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- PDB-9bu6: Vaccine elicited Fab C968.180 with influenza H10 JD13 HA trimer -

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Basic information

Entry
Database: PDB / ID: 9bu6
TitleVaccine elicited Fab C968.180 with influenza H10 JD13 HA trimer
Components
  • (Fab C968.180 ...) x 2
  • (Hemagglutinin ...) x 2
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM / Vaccine / VIRAL PROTEIN-IMMUNE SYSTEM complex / IMMUNE SYSTEM
Function / homology
Function and homology information


viral budding from plasma membrane / clathrin-dependent endocytosis of virus by host cell / host cell surface receptor binding / 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 / 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 speciesHomo sapiens (human)
Influenza A virus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.65 Å
AuthorsGorman, J. / Kwong, P.D.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM103310 United States
Simons FoundationSF349247 United States
CitationJournal: Sci Transl Med / Year: 2025
Title: Vaccination with different group 2 influenza subtypes alters epitope targeting and breadth of hemagglutinin stem-specific human B cells.
Authors: Grace E Mantus / Ankita J Chopde / Jason Gorman / Lauren Y Cominsky / Amine Ourahmane / Adrian Creanga / Geoffrey D Shimberg / Rebecca A Gillespie / David J Van Wazer / Tongqing Zhou / ...Authors: Grace E Mantus / Ankita J Chopde / Jason Gorman / Lauren Y Cominsky / Amine Ourahmane / Adrian Creanga / Geoffrey D Shimberg / Rebecca A Gillespie / David J Van Wazer / Tongqing Zhou / Suprabhath R Gajjala / Connor Williams / Emma Maestle / Douglas S Reed / Leonid Serebryannyy / Pamela Costner / Lasonji Holman / Joseph P Casazza / Richard A Koup / Lesia K Dropulic / Peter D Kwong / Adrian B McDermott / Masaru Kanekiyo / Sarah F Andrews /
Abstract: The conserved influenza hemagglutinin stem, which is a target of cross-neutralizing antibodies, is now used in vaccine strategies focused on protecting against influenza pandemics. Antibody responses ...The conserved influenza hemagglutinin stem, which is a target of cross-neutralizing antibodies, is now used in vaccine strategies focused on protecting against influenza pandemics. Antibody responses to group 1 stem have been extensively characterized, but little is known about group 2. Here, we characterized the stem-specific repertoire of individuals vaccinated with one of three group 2 influenza subtypes (H3, H7, or H10). Epitope mapping revealed two epitope supersites on the group 2 stem. Antibodies targeting the central epitope were broadly cross-reactive, whereas antibodies targeting the lower epitope had narrower breadth but higher potency against H3 subtypes. The ratio of B cells targeting each of the supersites varied with the vaccine subtype, leading to differences in the cross-reactivity of the B cell response. Our findings suggest that vaccine strategies targeting both group 2 stem epitopes would be complementary, eliciting broader and more potent protection against both seasonal and pandemic influenza strains.
History
DepositionMay 16, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 27, 2024Provider: repository / Type: Initial release
Revision 1.1Jan 22, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_volume / _citation.page_first ..._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

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Fab C968.180 heavy chain
B: Fab C968.180 light chain
C: Hemagglutinin HA1
D: Hemagglutinin HA2
E: Fab C968.180 heavy chain
F: Fab C968.180 light chain
G: Hemagglutinin HA1
H: Hemagglutinin HA2
I: Fab C968.180 heavy chain
J: Fab C968.180 light chain
K: Hemagglutinin HA1
L: Hemagglutinin HA2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)269,92824
Polymers264,95812
Non-polymers4,97012
Water00
1


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

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Components

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Hemagglutinin ... , 2 types, 6 molecules CGKDHL

#3: Protein Hemagglutinin HA1


Mass: 35569.184 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Influenza A virus / Gene: HA / Production host: Homo sapiens (human) / References: UniProt: A0A059T4A1
#4: Protein Hemagglutinin HA2


Mass: 26338.871 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Influenza A virus / Gene: HA / Production host: Homo sapiens (human) / References: UniProt: A0A0B4UV34

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Antibody , 2 types, 6 molecules AEIBFJ

#1: Antibody Fab C968.180 heavy chain


Mass: 14611.216 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)
#2: Antibody Fab C968.180 light chain


Mass: 11800.118 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Homo sapiens (human)

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Sugars , 3 types, 12 molecules

#5: 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.: 6
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
#6: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}LINUCSPDB-CARE
#7: 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.: 3 / 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
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

ComponentName: Vaccine elicited Fab C968.180 with influenza H10 JD13 HA trimer
Type: COMPLEX / Entity ID: #1-#4 / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Influenza A virus
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4 / Details: PBS
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: C-flat-1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 90 % / Chamber temperature: 293 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm / C2 aperture diameter: 70 µm
Image recordingAverage exposure time: 2 sec. / Electron dose: 52.15 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6067

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Processing

EM softwareName: PHENIX / Version: dev_5278 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.65 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 81468 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingSource name: AlphaFold / Type: in silico model
RefinementCross valid method: NONE

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