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- PDB-9w44: Structure of hemagglutinin from Asiatic toad influenza-like virus... -

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Basic information

Entry
Database: PDB / ID: 9w44
TitleStructure of hemagglutinin from Asiatic toad influenza-like virus complexed with avian receptor analog LSTa
ComponentsHemagglutinin
KeywordsVIRAL PROTEIN / Hemagglutinin
Function / homology
Function and homology information


host cell surface receptor binding / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / viral envelope / membrane
Similarity search - Function
Haemagglutinin, influenzavirus B / Haemagglutinin / Haemagglutinin, influenzavirus A/B
Similarity search - Domain/homology
3'-sialyl-N-acetyllactosamine / Hemagglutinin
Similarity search - Component
Biological speciesWuhan asiatic toad influenza virus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.37 Å
AuthorsZhang, D. / Xie, Y.F.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: To Be Published
Title: Structure of hemagglutinin from Asiatic toad influenza-like virus
Authors: Zhang, D. / Xie, Y.F.
History
DepositionJul 30, 2025Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Nov 12, 2025Provider: repository / Type: Initial release
Revision 1.0Nov 12, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Nov 12, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Nov 12, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Nov 12, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Nov 12, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

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


Theoretical massNumber of molelcules
Total (without water)174,02524
Polymers164,8553
Non-polymers9,17021
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: 54951.590 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Wuhan asiatic toad influenza virus / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: A0A2P1GNQ1
#2: Polysaccharide N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide, Oligosaccharide / Class: Substrate analog / Mass: 674.604 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: 3'-sialyl-N-acetyllactosamine
DescriptorTypeProgram
DNeup5Aca2-3DGalpb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,3,2/[a2122h-1b_1-5_2*NCC/3=O][a2112h-1b_1-5][Aad21122h-2a_2-6_5*NCC/3=O]/1-2-3/a4-b1_b3-c2WURCSPDB2Glycan 1.1.0
[][b-D-GlcpNAc]{[(4+1)][b-D-Galp]{[(3+2)][a-D-Neup5Ac]{}}}LINUCSPDB-CARE
#3: Polysaccharide beta-D-mannopyranose-(1-2)-beta-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-6)-beta-D- ...beta-D-mannopyranose-(1-2)-beta-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1072.964 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-2DManpb1-3DManpb1-6DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2-2-2-2/a4-b1_b4-c1_c6-d1_d3-e1_e2-f1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(6+1)][b-D-Manp]{[(3+1)][b-D-Manp]{[(2+1)][b-D-Manp]{}}}}}}}LINUCSPDB-CARE
#4: 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.: 3
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam 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
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#5: 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.: 12 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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: Toad Hemagglutinin / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Wuhan asiatic toad influenza 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: TFS 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

EM software
IDNameCategory
1Topazparticle selection
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.37 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 119048 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00311877
ELECTRON MICROSCOPYf_angle_d0.49516083
ELECTRON MICROSCOPYf_dihedral_angle_d4.6251848
ELECTRON MICROSCOPYf_chiral_restr0.0421929
ELECTRON MICROSCOPYf_plane_restr0.0032010

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