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- PDB-8ut6: CryoEM structure of A/Perth/16/2009 H3 in complex with polyclonal... -

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Basic information

Entry
Database: PDB / ID: 8ut6
TitleCryoEM structure of A/Perth/16/2009 H3 in complex with polyclonal Fab from mice immunized with H3 stem nanoparticles-15 days post immunization
Components
  • H3D15 pFab HC Fv_polyA
  • H3D15 pFab LC Fv_polyA
  • Hemagglutinin
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / cryoEMPEM / Flu Hemagglutinin / Central stem epitope / VH1-18 / VIRAL PROTEIN / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


viral budding from plasma membrane / clathrin-dependent endocytosis of virus by host cell / host cell surface receptor binding / apical plasma membrane / 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
Similarity search - Function
Haemagglutinin, influenzavirus A / Haemagglutinin, HA1 chain, alpha/beta domain superfamily / Haemagglutinin / Haemagglutinin, influenzavirus A/B / Viral capsid/haemagglutinin protein
Similarity search - Domain/homology
Biological speciesInfluenza A virus
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsHuang, J. / Han, J. / Ward, A.B.
Funding support United States, 1items
OrganizationGrant numberCountry
Bill & Melinda Gates FoundationINV-004923 United States
CitationJournal: Immunity / Year: 2024
Title: Eliciting a single amino acid change by vaccination generates antibody protection against group 1 and group 2 influenza A viruses.
Authors: Rashmi Ray / Faez Amokrane Nait Mohamed / Daniel P Maurer / Jiachen Huang / Berk A Alpay / Larance Ronsard / Zhenfei Xie / Julianna Han / Monica Fernandez-Quintero / Quynh Anh Phan / Rebecca ...Authors: Rashmi Ray / Faez Amokrane Nait Mohamed / Daniel P Maurer / Jiachen Huang / Berk A Alpay / Larance Ronsard / Zhenfei Xie / Julianna Han / Monica Fernandez-Quintero / Quynh Anh Phan / Rebecca L Ursin / Mya Vu / Kathrin H Kirsch / Thavaleak Prum / Victoria C Rosado / Thalia Bracamonte-Moreno / Vintus Okonkwo / Julia Bals / Caitlin McCarthy / Usha Nair / Masaru Kanekiyo / Andrew B Ward / Aaron G Schmidt / Facundo D Batista / Daniel Lingwood /
Abstract: Broadly neutralizing antibodies (bnAbs) targeting the hemagglutinin (HA) stem of influenza A viruses (IAVs) tend to be effective against either group 1 or group 2 viral diversity. In rarer cases, ...Broadly neutralizing antibodies (bnAbs) targeting the hemagglutinin (HA) stem of influenza A viruses (IAVs) tend to be effective against either group 1 or group 2 viral diversity. In rarer cases, intergroup protective bnAbs can be generated by human antibody paratopes that accommodate the conserved glycan differences between the group 1 and group 2 stems. We applied germline-engaging nanoparticle immunogens to elicit a class of cross-group bnAbs from physiological precursor frequency within a humanized mouse model. Cross-group protection depended on the presence of the human bnAb precursors within the B cell repertoire, and the vaccine-expanded antibodies enriched for an N55T substitution in the CDRH2 loop, a hallmark of the bnAb class. Structurally, this single mutation introduced a flexible fulcrum to accommodate glycosylation differences and could alone enable cross-group protection. Thus, broad IAV immunity can be expanded from the germline repertoire via minimal antigenic input and an exceptionally simple antibody development pathway.
History
DepositionOct 30, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 8, 2024Provider: repository / Type: Initial release
Revision 1.1May 29, 2024Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
G: H3D15 pFab HC Fv_polyA
H: H3D15 pFab LC Fv_polyA
A: Hemagglutinin
C: Hemagglutinin
E: Hemagglutinin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)213,22426
Polymers207,9695
Non-polymers5,25521
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 H3D15 pFab HC Fv_polyA


Mass: 10741.231 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse)
#2: Protein H3D15 pFab LC Fv_polyA


Mass: 9124.238 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse)
#3: Protein Hemagglutinin


Mass: 62701.074 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Details: A/Perth/16/2009 H3 / Source: (gene. exp.) Influenza A virus / Gene: HA / Production host: Homo sapiens (human) / References: UniProt: C6KNH7
#4: 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.: 3
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
#5: 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.: 18 / 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

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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
IDNameTypeEntity IDParent-IDSource
1Mice polyclonal Fab complex with one protomer of a H3 trimerCOMPLEX#1-#30RECOMBINANT
2Polyclonal Fab purified from mice seraCOMPLEX#1-#21NATURAL
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Influenza A virus11320
32Mus musculus (house mouse)10090
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
Buffer solutionpH: 7.4
Buffer component
IDConc.FormulaBuffer-ID
150 nMTris1
2100 nMNaCl1
30.1 %Octyl-beta-Glucoside1
SpecimenConc.: 0.7 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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Electron microscopy imaging

MicroscopyModel: TFS GLACIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1500 nm / Nominal defocus min: 700 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4particle selection
2EPUimage acquisition
4cryoSPARC4CTF correction
13cryoSPARC43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 382032 / Symmetry type: POINT
RefinementCross valid method: NONE

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