Annotations: 1SKZ

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1skza1	Small proteins	Knottins (small inhibitors, toxins, lectins)	Leech antihemostatic proteins	Huristasin-like	Factor Xa inhibitor antistasin	Mexican leech (Haementeria officinalis ) [TaxId: 6410 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Huristasin-like	8026002	4003247	SCOP2 (2022-06-29)
A	SCOP2 Family	Huristasin-like	8026003	4003247	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Leech antihemostatic proteins	8038381	3000489	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Leech antihemostatic proteins	8038382	3000489	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	Antistasin	e1skzA1	A: few secondary structure elements	X: Huristasin-like (From Topology)	H: Huristasin-like (From Topology)	T: Huristasin-like	F: Antistasin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.10.22.10	Mainly Beta	Ribbon	Antistasin	domain 1	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	ANTISTASIN	enzyme regulator activity molecular function inhibitor activity peptidase regulator activity serine-type endopeptidase inhibitor activity molecular function regulator activity enzyme inhibitor activity peptidase inhibitor activity endopeptidase regulator activity endopeptidase inhibitor activity heparin binding glycosaminoglycan binding binding carbohydrate derivative binding sulfur compound binding	multicellular organismal process regulation of biological process negative regulation of coagulation biological regulation negative regulation of biological process coagulation regulation of multicellular organismal process negative regulation of multicellular organismal process regulation of coagulation	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004094	Antistasin-like domain	Domain
A	IPR008086	Proteinase inhibitor I15, leech antistasin	Family
A	IPR011061	Hirudin/antistatin	Homologous Superfamily

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.