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- PDB-8u1d: Cryo-EM structure of vaccine-elicited CD4 binding site antibody D... -

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Basic information

Entry
Database: PDB / ID: 8u1d
TitleCryo-EM structure of vaccine-elicited CD4 binding site antibody DH1285 bound to HIV-1 CH505TFchim.6R.SOSIP.664v4.1 Env Local Refinement
Components
  • DH1285 Heavy Chain
  • DH1285 Light Chain
  • Envelope glycoprotein gp120
KeywordsVIRAL PROTEIN / HIV-1 Vaccine induced neutralizing antibody / CD4 binding site antibody / gp120 / DH1285 / IgG / rhesus macaques / CH505M5chimer.6R.SOSIP.664v4.1 Env
Biological speciesHuman immunodeficiency virus 1
Macaca mulatta (Rhesus monkey)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.25 Å
AuthorsThakur, B. / Stalls, V.D. / Acharya, P.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01 AI145687 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)UM1 AI144371 United States
CitationJournal: Cell / Year: 2024
Title: Vaccine induction of CD4-mimicking HIV-1 broadly neutralizing antibody precursors in macaques.
Authors: Kevin O Saunders / James Counts / Bhishem Thakur / Victoria Stalls / Robert Edwards / Kartik Manne / Xiaozhi Lu / Katayoun Mansouri / Yue Chen / Rob Parks / Maggie Barr / Laura Sutherland / ...Authors: Kevin O Saunders / James Counts / Bhishem Thakur / Victoria Stalls / Robert Edwards / Kartik Manne / Xiaozhi Lu / Katayoun Mansouri / Yue Chen / Rob Parks / Maggie Barr / Laura Sutherland / Joena Bal / Nicholas Havill / Haiyan Chen / Emily Machiele / Nolan Jamieson / Bhavna Hora / Megan Kopp / Katarzyna Janowska / Kara Anasti / Chuancang Jiang / Elizabeth Van Itallie / Sravani Venkatayogi / Amanda Eaton / Rory Henderson / Christopher Barbosa / S Munir Alam / Sampa Santra / Drew Weissman / M Anthony Moody / Derek W Cain / Ying K Tam / Mark Lewis / Wilton B Williams / Kevin Wiehe / David C Montefiori / Priyamvada Acharya / Barton F Haynes /
Abstract: The CD4-binding site (CD4bs) is a conserved epitope on HIV-1 envelope (Env) that can be targeted by protective broadly neutralizing antibodies (bnAbs). HIV-1 vaccines have not elicited CD4bs bnAbs ...The CD4-binding site (CD4bs) is a conserved epitope on HIV-1 envelope (Env) that can be targeted by protective broadly neutralizing antibodies (bnAbs). HIV-1 vaccines have not elicited CD4bs bnAbs for many reasons, including the occlusion of CD4bs by glycans, expansion of appropriate naive B cells with immunogens, and selection of functional antibody mutations. Here, we demonstrate that immunization of macaques with a CD4bs-targeting immunogen elicits neutralizing bnAb precursors with structural and genetic features of CD4-mimicking bnAbs. Structures of the CD4bs nAb bound to HIV-1 Env demonstrated binding angles and heavy-chain interactions characteristic of all known human CD4-mimicking bnAbs. Macaque nAb were derived from variable and joining gene segments orthologous to the genes of human VH1-46-class bnAb. This vaccine study initiated in primates the B cells from which CD4bs bnAbs can derive, accomplishing the key first step in the development of an effective HIV-1 vaccine.
History
DepositionAug 31, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 3, 2024Provider: repository / Type: Initial release
Revision 1.1Jul 17, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._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 / _em_admin.last_update
Revision 1.2Nov 13, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Envelope glycoprotein gp120
I: DH1285 Heavy Chain
J: DH1285 Light Chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)124,5284
Polymers124,3063
Non-polymers2211
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Envelope glycoprotein gp120


Mass: 72669.078 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: CH505M5chimer.6R.SOSIP.664v4.1 / Source: (gene. exp.) Human immunodeficiency virus 1 / Production host: Homo sapiens (human)
#2: Antibody DH1285 Heavy Chain


Mass: 26396.316 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Homo sapiens (human)
#3: Antibody DH1285 Light Chain


Mass: 25240.955 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Macaca mulatta (Rhesus monkey) / Production host: Homo sapiens (human)
#4: 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


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1 / 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
Has ligand of interestN
Has protein modificationY

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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

Component
IDNameTypeDetailsEntity IDParent-IDSource
1The complex of vaccine elicited CD4 binding site neutralizing antibody DH1285 Fab with CH505M5chimer.6R.SOSIP.664v4.1 EnvCOMPLEXOne of the gp120 protomer bound to DH1285 locally refined to get precise information about the interacting residues.#1-#30RECOMBINANT
2Envelope glycoprotein gp120COMPLEX#11RECOMBINANT
3DH1285 Heavy Chain, DH1285 Light ChainCOMPLEX#2-#31RECOMBINANT
Molecular weightValue: 0.308 MDa
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Human immunodeficiency virus 111676
23Macaca mulatta (Rhesus monkey)9544
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Homo sapiens (human)9606
23Homo sapiens (human)9606
Buffer solutionpH: 8
SpecimenEmbedding 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: LEICA EM GP / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 295 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 59.1 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
4cryoSPARCCTF correction
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 14427340
3D reconstructionResolution: 4.25 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 146444 / Symmetry type: POINT
Atomic model buildingSpace: REAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0055222
ELECTRON MICROSCOPYf_angle_d1.0097085
ELECTRON MICROSCOPYf_dihedral_angle_d6.258710
ELECTRON MICROSCOPYf_chiral_restr0.058789
ELECTRON MICROSCOPYf_plane_restr0.008908

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