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- EMDB-23795: Negative stain map of monoclonal Fab SFV019 2A06 binding the late... -

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Basic information

Entry
Database: EMDB / ID: EMD-23795
TitleNegative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA
Map dataNegative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA
Sample
  • Complex: Negative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA (A/California/4/2009 E47K)
Function / homology
Function and homology information


viral budding from plasma membrane / clathrin-dependent endocytosis of virus by host cell / host cell surface receptor binding / apical plasma membrane / 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
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 speciesHomo sapiens (human)
Methodsingle particle reconstruction / negative staining / Resolution: 25.0 Å
AuthorsHan J / Ward AB
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)75N93019C00051 United States
CitationJournal: Sci Transl Med / Year: 2021
Title: First exposure to the pandemic H1N1 virus induced broadly neutralizing antibodies targeting hemagglutinin head epitopes.
Authors: Jenna J Guthmiller / Julianna Han / Lei Li / Alec W Freyn / Sean T H Liu / Olivia Stovicek / Christopher T Stamper / Haley L Dugan / Micah E Tepora / Henry A Utset / Dalia J Bitar / Natalie ...Authors: Jenna J Guthmiller / Julianna Han / Lei Li / Alec W Freyn / Sean T H Liu / Olivia Stovicek / Christopher T Stamper / Haley L Dugan / Micah E Tepora / Henry A Utset / Dalia J Bitar / Natalie J Hamel / Siriruk Changrob / Nai-Ying Zheng / Min Huang / Florian Krammer / Raffael Nachbagauer / Peter Palese / Andrew B Ward / Patrick C Wilson /
Abstract: Broadly neutralizing antibodies are critical for protection against both drifted and shifted influenza viruses. Here, we reveal that first exposure to the 2009 pandemic H1N1 influenza virus recalls ...Broadly neutralizing antibodies are critical for protection against both drifted and shifted influenza viruses. Here, we reveal that first exposure to the 2009 pandemic H1N1 influenza virus recalls memory B cells that are specific to the conserved receptor-binding site (RBS) or lateral patch epitopes of the hemagglutinin (HA) head domain. Monoclonal antibodies (mAbs) generated against these epitopes are broadly neutralizing against H1N1 viruses spanning 40 years of viral evolution and provide potent protection in vivo. Lateral patch-targeting antibodies demonstrated near universal binding to H1 viruses, and RBS-binding antibodies commonly cross-reacted with H3N2 viruses and influenza B viruses. Lateral patch-targeting mAbs were restricted to expressing the variable heavy-chain gene VH3-23 with or without the variable kappa-chain gene VK1-33 and often had a Y-x-R motif within the heavy-chain complementarity determining region 3 to make key contacts with HA. Moreover, lateral patch antibodies that used both VH3-23 and VK1-33 maintained neutralizing capability with recent pH1N1 strains that acquired mutations near the lateral patch. RBS-binding mAbs used a diverse repertoire but targeted the RBS epitope similarly and made extensive contacts with the major antigenic site Sb. Together, our data indicate that RBS- and lateral patch-targeting clones are abundant within the human memory B cell pool, and universal vaccine strategies should aim to drive antibodies against both conserved head and stalk epitopes.
History
DepositionApr 6, 2021-
Header (metadata) releaseJul 28, 2021-
Map releaseJul 28, 2021-
UpdateJul 28, 2021-
Current statusJul 28, 2021Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.02
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.02
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23795.png

Downloads & links

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Map

FileDownload / File: emd_23795.map.gz / Format: CCP4 / Size: 15.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationNegative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.98 Å/pix.
x 160 pix.
= 316.8 Å		1.98 Å/pix.
x 160 pix.
= 316.8 Å		1.98 Å/pix.
x 160 pix.
= 316.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.98 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.02 / Movie #1: 0.02
Minimum - Maximum-0.03957701 - 0.08099386
Average (Standard dev.)0.00036664752 (±0.0051792585)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions160160160
Spacing160160160
CellA=B=C: 316.8 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.981.981.98
M x/y/z160160160
origin x/y/z0.0000.0000.000
length x/y/z316.800316.800316.800
α/β/γ90.00090.00090.000
start NX/NY/NZ1331310
NX/NY/NZ223226424
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS160160160
D min/max/mean-0.0400.0810.000

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Supplemental data

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Sample components

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Entire : Negative stain map of monoclonal Fab SFV019 2A06 binding the late...

EntireName: Negative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA (A/California/4/2009 E47K)
Components
  • Complex: Negative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA (A/California/4/2009 E47K)

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Supramolecule #1: Negative stain map of monoclonal Fab SFV019 2A06 binding the late...

SupramoleculeName: Negative stain map of monoclonal Fab SFV019 2A06 binding the lateral patch of H1 HA (A/California/4/2009 E47K)
type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Homo sapiens (human) / Recombinant cell: 293F

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Experimental details

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Structure determination

Methodnegative staining
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
StainingType: NEGATIVE / Material: uranyl formate
GridModel: Homemade / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: CONTINUOUS

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Image recordingFilm or detector model: FEI CETA (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

4m4y

Final reconstructionResolution.type: BY AUTHOR / Resolution: 25.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: RELION (ver. 2.1) / Number images used: 5000
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION

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