6XQ0

Human antibody S8V2-18 in complex with the influenza hemagglutinin head domain of A/California/7/2009(NYMC-X181)(H1N1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 

Starting Models: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Prevalent Focused Human Antibody Response to the Influenza Virus Hemagglutinin Head Interface.

McCarthy, K.R.Lee, J.Watanabe, A.Kuraoka, M.Robinson-McCarthy, L.R.Georgiou, G.Kelsoe, G.Harrison, S.C.

(2021) mBio 12: e0114421-e0114421

  • DOI: https://doi.org/10.1128/mBio.01144-21
  • Primary Citation of Related Structures:  
    6XPO, 6XPQ, 6XPR, 6XPX, 6XPY, 6XPZ, 6XQ0, 6XQ2, 6XQ4

  • PubMed Abstract: 

    Novel animal influenza viruses emerge, initiate pandemics, and become endemic seasonal variants that have evolved to escape from prevalent herd immunity. These processes often outpace vaccine-elicited protection. Focusing immune responses on conserved epitopes may impart durable immunity. We describe a focused, protective antibody response, abundant in memory and serum repertoires, to a conserved region at the influenza virus hemagglutinin (HA) head interface. Structures of 11 examples, 8 reported here, from seven human donors demonstrate the convergence of responses on a single epitope. The 11 are genetically diverse, with one class having a common, IGκV1-39, light chain. All of the antibodies bind HAs from multiple serotypes. The lack of apparent genetic restriction and potential for elicitation by more than one serotype may explain their abundance. We define the head interface as a major target of broadly protective antibodies with the potential to influence the outcomes of influenza virus infection. IMPORTANCE The rapid appearance of mutations in circulating human influenza viruses and selection for escape from herd immunity require prediction of likely variants for an annual updating of influenza vaccines. The identification of human antibodies that recognize conserved surfaces on the influenza virus hemagglutinin (HA) has prompted efforts to design immunogens that might selectively elicit such antibodies. The recent discovery of a widely prevalent antibody response to the conserved interface between two HA "heads" (the globular, receptor-binding domains at the apex of the spike-like trimer) has added a new target for these efforts. We report structures of eight such antibodies, bound with HA heads, and compare them with each other and with three others previously described. Although genetically diverse, they all converge on a common binding site. The analysis here can guide immunogen design for preclinical trials.


  • Organizational Affiliation

    Laboratory of Molecular Medicine, Boston Children's Hospital, Boston, Massachusetts, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HemagglutininA [auth D],
B [auth A]
225Influenza A virus (A/reassortant/NYMC X-181A(A/NYMC X-157 x California/07/2009)(H1N1))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for I6T519 (Influenza A virus)
Explore I6T519 
Go to UniProtKB:  I6T519
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupI6T519
Glycosylation
Glycosylation Sites: 1
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
antibody S8V2-18 light chain
C, F
215Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
antibody S8V2-18 heavy chainD [auth B],
E
240Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)][alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
G, H
5N-Glycosylation
Glycosylation Resources
GlyTouCan:  G92953ND
GlyCosmos:  G92953ND
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
I [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.224 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.2α = 90
b = 55.26β = 95.02
c = 168γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI089618
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI117892

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-19
    Type: Initial release
  • Version 1.1: 2021-07-28
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Database references, Refinement description