ELRDKKQK ...String:
MDAMKRGLCC VLLLCGAVFV SPSQEIHARF RRGARAENLW VTVYYGVPVW KDAETTLFCA SDAKAYETEK HNVWATHACV PTDPNPQEI HLENVTEEFN MWKNNMVEQM HTDIISLWDQ SLKPCVKLTP LCVTLQCTNV TNNITDDMRG ELKNCSFNMT T ELRDKKQK VYSLFYRLDV VQINENQGNR SNNSNKEYRL INCNTSAITQ ACPKVSFEPI PIHYCAPAGF AILKCKDKKF NG TGPCPSV STVQCTHGIK PVVSTQLLLN GSLAEEEVMI RSENITNNAK NILVQFNTPV QINCTRPNNN TRKSIRIGPG QAF YATGDI IGDIRQAHCN VSKATWNETL GKVVKQLRKH FGNNTIIRFA NSSGGDLEVT THSFNCGGEF FYCNTSGLFN STWI SNTSV QGSNSTGSND SITLPCRIKQ IINMWQRIGQ AMYAPPIQGV IRCVSNITGL ILTRDGGSTN STTETFRPGG GDMRD NWRS ELYKYKVVKI EPLGVAPTRC KRRVVGRRRR RR

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Macromolecule #2: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp41

MacromoleculeName: HIV-1 Envelope Glycoprotein BG505 SOSIP.664 gp41 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / 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: RM20A3 Fab Heavy Chain

MacromoleculeName: RM20A3 Fab Heavy Chain / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Macaca mulatta (Rhesus monkey)
Molecular weightTheoretical: 13.511111 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
EVQLVETGGG LVQPGGSLKL SCRASGYTFS SFAMSWVRQA PGKGLEWVSL INDRGGLTFY VDSVKGRFTI SRDNSKNTLS LQMHSLRDG DTAVYYCATG GMSSALQSSK YYFDFWGQGA LVTVSS

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Macromolecule #4: RM20A3 Fab Light Chain

MacromoleculeName: RM20A3 Fab Light Chain / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Macaca mulatta (Rhesus monkey)
Molecular weightTheoretical: 13.5088 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
ALTQPPSVSG SPGQSVTISC TGTSSDIGSY NYVSWYQQHP GKAPKLMIYD VTQRPSGVSD RFSGSKSGNT ASLTISGLQA DDEADYYCS AYAGRQTFYI FGGGTRLTVL GQPKASPTVT LFPPSSEEL

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Macromolecule #7: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 7 / Number of copies: 17 / 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

Concentration7 mg/mL
BufferpH: 7.6 / Component - Name: TBS
GridDetails: unspecified
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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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: DARK FIELD
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 / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionApplied symmetry - Point group: C3 (3 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3) / Number images used: 49389
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-6x9v:
HIV-1 Envelope Glycoprotein BG505 SOSIP.664, expressed in HEK293S cells and deglycosylated by endoglycosidase H, in complex with RM20A3 Fab

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