5EZD

Crystal structure of a Hepatocyte growth factor activator inhibitor-1 (HAI-1) fragment covering the PKD-like 'internal' domain and Kunitz domain 1

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	BPTI-like	8070121	3000628	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	BPTI-like	8070121	3000628	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	Kunitz_BPTI	e5ezdA1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)
B	PKD_4	e5ezdB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PKD_4	ECOD (1.6)
B	Kunitz_BPTI	e5ezdB1	A: few secondary structure elements	X: BPTI-like (From Topology)	H: BPTI-like (From Topology)	T: BPTI-like	F: Kunitz_BPTI	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00014	Kunitz/Bovine pancreatic trypsin inhibitor domain (Kunitz_BPTI)	Kunitz/Bovine pancreatic trypsin inhibitor domain	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the ...	Indicative of a protease inhibitor, usually a serine protease inhibitor. Structure is a disulfide rich alpha+beta fold. BPTI (bovine pancreatic trypsin inhibitor) is an extensively studied model structure. Certain family members are similar to the tick anticoagulant peptide (TAP, Swiss:P17726). This is a highly selective inhibitor of factor Xa in the blood coagulation pathways [1]. TAP molecules are highly dipolar [2], and are arranged to form a twisted two- stranded antiparallel beta-sheet followed by an alpha helix [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Kunitz-type protease inhibitor 1	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	cellular component organization extracellular matrix organization cellular process cellular component organization or biogenesis extracellular structure organization external encapsulating structure organization developmental process epidermis development anatomical structure development tissue development multicellular organismal process chordate embryonic development labyrinthine layer development embryo development cellular component organization extracellular matrix organization cellular process cellular component organization or biogenesis extracellular structure organization external encapsulating structure organization developmental process epidermis development anatomical structure development tissue development multicellular organismal process chordate embryonic development labyrinthine layer development embryo development multicellular organism development embryonic placenta development embryo development ending in birth or egg hatching embryonic organ development epithelium development placenta development embryonic morphogenesis animal organ development morphogenesis of an epithelium branching involved in labyrinthine layer morphogenesis in utero embryonic development embryonic placenta morphogenesis anatomical structure morphogenesis labyrinthine layer morphogenesis tissue morphogenesis morphogenesis of a branching structure morphogenesis of a branching epithelium placenta blood vessel development vasculature development circulatory system development blood vessel development system development positive regulation of nervous system development regulation of cellular process cellular developmental process regulation of developmental process positive regulation of biological process cell development regulation of neurogenesis regulation of cell differentiation regulation of gliogenesis positive regulation of gliogenesis regulation of cell development regulation of nervous system development positive regulation of developmental process neurogenesis gliogenesis positive regulation of cell differentiation cell differentiation regulation of multicellular organismal process positive regulation of neurogenesis positive regulation of cellular process regulation of multicellular organismal development regulation of biological process biological regulation positive regulation of cell development regulation of glial cell differentiation positive regulation of glial cell differentiation nervous system development glial cell differentiation positive regulation of multicellular organismal process embryonic epithelial tube formation tube formation epithelial tube formation tube morphogenesis primary neural tube formation epithelial tube morphogenesis morphogenesis of embryonic epithelium neural tube development tube development neural tube closure neural tube formation anatomical structure formation involved in morphogenesis tube closure negative regulation of cell population proliferation negative regulation of neural precursor cell proliferation cell population proliferation negative regulation of biological process regulation of cell population proliferation negative regulation of cellular process neural precursor cell proliferation regulation of neural precursor cell proliferation cellular response to BMP stimulus cellular response to endogenous stimulus response to BMP cellular response to growth factor stimulus response to stimulus response to endogenous stimulus response to growth factor	membrane cellular anatomical entity extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle cell periphery plasma membrane intracellular anatomical structure membrane cellular anatomical entity extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle cell periphery plasma membrane intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002172	Low-density lipoprotein (LDL) receptor class A repeat	Repeat
A, B	IPR002223	Pancreatic trypsin inhibitor Kunitz domain	Domain
A, B	IPR036055	LDL receptor-like superfamily	Homologous Superfamily
A, B	IPR011106	Seven cysteines, N-terminal	Domain
A, B	IPR020901	Proteinase inhibitor I2, Kunitz, conserved site	Conserved Site
A, B	IPR036880	Pancreatic trypsin inhibitor Kunitz domain superfamily	Homologous Superfamily
A, B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B	IPR023415	Low-density lipoprotein (LDL) receptor class A, conserved site	Conserved Site
A, B	IPR013980	MANSC domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: O43278	breast fibroadenoma interstitial cystitis lung cancer pancreatic intraductal papillary-mucinous carcinoma spina bifida ductal breast carcinoma in situ invasive ductal breast carcinoma malignant mesothelioma pancreatic intraductal papillary-mucinous neoplasm ulcerative colitis facioscapulohumeral muscular dystrophy lung adenocarcinoma pancreatic ductal adenocarcinoma psoriasis

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.