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- PDB-7ucg: Structure of the DU422 SOSIP.664 trimer in complex with neutraliz... -

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Basic information

Entry
Database: PDB / ID: 7ucg
TitleStructure of the DU422 SOSIP.664 trimer in complex with neutralizing antibody Fab fragments 10-1074 and BG24
Components
  • (Envelope glycoprotein ...) x 2
  • 10-1074 Fab heavy chain
  • 10-1074 light chain
  • BG24 CDRH2-v2 Fab heavy chain
  • BG24 light chain
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / broadly neutralizing antibody / bNAb / HIV-1 / CD4 binding site / VH1-2 / VRC01-class / antiviral protein / VIRAL PROTEIN-IMMUNE SYSTEM complex
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 / fusion of virus membrane with host endosome membrane ...: / 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 / virion membrane / structural molecule activity / 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)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsBarnes, C.O. / Bjorkman, P.J.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)P01 AI100148 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)P50 AI150464 United States
Bill & Melinda Gates FoundationOPP1124068 United States
CitationJournal: Sci Adv / Year: 2022
Title: A naturally arising broad and potent CD4-binding site antibody with low somatic mutation.
Authors: Christopher O Barnes / Till Schoofs / Priyanthi N P Gnanapragasam / Jovana Golijanin / Kathryn E Huey-Tubman / Henning Gruell / Philipp Schommers / Nina Suh-Toma / Yu Erica Lee / Julio C ...Authors: Christopher O Barnes / Till Schoofs / Priyanthi N P Gnanapragasam / Jovana Golijanin / Kathryn E Huey-Tubman / Henning Gruell / Philipp Schommers / Nina Suh-Toma / Yu Erica Lee / Julio C Cetrulo Lorenzi / Alicja Piechocka-Trocha / Johannes F Scheid / Anthony P West / Bruce D Walker / Michael S Seaman / Florian Klein / Michel C Nussenzweig / Pamela J Bjorkman /
Abstract: The induction of broadly neutralizing antibodies (bNAbs) is a potential strategy for a vaccine against HIV-1. However, most bNAbs exhibit features such as unusually high somatic hypermutation, ...The induction of broadly neutralizing antibodies (bNAbs) is a potential strategy for a vaccine against HIV-1. However, most bNAbs exhibit features such as unusually high somatic hypermutation, including insertions and deletions, which make their induction challenging. VRC01-class bNAbs not only exhibit extraordinary breadth and potency but also rank among the most highly somatically mutated bNAbs. Here, we describe a VRC01-class antibody isolated from a viremic controller, BG24, that is much less mutated than most relatives of its class while achieving comparable breadth and potency. A 3.8-Å x-ray crystal structure of a BG24-BG505 Env trimer complex revealed conserved contacts at the gp120 interface characteristic of the VRC01-class Abs, despite lacking common CDR3 sequence motifs. The existence of moderately mutated CD4-binding site (CD4bs) bNAbs such as BG24 provides a simpler blueprint for CD4bs antibody induction by a vaccine, raising the prospect that such an induction might be feasible with a germline-targeting approach.
History
DepositionMar 16, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Aug 17, 2022Provider: repository / Type: Initial release
Revision 1.1Aug 24, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Sep 7, 2022Group: Structure summary / Category: struct / Item: _struct.title

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
B: Envelope glycoprotein gp41
D: BG24 CDRH2-v2 Fab heavy chain
E: BG24 light chain
G: Envelope glycoprotein gp160
H: 10-1074 Fab heavy chain
L: 10-1074 light chain
A: Envelope glycoprotein gp41
C: BG24 CDRH2-v2 Fab heavy chain
F: BG24 light chain
I: Envelope glycoprotein gp160
J: 10-1074 Fab heavy chain
K: 10-1074 light chain
M: Envelope glycoprotein gp41
N: BG24 CDRH2-v2 Fab heavy chain
O: BG24 light chain
P: Envelope glycoprotein gp160
Q: 10-1074 Fab heavy chain
R: 10-1074 light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)534,87466
Polymers514,87818
Non-polymers19,99648
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Envelope glycoprotein ... , 2 types, 6 molecules BAMGIP

#1: Protein Envelope glycoprotein gp41 / Env polyprotein


Mass: 17104.527 Da / Num. of mol.: 3 / Fragment: UNP residues 509-659 / Mutation: Env mimic
Source method: isolated from a genetically manipulated source
Details: Env mimic DU422 SOSIP.664 / Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Cell (production host): Expi293 / Production host: Homo sapiens (human) / References: UniProt: Q202J5
#4: Protein Envelope glycoprotein gp160 / Env polyprotein


Mass: 56999.980 Da / Num. of mol.: 3 / Fragment: UNP residues 28-503
Source method: isolated from a genetically manipulated source
Details: Env mimic DU422 SOSIP.664 / Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: env / Cell (production host): Expi293 / Production host: Homo sapiens (human) / References: UniProt: Q202J5

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Protein , 1 types, 3 molecules EFO

#3: Protein BG24 light chain


Mass: 21925.209 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell (production host): Expi293 / Production host: Homo sapiens (human)

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Antibody , 3 types, 9 molecules DCNHJQLKR

#2: Antibody BG24 CDRH2-v2 Fab heavy chain


Mass: 25498.590 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell (production host): Expi293 / Production host: Homo sapiens (human)
#5: Antibody 10-1074 Fab heavy chain


Mass: 26389.465 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell (production host): Expi293 / Production host: Homo sapiens (human)
#6: Antibody 10-1074 light chain


Mass: 23708.293 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Cell (production host): Expi293 / Production host: Homo sapiens (human)

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Sugars , 4 types, 48 molecules

#7: Polysaccharide...
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 21
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#8: Polysaccharide alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2- ...alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 910.823 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-3[DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3/a4-b1_b4-c1_c3-d1_c6-e1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{}[(6+1)][a-D-Manp]{}}}}LINUCSPDB-CARE
#9: Polysaccharide alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-alpha-D- ...alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-3)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1235.105 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-2DManpa1-3[DManpa1-3DManpa1-6]DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,7,6/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5]/1-1-2-3-3-3-3/a4-b1_b4-c1_c3-d1_c6-f1_d2-e1_f3-g1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-Manp]{}}[(6+1)][a-D-Manp]{[(3+1)][a-D-Manp]{}}}}}LINUCSPDB-CARE
#10: Sugar...
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 21 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Complex of DU422 SOSIP trimer bound to 10-1074 and BG24 Fab fragments
Type: COMPLEX / Entity ID: #1-#6 / Source: MULTIPLE SOURCES
Molecular weightValue: .65 MDa / Experimental value: YES
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
31Human immunodeficiency virus 111676
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenConc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 295 K

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 3.5 sec. / Electron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1989

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
4CTFFINDCTF correction
7UCSF Chimeramodel fitting
9cryoSPARC2.12initial Euler assignment
10RELION3final Euler assignment
11RELION3classification
12RELION33D reconstruction
13PHENIX1.19model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 455671
SymmetryPoint symmetry: C3 (3 fold cyclic)
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 204220 / Algorithm: FOURIER SPACE / Num. of class averages: 2 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL / Target criteria: Correlation coefficient
Atomic model buildingPDB-ID: 5CEZ

5cez

RefinementHighest resolution: 3.5 Å
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00425965
ELECTRON MICROSCOPYf_angle_d0.84835259
ELECTRON MICROSCOPYf_dihedral_angle_d7.5514005
ELECTRON MICROSCOPYf_chiral_restr0.0774185
ELECTRON MICROSCOPYf_plane_restr0.0064362

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