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- EMDB-42534: CryoEM structure of A/Shanghai/1/2013 H7 in complex with polyclon... -

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Basic information

Entry
Database: EMDB / ID: EMD-42534
TitleCryoEM structure of A/Shanghai/1/2013 H7 in complex with polyclonal Fab from mice immunized with H7 stem nanoparticles-28 days post immunization
Map dataShanghaiH7_H7D28_sharp
Sample
  • Complex: Mice polyclonal Fab complex with one protomer of a H7 trimer
    • Complex: H7D28 polyclonal Fab purified from mice sera
      • Protein or peptide: H7D28 pFab HC Fv_polyA
      • Protein or peptide: H7D28 pFab LC Fv_polyA
    • Protein or peptide: Hemagglutinin HA1 chain
    • Protein or peptide: Hemagglutinin HA2 chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordscryoEMPEM / 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
Hemagglutinin / Hemagglutinin
Similarity search - Component
Biological speciesInfluenza A virus / Mus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsHuang J / Han J / Ward AB
Funding support United States, 1 items
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, 2023-
Header (metadata) releaseMay 8, 2024-
Map releaseMay 8, 2024-
UpdateMay 29, 2024-
Current statusMay 29, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42534.png

Downloads & links

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Map

FileDownload / File: emd_42534.map.gz / Format: CCP4 / Size: 325 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationShanghaiH7_H7D28_sharp
Voxel sizeX=Y=Z: 0.725 Å
Density
Contour LevelBy AUTHOR: 0.17
Minimum - Maximum-0.49395484 - 0.73391455
Average (Standard dev.)0.0000003890243 (±0.015537138)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions440440440
Spacing440440440
CellA=B=C: 319.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: ShanghaiH7 H7D28 halfA

Fileemd_42534_half_map_1.map
AnnotationShanghaiH7_H7D28_halfA
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: ShanghaiH7 H7D28 halfB

Fileemd_42534_half_map_2.map
AnnotationShanghaiH7_H7D28_halfB
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Mice polyclonal Fab complex with one protomer of a H7 trimer

EntireName: Mice polyclonal Fab complex with one protomer of a H7 trimer
Components
  • Complex: Mice polyclonal Fab complex with one protomer of a H7 trimer
    • Complex: H7D28 polyclonal Fab purified from mice sera
      • Protein or peptide: H7D28 pFab HC Fv_polyA
      • Protein or peptide: H7D28 pFab LC Fv_polyA
    • Protein or peptide: Hemagglutinin HA1 chain
    • Protein or peptide: Hemagglutinin HA2 chain
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: Mice polyclonal Fab complex with one protomer of a H7 trimer

SupramoleculeName: Mice polyclonal Fab complex with one protomer of a H7 trimer
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Influenza A virus

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Supramolecule #2: H7D28 polyclonal Fab purified from mice sera

SupramoleculeName: H7D28 polyclonal Fab purified from mice sera / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #3-#4
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: Hemagglutinin HA1 chain

MacromoleculeName: Hemagglutinin HA1 chain / type: protein_or_peptide / ID: 1 / Details: A/Shanghai/1/2013 H7 HA1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Influenza A virus
Molecular weightTheoretical: 34.58293 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DKICLGHHAV SNGTKVNTLT ERGVEVVNAT ETVERTNIPR ICSKGKRTVD LGQCGLLGTI TGPPQCDQFL EFSADLIIER REGSDVCFP GKFVNEEALR QILRESGGID KEAMGFTYSG IRTNGATSSC RRSGSSFYAE MKWLLSNTDN AAFPQMTKSY K NTRKNPAL ...String:
DKICLGHHAV SNGTKVNTLT ERGVEVVNAT ETVERTNIPR ICSKGKRTVD LGQCGLLGTI TGPPQCDQFL EFSADLIIER REGSDVCFP GKFVNEEALR QILRESGGID KEAMGFTYSG IRTNGATSSC RRSGSSFYAE MKWLLSNTDN AAFPQMTKSY K NTRKNPAL IVWGIHHSGS TAEQTKLYGS GNKLVTVGSS NYQQSFVPSP GARTQVNGQS GRIDFHWLML NPNDTVTFSF NG AFIAPDR ASFLRGKSMG IQSGVQVDAD CEGDCYYSGG TIISNLPFQN IDSRAVGKCP RYVKQRSLLL ATGMKNVPEI

UniProtKB: Hemagglutinin

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Macromolecule #2: Hemagglutinin HA2 chain

MacromoleculeName: Hemagglutinin HA2 chain / type: protein_or_peptide / ID: 2 / Details: A/Shanghai/1/2013 H7 HA2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Influenza A virus
Molecular weightTheoretical: 26.598201 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: PKGRGLFGAI AGFIENGWEG LIDGWYGFRH QNAQGEGTAA DYKSTQSAID QITGKLNRLI EKTNQQFELI DNEFTEVEKQ IGNVINWTR DSITEVWSYN AELLVAMENQ HTIDLADSEM DKLYERVKRQ LRENAEEDGT GCFEIFHKCD DDCMASIRNN T YDHSKYRE ...String:
PKGRGLFGAI AGFIENGWEG LIDGWYGFRH QNAQGEGTAA DYKSTQSAID QITGKLNRLI EKTNQQFELI DNEFTEVEKQ IGNVINWTR DSITEVWSYN AELLVAMENQ HTIDLADSEM DKLYERVKRQ LRENAEEDGT GCFEIFHKCD DDCMASIRNN T YDHSKYRE EAMQNRIQID GSGYIPEAPR DGQAYVRKDG EWVLLSTFLG SGLNDIFEAQ KIEWHEGHHH HHH

UniProtKB: Hemagglutinin

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Macromolecule #3: H7D28 pFab HC Fv_polyA

MacromoleculeName: H7D28 pFab HC Fv_polyA / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 10.741231 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)

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Macromolecule #4: H7D28 pFab LC Fv_polyA

MacromoleculeName: H7D28 pFab LC Fv_polyA / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 9.209344 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)

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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: 9 / 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

Concentration0.7 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormula
50.0 nMTris
100.0 nMNaClSodium chloride
0.1 %Octyl-beta-Glucoside
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS GLACIOS
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 1.5 µm / Nominal defocus min: 0.7000000000000001 µm
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2

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Image processing

Startup modelType of model: INSILICO MODEL / Details: CryoSPARC Ab-initio
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.0) / Number images used: 183753
FSC plot (resolution estimation)

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