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- PDB-9ei9: Cryo-EM structure of 5E10 Fab in complex with H3 influenza Victor... -

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Basic information

Entry
Database: PDB / ID: 9ei9
TitleCryo-EM structure of 5E10 Fab in complex with H3 influenza Victoria 2011 HA trimer
Components
  • (Hemagglutinin ...) x 2
  • 5E10 Fab Heavy chain
  • 5E10 Fab Light chain
KeywordsIMMUNE SYSTEM / HA / influenza / flu / N-term / H3
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
Biological speciesInfluenza A virus
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.89 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: Structure / Year: 2025
Title: The N terminus of H3-influenza hemagglutinin as a site-of-vulnerability to neutralizing antibody.
Authors: Reda Rawi / Nicholas C Morano / Crystal Sao-Fong Cheung / Haijuan Du / Jason Gorman / Madhu Prabhakaran / Jordan E Becker / Tatsiana Bylund / Sam Charaf / Xuejun Chen / Myungjin Lee / Darcy ...Authors: Reda Rawi / Nicholas C Morano / Crystal Sao-Fong Cheung / Haijuan Du / Jason Gorman / Madhu Prabhakaran / Jordan E Becker / Tatsiana Bylund / Sam Charaf / Xuejun Chen / Myungjin Lee / Darcy R Harris / Adam S Olia / Li Ou / Lingshu Wang / Shuishu Wang / Baoshan Zhang / Masaru Kanekiyo / Adrian B McDermott / Tongqing Zhou / Lawrence Shapiro / Peter D Kwong /
Abstract: The N terminus of the H3 subtype of influenza virus hemagglutinin is ∼10 residues longer than the N termini of most other hemagglutinins. As conserved, exposed, and linear regions may be good ...The N terminus of the H3 subtype of influenza virus hemagglutinin is ∼10 residues longer than the N termini of most other hemagglutinins. As conserved, exposed, and linear regions may be good vaccine targets, we investigated the vaccine utility of the extended H3-N terminus. First, we identified antibody 5E10, for which structure and binding analyses revealed recognition of the H3-N terminus. Second, we immunized mice with immunogens incorporating the H3-N terminus, boosted with hemagglutinin trimer, and isolated antibodies from immunogen-elicited B cells that bound both H3-N terminus and hemagglutinin trimer. However, hemagglutinin-complex structures of two such antibodies, 3864-6 and 3864-10, that neutralized H3-influenza strains, revealed only peripheral recognition of the hemagglutinin N terminus. Collectively, these results reveal the N terminus of H3 hemagglutinin to be a suboptimal vaccine target and suggest that-in addition to being conserved, flexible, and accessible-other factors influence the elicitation of potent broadly neutralizing responses.
History
DepositionNov 25, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 16, 2025Provider: repository / Type: Initial release
Revision 1.1Aug 27, 2025Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed ..._citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _em_admin.last_update
Revision 1.2Nov 19, 2025Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Hemagglutinin HA1
C: Hemagglutinin HA1
E: Hemagglutinin HA2
F: Hemagglutinin HA2
G: Hemagglutinin HA1
I: Hemagglutinin HA2
A: 5E10 Fab Heavy chain
D: 5E10 Fab Light chain
H: 5E10 Fab Heavy chain
J: 5E10 Fab Light chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)246,38137
Polymers238,50010
Non-polymers7,88127
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 BCGEFI

#1: Protein Hemagglutinin HA1


Mass: 37546.414 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: L0HR89
#2: Protein Hemagglutinin HA2


Mass: 25234.092 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: L0HR89

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Antibody , 2 types, 4 molecules AHDJ

#3: Antibody 5E10 Fab Heavy chain


Mass: 13463.039 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)
#4: Antibody 5E10 Fab Light chain


Mass: 11615.999 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Homo sapiens (human)

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Sugars , 3 types, 27 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.: 4
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: obtained synthetically
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.: 20 / 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: 5E10 Fab in complex with H3 influenza Victoria 2011 HA trimer
Type: COMPLEX / Entity ID: #3, #1, #4, #2 / Source: RECOMBINANT
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: TFS 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: 10 sec. / Electron dose: 70.51 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1

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Processing

EM software
IDNameVersionCategory
2Leginonimage acquisition
4cryoSPARC3CTF correction
11cryoSPARC3classification
12cryoSPARC33D reconstruction
13PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.89 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 28277 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingSource name: AlphaFold / Type: in silico model
RefinementHighest resolution: 3.89 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)

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