Annotations: 3KFV

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	SH3-domain	8019126	4000369	SCOP2 (2022-06-29)
A	SCOP2 Family	Guanylate kinase-like	8019125	4004031	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	SH3-domain	8058034	3000153	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	P-loop nucleotide/nucleoside kinase-like	8058035	3002021	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	SH3_2	e3kfvA2	A: beta barrels	X: SH3	H: SH3	T: SH3	F: SH3_2	ECOD (1.6)
A	Guanylate_kin	e3kfvA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Guanylate_kin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.40	Mainly Beta	Roll	SH3 type barrels.	SH3 Domains	CATH (4.3.0)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00625	Guanylate kinase (Guanylate_kin)	Guanylate kinase	-	Domain
A	PF07653	Variant SH3 domain (SH3_2)	Variant SH3 domain	SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organisation. First described in the Src cytoplasmic tyrosine kinase Swiss:P12931. The structure is a partly opened beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Tight junction protein ZO-3	cell adhesion molecule binding protein binding binding	multicellular organismal process regulation of blood-brain barrier permeability system process maintenance of blood-brain barrier homeostatic process positive regulation of vascular permeability biological regulation positive regulation of blood-brain barrier permeability tissue homeostasis regulation of vascular permeability circulatory system process multicellular organismal-level homeostasis vascular process in circulatory system anatomical structure homeostasis multicellular organismal process regulation of blood-brain barrier permeability system process maintenance of blood-brain barrier homeostatic process positive regulation of vascular permeability biological regulation positive regulation of blood-brain barrier permeability tissue homeostasis regulation of vascular permeability circulatory system process multicellular organismal-level homeostasis vascular process in circulatory system anatomical structure homeostasis regulation of biological quality blood circulation protein localization localization cellular localization cellular macromolecule localization macromolecule localization cellular process protein localization to cell junction protein localization to cell-cell junction cell adhesion cell-cell adhesion developmental process epithelium development endothelial cell differentiation cellular developmental process endothelium development cell development tissue development epithelial cell differentiation endothelial cell development establishment of endothelial intestinal barrier epithelial cell development cell differentiation establishment of endothelial barrier anatomical structure development cellular component organization cell junction organization cellular component organization or biogenesis cell-cell junction organization	cell junction cellular anatomical entity cell-cell junction apical junction complex bicellular tight junction tight junction anchoring junction cell periphery plasma membrane membrane membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen cell junction cellular anatomical entity cell-cell junction apical junction complex bicellular tight junction tight junction anchoring junction cell periphery plasma membrane membrane membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008145	Guanylate kinase/L-type calcium channel beta subunit	Domain
A	IPR036034	PDZ superfamily	Homologous Superfamily
A	IPR001452	SH3 domain	Domain
A	IPR005417	Tight junction protein ZO	Family
A	IPR036028	SH3-like domain superfamily	Homologous Superfamily
A	IPR005420	Tight junction protein ZO-3	Family
A	IPR008144	Guanylate kinase-like domain	Domain
A	IPR001478	PDZ domain	Domain
A	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: O95049	prostate cancer ductal breast carcinoma in situ pancreatic intraductal papillary-mucinous neoplasm Prostatic Neoplasms invasive ductal breast carcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia pancreatic intraductal papillary-mucinous carcinoma

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.