Annotations: 3QIK

Crystal structure of the first PDZ domain of PREX1

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Ribosomal_L13	e3qikA1	A: alpha arrays	X: N-terminal beta-sandwich domain in anthrax protective antigen	H: L30e-like	T: L30e-like	F: Ribosomal_L13	ECOD (v295)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.42.10	Mainly Beta	Roll	Pdz3 Domain	PDZ domain	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger 1 protein	GTPase regulator activity enzyme regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity molecular function regulator activity binding phospholipid binding lipid binding guanyl-nucleotide exchange factor activity protein kinase inhibitor activity molecular function inhibitor activity enzyme inhibitor activity GTPase regulator activity enzyme regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity molecular function regulator activity binding phospholipid binding lipid binding guanyl-nucleotide exchange factor activity protein kinase inhibitor activity molecular function inhibitor activity enzyme inhibitor activity protein kinase regulator activity protein serine/threonine kinase inhibitor activity kinase inhibitor activity kinase regulator activity protein binding enzyme binding	superoxide metabolic process reactive oxygen species metabolic process metabolic process cellular process neutrophil activation multicellular organismal process immune system process cell activation myeloid leukocyte activation granulocyte activation leukocyte activation protein polymerization actin polymerization or depolymerization actin filament polymerization superoxide metabolic process reactive oxygen species metabolic process metabolic process cellular process neutrophil activation multicellular organismal process immune system process cell activation myeloid leukocyte activation granulocyte activation leukocyte activation protein polymerization actin polymerization or depolymerization actin filament polymerization actin cytoskeleton organization protein-containing complex organization actin filament organization cellular component organization cellular component biogenesis organelle organization cellular component assembly protein-containing complex assembly actin filament-based process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization regulation of neuron projection development regulation of cellular component organization regulation of cellular process regulation of developmental process cellular developmental process cell projection organization cell development neuron projection development neurogenesis multicellular organism development neuron differentiation dendrite development cell differentiation anatomical structure development system development developmental process regulation of biological process plasma membrane bounded cell projection organization regulation of cell projection organization biological regulation nervous system development generation of neurons regulation of dendrite development neuron development regulation of plasma membrane bounded cell projection organization cellular response to stimulus response to stimulus negative regulation of signaling signaling negative regulation of intracellular signal transduction negative regulation of biological process regulation of signal transduction negative regulation of cell communication intracellular signal transduction cell communication negative regulation of TOR signaling regulation of intracellular signal transduction negative regulation of cellular process signal transduction TOR signaling regulation of signaling regulation of TOR signaling negative regulation of response to stimulus negative regulation of signal transduction regulation of response to stimulus regulation of cell communication positive regulation of locomotion regulation of cell motility positive regulation of biological process positive regulation of cell migration regulation of locomotion positive regulation of cell motility regulation of cell migration cell migration cell motility locomotion positive regulation of cellular process small GTPase-mediated signal transduction regulation of small GTPase mediated signal transduction intracellular signaling cassette G protein-coupled receptor signaling pathway regulation of cytoskeleton organization regulation of actin filament-based process regulation of cellular component size regulation of protein-containing complex assembly regulation of actin filament polymerization regulation of biological quality regulation of actin filament organization regulation of actin polymerization or depolymerization regulation of cellular component biogenesis regulation of organelle organization regulation of protein polymerization regulation of actin filament length regulation of actin cytoskeleton organization regulation of supramolecular fiber organization regulation of anatomical structure size	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane growth cone axon cell projection distal axon neuron projection plasma membrane bounded cell projection site of polarized growth cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane growth cone axon cell projection distal axon neuron projection plasma membrane bounded cell projection site of polarized growth somatodendritic compartment dendrite dendritic tree dendritic shaft perinuclear region of cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001849	Pleckstrin homology domain	Domain
A	IPR000591	DEP domain	Domain
A	IPR000219	Dbl homology domain	Domain
A	IPR011993	PH-like domain superfamily	Homologous Superfamily
A	IPR001331	Guanine-nucleotide dissociation stimulator, CDC24, conserved site	Conserved Site
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A	IPR036034	PDZ superfamily	Homologous Superfamily
A	IPR035899	Dbl homology (DH) domain superfamily	Homologous Superfamily
A	IPR051832	Regulators of mTOR signaling and Rac activation	Family
A	IPR001478	PDZ domain	Domain
A	IPR055251	SOS1/NGEF-like, PH domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q8TCU6	ulcerative colitis atypical teratoid rhabdoid tumor breast fibroadenoma endogenous depression invasive ductal breast carcinoma lung carcinoma osteosarcoma plasma cell myeloma breast cancer colorectal adenoma heart disease large cell medulloblastoma medulloblastoma ovarian cancer subependymal giant cell astrocytoma ulcerative colitis atypical teratoid rhabdoid tumor breast fibroadenoma endogenous depression invasive ductal breast carcinoma lung carcinoma osteosarcoma plasma cell myeloma breast cancer colorectal adenoma heart disease large cell medulloblastoma medulloblastoma ovarian cancer subependymal giant cell astrocytoma breast carcinoma colorectal cancer interstitial cystitis lung adenocarcinoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma

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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.