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- EMDB-48613: Structure of porcine Fab 24-1G23 in complex with influenza H1N1 A... -

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Basic information

Entry
Database: EMDB / ID: EMD-48613
TitleStructure of porcine Fab 24-1G23 in complex with influenza H1N1 A/Hawaii/70/2019 hemagglutinin
Map data
Sample
  • Complex: A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 24-1G17
    • Protein or peptide: Hemagglutinin
    • Protein or peptide: Heavy chain of Fab from porcine antibody 24-1G23
  • Protein or peptide: Light chain of Fab from porcine antibody 24-1G23
  • Protein or peptide: Hemagglutinin
KeywordsInfluenza / Hemagglutinin / Antibody / Immune response / Pig / VIRAL PROTEIN-IMMUNE SYSTEM complex
Function / homology
Function and homology information


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 / 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
Hemagglutinin / Hemagglutinin
Similarity search - Component
Biological speciesHomo sapiens (human) / Influenza A virus / Sus scrofa (pig)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.41 Å
AuthorsLv H / Pholcharee T / Wu NC
Funding support United States, 1 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI)Emerging Pathogens Initiative United States
CitationJournal: To Be Published
Title: Structural analysis of broadly neutralizing porcine antibodies to influenza hemagglutinin stem
Authors: Lv H / Pholcharee T / Wu NC
History
DepositionJan 11, 2025-
Header (metadata) releaseSep 24, 2025-
Map releaseSep 24, 2025-
UpdateSep 24, 2025-
Current statusSep 24, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

Downloads & links

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Map

FileDownload / File: emd_48613.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 360 pix.
= 380.88 Å
1.06 Å/pix.
x 360 pix.
= 380.88 Å
1.06 Å/pix.
x 360 pix.
= 380.88 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.058 Å
Density
Contour LevelBy AUTHOR: 0.04
Minimum - Maximum-0.001788739 - 1.4716309
Average (Standard dev.)0.0006456784 (±0.01792515)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 380.87997 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_48613_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: #1

Fileemd_48613_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire : A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 2...

EntireName: A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 24-1G17
Components
  • Complex: A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 24-1G17
    • Protein or peptide: Hemagglutinin
    • Protein or peptide: Heavy chain of Fab from porcine antibody 24-1G23
  • Protein or peptide: Light chain of Fab from porcine antibody 24-1G23
  • Protein or peptide: Hemagglutinin

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Supramolecule #1: A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 2...

SupramoleculeName: A complex of hemagglutinin from A A/Hawaii/70/2019 with pig Fab 24-1G17
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Details: Hemagglutinin was expressed recombinantly in SF9 cells. Fab 24-1G17 was expressed recombinantly in Expi293F cells.
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 76.19 KDa

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Macromolecule #1: Hemagglutinin

MacromoleculeName: Hemagglutinin / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Influenza A virus
Molecular weightTheoretical: 36.484098 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DTLCIGYHAN NSTDTVDTVL EKNVTVTHSV NLLEDKHNGK LCKLRGVAPL HLGKCNIAGW ILGNPECESL STARSWSYIV ETSNSDNGT CYPGDFINYE ELREQLSSVS SFERFEIFPK TSSWPNHDSD KGVTAACPHA GAKSFYKNLI WLVKKGNSYP K LNQTYIND ...String:
DTLCIGYHAN NSTDTVDTVL EKNVTVTHSV NLLEDKHNGK LCKLRGVAPL HLGKCNIAGW ILGNPECESL STARSWSYIV ETSNSDNGT CYPGDFINYE ELREQLSSVS SFERFEIFPK TSSWPNHDSD KGVTAACPHA GAKSFYKNLI WLVKKGNSYP K LNQTYIND KGKEVLVLWG IHHPPTIAAQ ESLYQNADAY VFVGTSRYSK KFKPEIATRP KVRDQEGRMN YYWTLVEPGD KI TFEATGN LVVPRYAFTM ERDAGSGIII SDTPVHDCNT TCQTPEGAIN TSLPFQNVHP ITIGKCPKYV KSTKLRLATG LRN VPSIQS R

UniProtKB: Hemagglutinin

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Macromolecule #2: Heavy chain of Fab from porcine antibody 24-1G23

MacromoleculeName: Heavy chain of Fab from porcine antibody 24-1G23 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Sus scrofa (pig)
Molecular weightTheoretical: 13.840352 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
EEKLVESGGG LVQPGGSLRL SCVGSGFTFS STYIGWVRQA PGGGLEWLGS ISVNGDITDY AESAEGRFTI SKDNSQNMAW LQMNSLRTE DTARYYCATG RFFGIVVTYA MNLWGPGVEV VVSSASTKGP S

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Macromolecule #3: Light chain of Fab from porcine antibody 24-1G23

MacromoleculeName: Light chain of Fab from porcine antibody 24-1G23 / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Sus scrofa (pig)
Molecular weightTheoretical: 12.289744 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString:
QTVIQEPAMS VSPGGTVTLT CAFRSGSVTT SNYPSWFQQT PGQPPRLLIY NTNSRPTGVP SRFSGRISGN KAALTITGAQ TEDEADYFC ALYKTALNVR FGGGTHLTVL GQPKAAP

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Macromolecule #4: Hemagglutinin

MacromoleculeName: Hemagglutinin / type: protein_or_peptide / ID: 4 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Influenza A virus
Molecular weightTheoretical: 20.004217 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
GLFGAIAGFI EGGWTGMVDG WYGYHHQNEQ GSGYAADLKS TQNAIDKITN KVNSVIEKMN TQFTAVGKEF NHLEKRIENL NKKVDDGFL DIWTYNAELL VLLENERTLD YHDSNVKNLY EKVRNQLKNN AKEIGNGCFE FYHKCDNTCM ESVKNGTYDY P KYSEEAKL NREKID

UniProtKB: Hemagglutinin

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration3 mg/mL
BufferpH: 8 / Details: 20 mM Tris-HCl, 100 mM NaCl
VitrificationCryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK III
DetailsThe sample was also mixed with octyl glucoside to 0.1% w/v of the detergent final concentration piror to applying on the grid.

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 57.35 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: OTHER
Details: Initial model was built directly into the map using automated model building algorithm ModelAngelo (DOI: 10.1038/s41586-024-07215-4)
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.41 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.5) / Number images used: 247438
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.5)

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