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- EMDB-42539: Structure of the Measles virus Fusion protein in the post-fusion ... -

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Basic information

Entry
Database: EMDB / ID: EMD-42539
TitleStructure of the Measles virus Fusion protein in the post-fusion conformation
Map dataLocal filtered map
Sample
  • Complex: Structure of the Measles virus Fusion protein in the post-fusion conformation
    • Protein or peptide: Fusion glycoprotein F0
    • Protein or peptide: Fusion glycoprotein F0
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: water
KeywordsVIRAL PROTEIN / glycoprotein / immune system / measles / high-resolution / ectodomain / post-fusion
Function / homologyPrecursor fusion glycoprotein F0, Paramyxoviridae / Fusion glycoprotein F0 / symbiont entry into host cell / fusion of virus membrane with host plasma membrane / viral envelope / host cell plasma membrane / virion membrane / membrane / Fusion glycoprotein F0
Function and homology information
Biological speciesMeasles virus strain Ichinose-B95a
Methodsingle particle reconstruction / cryo EM / Resolution: 2.73 Å
AuthorsZyla D / Saphire EO
Funding support Switzerland, United States, 5 items
OrganizationGrant numberCountry
Swiss National Science FoundationP2EZP3_195680 Switzerland
Swiss National Science FoundationP500PB_210992 Switzerland
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS105699 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS091263 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI176833 United States
CitationJournal: Science / Year: 2024
Title: A neutralizing antibody prevents postfusion transition of measles virus fusion protein.
Authors: Dawid S Zyla / Roberta Della Marca / Gele Niemeyer / Gillian Zipursky / Kyle Stearns / Cameron Leedale / Elizabeth B Sobolik / Heather M Callaway / Chitra Hariharan / Weiwei Peng / Diptiben ...Authors: Dawid S Zyla / Roberta Della Marca / Gele Niemeyer / Gillian Zipursky / Kyle Stearns / Cameron Leedale / Elizabeth B Sobolik / Heather M Callaway / Chitra Hariharan / Weiwei Peng / Diptiben Parekh / Tara C Marcink / Ruben Diaz Avalos / Branka Horvat / Cyrille Mathieu / Joost Snijder / Alexander L Greninger / Kathryn M Hastie / Stefan Niewiesk / Anne Moscona / Matteo Porotto / Erica Ollmann Saphire /
Abstract: Measles virus (MeV) presents a public health threat that is escalating as vaccine coverage in the general population declines and as populations of immunocompromised individuals, who cannot be ...Measles virus (MeV) presents a public health threat that is escalating as vaccine coverage in the general population declines and as populations of immunocompromised individuals, who cannot be vaccinated, increase. There are no approved therapeutics for MeV. Neutralizing antibodies targeting viral fusion are one potential therapeutic approach but have not yet been structurally characterized or advanced to clinical use. We present cryo-electron microscopy (cryo-EM) structures of prefusion F alone [2.1-angstrom (Å) resolution], F complexed with a fusion-inhibitory peptide (2.3-Å resolution), F complexed with the neutralizing and protective monoclonal antibody (mAb) 77 (2.6-Å resolution), and an additional structure of postfusion F (2.7-Å resolution). In vitro assays and examination of additional EM classes show that mAb 77 binds prefusion F, arrests F in an intermediate state, and prevents transition to the postfusion conformation. These structures shed light on antibody-mediated neutralization that involves arrest of fusion proteins in an intermediate state.
History
DepositionOct 31, 2023-
Header (metadata) releaseJul 3, 2024-
Map releaseJul 3, 2024-
UpdateJul 24, 2024-
Current statusJul 24, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42539.png

Downloads & links

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Map

FileDownload / File: emd_42539.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationLocal filtered map
Projections & slices

Image control

Size
Brightness
Contrast
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AxesZ (Sec.)Y (Row.)X (Col.)
0.99 Å/pix.
x 400 pix.
= 396. Å		0.99 Å/pix.
x 400 pix.
= 396. Å		0.99 Å/pix.
x 400 pix.
= 396. Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.99 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.0
Minimum - Maximum-4.8504233 - 6.6297903
Average (Standard dev.)0.001128149 (±0.074618354)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 396.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_42539_msk_1.map
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Additional map: sharpened map

Fileemd_42539_additional_1.map
Annotationsharpened map
Projections & Slices
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Histogram

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Half map: half map 2

Fileemd_42539_half_map_1.map
Annotationhalf map 2
Projections & Slices
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Histogram

Histogram (log scale)

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Half map: half map 1

Fileemd_42539_half_map_2.map
Annotationhalf map 1
Projections & Slices
AxesZYX

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Sample components

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Entire : Structure of the Measles virus Fusion protein in the post-fusion ...

