6D0U

Crystal structure of C05 V110P/A117E mutant bound to H3 influenza hemagglutinin, HA1 subunit

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.254 

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Literature

Multistate design of influenza antibodies improves affinity and breadth against seasonal viruses.

Sevy, A.M., Wu, N.C., Gilchuk, I.M., Parrish, E.H., Burger, S., Yousif, D., Nagel, M.B.M., Schey, K.L., Wilson, I.A., Crowe Jr., J.E., Meiler, J.

(2019) Proc Natl Acad Sci U S A 116: 1597-1602

  • DOI: 10.1073/pnas.1806004116
  • Primary Citation of Related Structures:  
    6D0U

  • PubMed Abstract: 

    • Influenza is a yearly threat to global public health. Rapid changes in influenza surface proteins resulting from antigenic drift and shift events make it difficult to readily identify antibodies with broadly neutralizing activity against different influenza subtypes with high frequency, specifically antibodies targeting the receptor binding domain (RBD) on influenza HA protein ...

    Influenza is a yearly threat to global public health. Rapid changes in influenza surface proteins resulting from antigenic drift and shift events make it difficult to readily identify antibodies with broadly neutralizing activity against different influenza subtypes with high frequency, specifically antibodies targeting the receptor binding domain (RBD) on influenza HA protein. We developed an optimized computational design method that is able to optimize an antibody for recognition of large panels of antigens. To demonstrate the utility of this multistate design method, we used it to redesign an antiinfluenza antibody against a large panel of more than 500 seasonal HA antigens of the H1 subtype. As a proof of concept, we tested this method on a variety of known antiinfluenza antibodies and identified those that could be improved computationally. We generated redesigned variants of antibody C05 to the HA RBD and experimentally characterized variants that exhibited improved breadth and affinity against our panel. C05 mutants exhibited improved affinity for three of the subtypes used in design by stabilizing the CDRH3 loop and creating favorable electrostatic interactions with the antigen. These mutants possess increased breadth and affinity of binding while maintaining high-affinity binding to existing targets, surpassing a major limitation up to this point.

    Organizational Affiliation: 

    Department of Chemistry, Vanderbilt University, Nashville, TN 37235.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HemagglutininA,
D [auth B],
L [auth G],
G [auth J]		274Influenza A virus (A/Hong Kong/1/1968(H3N2))Mutation(s): 0 
Gene Names: HA
UniProt
Find proteins for Q91MA7 (Influenza A virus (strain A/Hong Kong/1/1968 H3N2))
Explore Q91MA7 
Go to UniProtKB:  Q91MA7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ91MA7
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Antibody C05 V110P/A117E mutant, heavy chainE [auth C],
B [auth E],
J [auth H],
H [auth K]		247Homo sapiensMutation(s): 0 
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Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Antibody C05, light chainF [auth D],
C [auth F],
K [auth I],
I [auth L]		214Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG
Download Ideal Coordinates CCD File 
M [auth J],
N [auth G]		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: 3.25 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.254 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.605α = 90
b = 258.422β = 90.54
c = 91.876γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Deposited Date: 2018-04-11 
  • Released Date: 2019-01-16 
    • 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 StatesU19 AI117905

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-16
    Type: Initial release
  • Version 1.1: 2019-01-30
    Changes: Data collection, Database references
  • Version 1.2: 2019-02-06
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence
  • Version 1.4: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary