Annotations: 5TOK

Crystal structure of the RSV F glycoprotein in complex with the neutralizing single-domain antibody F-VHH-L66

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F	MCM_N	e5tokF1	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
E	MCM_N	e5tokE1	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
D	MCM_N	e5tokD1	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
C	MCM_N	e5tokC1	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
C	C1-set	e5tokC2	A: alpha arrays	X: TIM beta/alpha-barrel	H: TIM barrels	T: TIM barrels	F: C1-set	ECOD (v295.2)
B	MCM_N	e5tokB2	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
B	C1-set	e5tokB3	A: alpha arrays	X: TIM beta/alpha-barrel	H: TIM barrels	T: TIM barrels	F: C1-set	ECOD (v295.2)
A	MCM_N	e5tokA1	A: alpha arrays	X: helical bundle domain in reverse transcriptase-like polymerases	H: helical bundle domain in reverse transcriptase-like polymerases	T: CARF (CRISPR-associated Rossmann fold) domains	F: MCM_N	ECOD (v295.2)
A	C1-set	e5tokA2	A: alpha arrays	X: TIM beta/alpha-barrel	H: TIM barrels	T: TIM barrels	F: C1-set	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
D, E, F	F-VHH-L66, neutralizing	VH	Lama glama (llama)	IGHV3S101, IGHJ401	V-DOMAIN VH	IG	VH	IMGT (202635-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D, E, F	Heavy Chain	IGHV1	-	fusion glycoprotein f0, fibritin chimera	SAbDab (2026-09-11)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D, E, F	Single-domain antibody F-VHH-L66	-	-	-
A, B, C	Fusion glycoprotein F0, Fibritin chimera	identical protein binding protein binding binding	symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated induction of syncytium formation symbiont-mediated perturbation of host process modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane viral process cellular process cellular component organization or biogenesis symbiont-mediated perturbation of host cellular process biological process involved in interspecies interaction between organisms symbiont-mediated induction of syncytium formation symbiont-mediated perturbation of host process modulation of process of another organism biological process involved in interaction with host biological process involved in symbiotic interaction membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane viral process cellular process cellular component organization or biogenesis membrane fusion involved in viral entry into host cell virion attachment to host cell receptor-mediated virion attachment to host cell adhesion of symbiont to host cell entry receptor-mediated virion attachment to host cell viral life cycle adhesion of symbiont to host symbiont entry into host cell symbiont entry into host	cell periphery cellular anatomical structure plasma membrane membrane virion component viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane other organism part virion membrane host intracellular part cell periphery cellular anatomical structure plasma membrane membrane virion component viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane other organism part virion membrane host intracellular part host cell Golgi membrane host cell Golgi apparatus host cell cytoplasm part host cell cytoplasm host cell endomembrane system host intracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR000776	Precursor fusion glycoprotein F0, Paramyxoviridae	Family

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.