4TPV

Crystal Structure of Hookworm Platelet Inhibitor

External Resource: Annotation

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: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	PR-1-like	8100385	4001882	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	PR-1-like	8100386	3000495	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	PR-1-like	8100386	3000495	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)
A	CAP_1	e4tpvA1	A: a+b three layers	X: PR-1-like (From Topology)	H: PR-1-like (From Topology)	T: PR-1-like	F: CAP_1	ECOD (1.6)
B	CAP_1	e4tpvB1	A: a+b three layers	X: PR-1-like (From Topology)	H: PR-1-like (From Topology)	T: PR-1-like	F: CAP_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.33.10	Alpha Beta	3-Layer(aba) Sandwich	Pathogenesis-related Protein p14a	CAP	CATH (4.3.0)
B	3.40.33.10	Alpha Beta	3-Layer(aba) Sandwich	Pathogenesis-related Protein p14a	CAP	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00188	Cysteine-rich secretory protein family (CAP)	Cysteine-rich secretory protein family	This is a large family of cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 proteins (CAP) that are found in a wide range of organisms, including prokaryotes [2] and non-vertebrate eukaryotes [3], The nine subfamilies of the mam ...	This is a large family of cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 proteins (CAP) that are found in a wide range of organisms, including prokaryotes [2] and non-vertebrate eukaryotes [3], The nine subfamilies of the mammalian CAP 'super'family include: the human glioma pathogenesis-related 1 (GLIPR1), Golgi associated pathogenesis related-1 (GAPR1) proteins, peptidase inhibitor 15 (PI15), peptidase inhibitor 16 (PI16), cysteine-rich secretory proteins (CRISPs), CRISP LCCL domain containing 1 (CRISPLD1), CRISP LCCL domain containing 2 (CRISPLD2), mannose receptor like and the R3H domain containing like proteins. Members are most often secreted and have an extracellular endocrine or paracrine function and are involved in processes including the regulation of extracellular matrix and branching morphogenesis, potentially as either proteases or protease inhibitors; in ion channel regulation in fertility; as tumour suppressor or pro-oncogenic genes in tissues including the prostate; and in cell-cell adhesion during fertilisation. The overall protein structural conservation within the CAP 'super'family results in fundamentally similar functions for the CAP domain in all members, yet the diversity outside of this core region dramatically alters the target specificity and, thus, the biological consequences [4]. The Ca++-chelating function [3] would fit with the various signalling processes (e.g. the CRISP proteins) that members of this family are involved in, and also the sequence and structural evidence of a conserved pocket containing two histidines and a glutamate. It also may explain how Swiss:Q91055 blocks the Ca++ transporting ryanodine receptors.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Platelet inhibitor	toxin activity	-	cellular anatomical structure extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR014044	CAP domain	Domain
A, B	IPR035940	CAP superfamily	Homologous Superfamily
A, B	IPR001283	Cysteine-rich secretory protein-related	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 R01GM157729.