6BLH

RSV G central conserved region bound to Fab CB017.5

PDB DOI: 10.2210/pdb6BLH/pdb

Classification: VIRAL PROTEIN/IMMUNE SYSTEM
Organism(s): Homo sapiens, Human respiratory syncytial virus (strain RSB6256)
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2017-11-10 Released: 2018-02-28
Deposition Author(s): Jones, H.G., McLellan, J.S., Langedijk, J.P.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.00 Å
R-Value Free: 0.226
R-Value Work: 0.187
R-Value Observed: 0.189

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Structural basis for recognition of the central conserved region of RSV G by neutralizing human antibodies.

Jones, H.G., Ritschel, T., Pascual, G., Brakenhoff, J.P.J., Keogh, E., Furmanova-Hollenstein, P., Lanckacker, E., Wadia, J.S., Gilman, M.S.A., Williamson, R.A., Roymans, D., van 't Wout, A.B., Langedijk, J.P., McLellan, J.S.

(2018) PLoS Pathog 14: e1006935-e1006935

PubMed: 29509814 Search on PubMedSearch on PubMed Central
DOI: 10.1371/journal.ppat.1006935
Primary Citation of Related Structures:
6BLH, 6BLI

PubMed Abstract:

Respiratory syncytial virus (RSV) is a major cause of severe lower respiratory tract infections in infants and the elderly, and yet there remains no effective treatment or vaccine. The surface of the virion is decorated with the fusion glycoprotein (RSV F) and the attachment glycoprotein (RSV G), which binds to CX3CR1 on human airway epithelial cells to mediate viral attachment and subsequent infection. RSV G is a major target of the humoral immune response, and antibodies that target the central conserved region of G have been shown to neutralize both subtypes of RSV and to protect against severe RSV disease in animal models. However, the molecular underpinnings for antibody recognition of this region have remained unknown. Therefore, we isolated two human antibodies directed against the central conserved region of RSV G and demonstrated that they neutralize RSV infection of human bronchial epithelial cell cultures in the absence of complement. Moreover, the antibodies protected cotton rats from severe RSV disease. Both antibodies bound with high affinity to a secreted form of RSV G as well as to a peptide corresponding to the unglycosylated central conserved region. High-resolution crystal structures of each antibody in complex with the G peptide revealed two distinct conformational epitopes that require proper folding of the cystine noose located in the C-terminal part of the central conserved region. Comparison of these structures with the structure of fractalkine (CX3CL1) alone or in complex with a viral homolog of CX3CR1 (US28) suggests that RSV G would bind to CX3CR1 in a mode that is distinct from that of fractalkine. Collectively, these results build on recent studies demonstrating the importance of RSV G in antibody-mediated protection from severe RSV disease, and the structural information presented here should guide the development of new vaccines and antibody-based therapies for RSV.

Organizational Affiliation:

Department of Biochemistry and Cell Biology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, United States of America.

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab CB017.5 light chain	A [auth L]	214	Homo sapiens	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
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Reference Sequence

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Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab CB017.5 heavy chain	B [auth H]	234	Homo sapiens	Mutation(s): 0
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
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Reference Sequence

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(by identity cutoff) | 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Major surface glycoprotein G	C [auth G]	45	Human respiratory syncytial virus (strain RSB6256)	Mutation(s): 0 Gene Names: G
UniProt
Find proteins for P27025 (Human respiratory syncytial virus A (strain rsb6256)) Explore P27025 Go to UniProtKB: P27025
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P27025
Protein Feature View Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
EDO Query on EDO Download Ideal Coordinates CCD File SDF format, chain D [auth L] MOL2 format, chain D [auth L]	D [auth L]	1,2-ETHANEDIOL C₂ H₆ O₂ LYCAIKOWRPUZTN-UHFFFAOYSA-N		Ligand Interaction