1PX9

Solution structure of the native CnErg1 Ergtoxin, a highly specific inhibitor of HERG channel

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1px9a_	Small proteins	Knottins (small inhibitors, toxins, lectins)	Scorpion toxin-like	Short-chain scorpion toxins	Ergtoxin (HERG specific toxin CnErg1)	(Centruroides noxius ) [TaxId: 6878 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Short-chain scorpion toxins	8025974	4003142	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Scorpion toxin-like	8038353	3000309	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF08086	e1px9A1	A: few secondary structure elements	X: omega toxin-like	H: omega toxin-related	T: Scorpion toxin-like	F: PF08086	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.30.10	Alpha Beta	2-Layer Sandwich	Defensin A-like	Knottin, scorpion toxin-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF08086	Ergtoxin family (Toxin_17)	Ergtoxin family	This family consists of ergtoxin peptides which are toxins secreted by the scorpions. The ergtoxins are capable of blocking the function of K+ channels. More than 100 ergtoxins have been found from scorpion venoms and they have been classified in ...	This family consists of ergtoxin peptides which are toxins secreted by the scorpions. The ergtoxins are capable of blocking the function of K+ channels. More than 100 ergtoxins have been found from scorpion venoms and they have been classified into three subfamilies according to their primary structures [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	ergtoxin	molecular function inhibitor activity potassium channel regulator activity channel regulator activity transporter inhibitor activity ion channel inhibitor activity ion channel regulator activity potassium channel inhibitor activity molecular function regulator activity transporter regulator activity channel inhibitor activity toxin activity	-	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036574	Knottin, scorpion toxin-like superfamily	Homologous Superfamily
A	IPR012622	Potassium channel toxin gamma/Ergtoxin	Family

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 R01GM133198.