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- PDB-8xr9: Dual receptor-binding, infectivity, and transmissibility of an em... -

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Basic information

Entry
Database: PDB / ID: 8xr9
TitleDual receptor-binding, infectivity, and transmissibility of an emerging H2N2 avian influenza virus
ComponentsHemagglutinin
KeywordsVIRAL PROTEIN / H2N2 / influenza virus / receptor / replication / transmission / mice / guinea pig / ferret / mutation / public health risk / VIRUS
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
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.6 Å
AuthorsSun, J. / Zheng, T.Y.
Funding support China, 2items
OrganizationGrant numberCountry
Chinese Academy of Sciences151C53KYSB20210023 China
Chinese Academy of SciencesYSBR-086 China
CitationJournal: Nat Commun / Year: 2024
Title: Dual receptor-binding, infectivity, and transmissibility of an emerging H2N2 low pathogenicity avian influenza virus.
Authors: Ju Sun / Tianyi Zheng / Mingjun Jia / Yanjun Wang / Jingru Yang / Yun Liu / Pengyun Yang / Yufeng Xie / Honglei Sun / Qi Tong / Jiaming Li / Jing Yang / Guanghua Fu / Yi Shi / Jianxun Qi / ...Authors: Ju Sun / Tianyi Zheng / Mingjun Jia / Yanjun Wang / Jingru Yang / Yun Liu / Pengyun Yang / Yufeng Xie / Honglei Sun / Qi Tong / Jiaming Li / Jing Yang / Guanghua Fu / Yi Shi / Jianxun Qi / Wenjun Liu / Jinhua Liu / Wen-Xia Tian / George F Gao / Yuhai Bi /
Abstract: The 1957 H2N2 influenza pandemic virus [A(H2N2)pdm1957] has disappeared from humans since 1968, while H2N2 avian influenza viruses (AIVs) are still circulating in birds. It is necessary to reveal the ...The 1957 H2N2 influenza pandemic virus [A(H2N2)pdm1957] has disappeared from humans since 1968, while H2N2 avian influenza viruses (AIVs) are still circulating in birds. It is necessary to reveal the recurrence risk and potential cross-species infection of these AIVs from avian to mammals. We find that H2 AIVs circulating in domestic poultry in China have genetic and antigenic differences compared to the A(H2N2)pdm1957. One H2N2 AIV has a dual receptor-binding property similar to that of the A(H2N2)pdm1957. Molecular and structural studies reveal that the N144S, and N144E or R137M substitutions in hemagglutinin (HA) enable H2N2 avian or human viruses to bind or preferentially bind human-type receptor. The H2N2 AIV rapidly adapts to mice (female) and acquires mammalian-adapted mutations that facilitated transmission in guinea pigs and ferrets (female). These findings on the receptor-binding, infectivity, transmission, and mammalian-adaptation characteristics of H2N2 AIVs provide a reference for early-warning and prevention for this subtype.
History
DepositionJan 6, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 15, 2025Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
C: Hemagglutinin
A: Hemagglutinin
B: Hemagglutinin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)173,59417
Polymers168,6513
Non-polymers4,94414
Water00
1


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

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Components

#1: Protein Hemagglutinin


Mass: 56216.934 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Influenza A virus / Gene: HA / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q67333
#2: Polysaccharide N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D- ...N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-3)-beta-D-galactopyranose


Type: oligosaccharide / Mass: 836.744 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DNeup5Aca2-6DGalpb1-4DGlcpNAcb1-3DGalpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,4,3/[a2112h-1b_1-5][a2122h-1b_1-5_2*NCC/3=O][Aad21122h-2a_2-6_5*NCC/3=O]/1-2-1-3/a3-b1_b4-c1_c6-d2WURCSPDB2Glycan 1.1.0
[][b-D-Galp]{[(3+1)][b-D-GlcpNAc]{[(4+1)][b-D-Galp]{[(6+2)][a-D-Neup5Ac]{}}}}LINUCSPDB-CARE
#3: 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.: 11 / 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
Has ligand of interestY
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: The structure of influenza H2 human Singapore N144E hemagglutinin with human receptor
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Influenza A virus
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 507334 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00312264
ELECTRON MICROSCOPYf_angle_d0.52116599
ELECTRON MICROSCOPYf_dihedral_angle_d4.2111718
ELECTRON MICROSCOPYf_chiral_restr0.0421844
ELECTRON MICROSCOPYf_plane_restr0.0052122

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