6NSF

Crystal structure of the A/Brisbane/10/2007 (H3N2) influenza virus hemagglutinin G186V/L194P mutant in complex with 3'-SLNLN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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This is version 2.0 of the entry. See complete history


Literature

Preventing an Antigenically Disruptive Mutation in Egg-Based H3N2 Seasonal Influenza Vaccines by Mutational Incompatibility.

Wu, N.C.Lv, H.Thompson, A.J.Wu, D.C.Ng, W.W.S.Kadam, R.U.Lin, C.W.Nycholat, C.M.McBride, R.Liang, W.Paulson, J.C.Mok, C.K.P.Wilson, I.A.

(2019) Cell Host Microbe 25: 836

  • DOI: 10.1016/j.chom.2019.04.013
  • Primary Citation of Related Structures:  
    6NS9, 6NSA, 6NSB, 6NSC, 6NSF, 6NSG

  • PubMed Abstract: 
  • Egg-based seasonal influenza vaccines are the major preventive countermeasure against influenza virus. However, their effectiveness can be compromised when antigenic changes arise from egg-adaptive mutations on influenza hemagglutinin (HA). The L194P mutation is commonly observed in egg-based H3N2 vaccine seed strains and significantly alters HA antigenicity ...

    Egg-based seasonal influenza vaccines are the major preventive countermeasure against influenza virus. However, their effectiveness can be compromised when antigenic changes arise from egg-adaptive mutations on influenza hemagglutinin (HA). The L194P mutation is commonly observed in egg-based H3N2 vaccine seed strains and significantly alters HA antigenicity. An approach to prevent L194P would therefore be beneficial. We show that emergence of L194P during egg passaging can be impeded by preexistence of a G186V mutation, revealing strong incompatibility between these mutations. X-ray structures illustrate that individual G186V and L194P mutations have opposing effects on the HA receptor-binding site (RBS), and when both G186V and L194P are present, the RBS is severely disrupted. Importantly, wild-type HA antigenicity is maintained with G186V, but not L194P. Our results demonstrate that these epistatic interactions can be used to prevent the emergence of mutations that adversely alter antigenicity during egg adaptation.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, CA 92037, USA; The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA. Electronic address: wilson@scripps.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA1 chainA321Influenza A virus (A/Brisbane/10/2007(H3N2))Mutation(s): 1 
Gene Names: HA
UniProt
Find proteins for A8W8K8 (Influenza A virus)
Explore A8W8K8 
Go to UniProtKB:  A8W8K8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8W8K8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemagglutinin HA2 chainB176Influenza A virus (A/Brisbane/10/2007(H3N2))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for A8W891 (Influenza A virus)
Explore A8W891 
Go to UniProtKB:  A8W891
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8W891
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseC 5N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G22768VO
GlyCosmos:  G22768VO
GlyGen:  G22768VO
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseD 3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G28454KX
GlyCosmos:  G28454KX
GlyGen:  G28454KX
Entity ID: 5
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseE 3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 6
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseF 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SIA
Query on SIA

Download Ideal Coordinates CCD File 
I [auth A]N-acetyl-alpha-neuraminic acid
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N
 Ligand Interaction
NAG
Query on NAG

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
J [auth B]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.174α = 90
b = 100.174β = 90
c = 382.752γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PHASERphasing
HKL-2000data reduction

Structure Validation

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Ligand Structure Quality Assessment 



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-01-24 
  • Released Date: 2019-04-24 
  • Deposition Author(s): Wu, N.C., Wilson, I.A.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR56 AI127371

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-24
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-26
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence, Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary