Annotations: 9GCN

Co-crystal VHH (TPL1158_01_C09) - alpha-cobratoxin (Naja kaouthia)

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth Y]	SCOP2B Superfamily	Snake toxin-like	8043132	3000545	SCOP2B (2022-06-29)
C [auth V]	SCOP2B Superfamily	Snake toxin-like	8043132	3000545	SCOP2B (2022-06-29)
D [auth X]	SCOP2B Superfamily	Snake toxin-like	8043132	3000545	SCOP2B (2022-06-29)
E [auth Z]	SCOP2B Superfamily	Snake toxin-like	8043132	3000545	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B [auth Y]	Beta-Casp	e9gcnY1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
C [auth V]	Beta-Casp	e9gcnV1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
D [auth X]	Beta-Casp	e9gcnX1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
E [auth Z]	Beta-Casp	e9gcnZ1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth D], F [auth A], G [auth B], H [auth C]	Heavy Chain	IGHV1	-	alpha-cobratoxin	SAbDab (2026-06-12)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth Y], C [auth V], D [auth X], E [auth Z]	Alpha-cobratoxin	channel regulator activity ion channel regulator activity molecular function regulator activity transporter regulator activity neurotransmitter receptor regulator activity acetylcholine receptor regulator activity molecular function inhibitor activity acetylcholine receptor inhibitor activity signaling receptor inhibitor activity signaling receptor regulator activity toxin activity	-	cellular anatomical structure extracellular region
A [auth D], F [auth A], G [auth B], H [auth C]	Protein. Variable Domain of Heavy-Chain only Antibodies (VHH)	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth Y], C [auth V], D [auth X], E [auth Z]	IPR018354	Snake toxin, conserved site	Conserved Site
B [auth Y], C [auth V], D [auth X], E [auth Z]	IPR045860	Snake toxin-like superfamily	Homologous Superfamily
B [auth Y], C [auth V], D [auth X], E [auth Z]	IPR054131	Snake toxin cobra-type	Family
B [auth Y], C [auth V], D [auth X], E [auth Z]	IPR003571	Snake three-finger toxin	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.