7UIB | pdb_00007uib

Crystal structure of BoNT/E receptor binding domain in complex with SV2, VHH, and sialic acid

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth E]		e7uibE1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)
A [auth B]		e7uibB1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)
F [auth A]		e7uibA1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)
E [auth D]		e7uibD1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)
D [auth F]		e7uibF1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)
B [auth C]		e7uibC1	A: Family A G protein-coupled receptor-like	X: Family A G protein-coupled receptor-like	H: Family A G protein-coupled receptor-like	T: Rhabdo_ncap	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth B], C [auth E]	Heavy Chain	IGHV1	-	neurotoxin type e	SAbDab (2026-03-13)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], C [auth E]	VHH-G6	-	-	-
E [auth D], F [auth A]	Neurotoxin type E	binding lipid binding macromolecule transmembrane transporter activity protein transporter activity protein transmembrane transporter activity transporter activity transmembrane transporter activity peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity binding lipid binding macromolecule transmembrane transporter activity protein transporter activity protein transmembrane transporter activity transporter activity transmembrane transporter activity peptidase activity catalytic activity, acting on a protein metalloendopeptidase activity hydrolase activity metallopeptidase activity catalytic activity endopeptidase activity toxin activity cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding	proteolysis metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process	cellular anatomical structure extracellular region host cellular component host cell part host cell synapse host cell membrane host cell presynaptic membrane other organism part host intracellular part host cell cytoplasm host intracellular region host cell cytosol host cell cytoplasm part host intracellular membrane-bounded organelle cellular anatomical structure extracellular region host cellular component host cell part host cell synapse host cell membrane host cell presynaptic membrane other organism part host intracellular part host cell cytoplasm host intracellular region host cell cytosol host cell cytoplasm part host intracellular membrane-bounded organelle host intracellular organelle host cell cytoplasmic vesicle
B [auth C], D [auth F]	SV2	transporter activity transmembrane transporter activity	localization transport neurotransmitter transport establishment of localization trans-synaptic signaling synaptic signaling regulation of biological process signaling anterograde trans-synaptic signaling biological regulation cell-cell signaling cellular process chemical synaptic transmission cell communication localization transport neurotransmitter transport establishment of localization trans-synaptic signaling synaptic signaling regulation of biological process signaling anterograde trans-synaptic signaling biological regulation cell-cell signaling cellular process chemical synaptic transmission cell communication regulation of localization cellular localization regulated exocytosis regulation of cellular process modulation of chemical synaptic transmission synaptic vesicle cycle synaptic vesicle exocytosis vesicle-mediated transport vesicle-mediated transport in synapse regulation of regulated secretory pathway regulation of secretion by cell secretion by cell signal release establishment of localization in cell regulation of signaling neurotransmitter secretion regulation of transport secretion regulation of neurotransmitter transport regulation of synaptic vesicle exocytosis export from cell regulation of vesicle-mediated transport regulation of secretion signal release from synapse regulation of trans-synaptic signaling exocytosis regulation of neurotransmitter secretion regulation of exocytosis regulation of cell communication	cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle intracellular anatomical structure synapse intracellular vesicle transport vesicle membrane endomembrane system intracellular organelle presynapse bounding membrane of organelle cytoplasmic vesicle cell periphery cellular anatomical structure plasma membrane membrane membrane-bounded organelle intracellular anatomical structure synapse intracellular vesicle transport vesicle membrane endomembrane system intracellular organelle presynapse bounding membrane of organelle cytoplasmic vesicle vesicle membrane synaptic vesicle synaptic vesicle membrane cell junction vesicle transport vesicle exocytic vesicle membrane intracellular membrane-bounded organelle cytoplasmic vesicle membrane organelle secretory vesicle cytoplasm organelle membrane exocytic vesicle dopaminergic synapse

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth D], F [auth A]	IPR000395	Botulinum/Tetanus toxin, catalytic chain	Domain
E [auth D], F [auth A]	IPR012928	Clostridium neurotoxin, receptor binding N-terminal	Domain
E [auth D], F [auth A]	IPR012500	Clostridium neurotoxin, translocation	Domain
E [auth D], F [auth A]	IPR011065	Kunitz inhibitor STI-like superfamily	Homologous Superfamily
E [auth D], F [auth A]	IPR013104	Clostridium neurotoxin, receptor-binding C-terminal	Domain
E [auth D], F [auth A]	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
E [auth D], F [auth A]	IPR036248	Clostridium neurotoxin, translocation domain	Homologous Superfamily
B [auth C], D [auth F]	IPR022308	Synaptic vesicle protein SV2	Family
B [auth C], D [auth F]	IPR011701	Major facilitator superfamily	Family
B [auth C], D [auth F]	IPR005828	Major facilitator, sugar transporter-like	Family
B [auth C], D [auth F]	IPR005829	Sugar transporter, conserved site	Conserved Site
B [auth C], D [auth F]	IPR055415	SV2A/B/C, luminal domain	Domain
B [auth C], D [auth F]	IPR036259	MFS transporter superfamily	Homologous Superfamily
B [auth C], D [auth F]	IPR020846	Major facilitator superfamily domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth C], D [auth F]	Pharos: Q496J9	astrocytic tumor malignant ependymoma oligodendroglioma glioblastoma malignant glioma ovarian cancer large cell medulloblastoma medulloblastoma pilocytic astrocytoma

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.