EntireName: Structure of the Measles virus Fusion protein in the post-fusion conformation
Components
  • Complex: Structure of the Measles virus Fusion protein in the post-fusion conformation
    • Protein or peptide: Fusion glycoprotein F0
    • Protein or peptide: Fusion glycoprotein F0
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: water

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Supramolecule #1: Structure of the Measles virus Fusion protein in the post-fusion ...

SupramoleculeName: Structure of the Measles virus Fusion protein in the post-fusion conformation
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2 / Details: Spontaneously sprung from the pre-fusion state
Source (natural)Organism: Measles virus strain Ichinose-B95a / Strain: Ichinose-B95a

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Macromolecule #1: Fusion glycoprotein F0

MacromoleculeName: Fusion glycoprotein F0 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Measles virus strain Ichinose-B95a
Molecular weightTheoretical: 12.498768 KDa
Recombinant expressionOrganism: Drosophila melanogaster (fruit fly)
SequenceString:
MGLKVNVSAI FMAVLLTLQT PTGQIHWGNL SKIGVVGIGS ASYKVMTRSS HQSLVIKLMP NITLLNNCTR VEIAEYRRLL RTVLEPIRD ALNAMTQNIR PVQSVASSRR HKR

UniProtKB: Fusion glycoprotein F0

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Macromolecule #2: Fusion glycoprotein F0

MacromoleculeName: Fusion glycoprotein F0 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Measles virus strain Ichinose-B95a
Molecular weightTheoretical: 44.89882 KDa
Recombinant expressionOrganism: Drosophila melanogaster (fruit fly)
SequenceString: FAGVVLAGAA LGVATAAQIT AGIALHQSML NSQAIDNLRA SLETTNQAIE AIRQAGQGMI LAVQGVQDYI NNELIPSMNQ LSCDLIGQK LGLKLLRYYT EILSLFGPSL RDPISAEISI QALSYALGGD INKVLEKLGY SGGDLLGILE SRGIKARITH V DTESYFIV ...String:
FAGVVLAGAA LGVATAAQIT AGIALHQSML NSQAIDNLRA SLETTNQAIE AIRQAGQGMI LAVQGVQDYI NNELIPSMNQ LSCDLIGQK LGLKLLRYYT EILSLFGPSL RDPISAEISI QALSYALGGD INKVLEKLGY SGGDLLGILE SRGIKARITH V DTESYFIV LSIAYPTLSE IKGVIVHRLE GVSYNIGSQE WYTTVPKYVA TQGYLISNFD ESSCTFMPEG TVCSQNALYP MS PLLQECL RGSTKSCART LVSGSFGNRF ILSQGNLIAN CASILCKCYT TGTIINQDPD KILTYIAADH CPVVEVNGVT IQV GSRRYP DAVYLHRIDL GPPISLGRLD VGTNLGNAIA KLEDAKELLE SSDQILRSMK GLSSTSIGVD DDDKAGWSHP QFEK GGGSG GGSGGGSWSH PQFEK

UniProtKB: Fusion glycoprotein F0

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Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 9 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #4: water

MacromoleculeName: water / type: ligand / ID: 4 / Number of copies: 134 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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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

Concentration0.5 mg/mL
BufferpH: 8 / Details: HEPES 50 mM, pH 8.0, NaCl 150 mM
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: GRAPHENE OXIDE / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 3 / Number real images: 6028 / Average exposure time: 2.0 sec. / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 900000
Startup modelType of model: INSILICO MODEL
Final reconstructionNumber classes used: 1 / Resolution.type: BY AUTHOR / Resolution: 2.73 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. v4.2) / Number images used: 158000
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software: (Name: cryoSPARC, RELION)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final 3D classificationNumber classes: 3 / Software - Name: RELION

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Atomic model buiding 1

Initial modelChain - Source name: SwissModel / Chain - Initial model type: in silico model
RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-8utf:
Structure of the Measles virus Fusion protein in the post-fusion conformation

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