Annotations: 1I4D

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1i4da_	All alpha proteins	BAR/IMD domain-like	BAR/IMD domain-like	Arfaptin, Rac-binding fragment	Arfaptin, Rac-binding fragment	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1i4db_	All alpha proteins	BAR/IMD domain-like	BAR/IMD domain-like	Arfaptin, Rac-binding fragment	Arfaptin, Rac-binding fragment	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth D]	d1i4dd_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	G proteins	Rac	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Arfaptin, Rac-binding fragment	8021259	4003827	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	BAR/IMD domain-like	8033639	3000528	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	BAR/IMD domain-like	8033639	3000528	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	Ras-like P-loop GTPases	8057406	3002022	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	Arfaptin	e1i4dA1	A: alpha duplicates or obligate multimers	X: BAR/IMD domain-like	H: BAR/IMD domain-like (From Topology)	T: BAR/IMD domain-like	F: Arfaptin	ECOD (1.6)
B	Arfaptin	e1i4dB1	A: alpha duplicates or obligate multimers	X: BAR/IMD domain-like	H: BAR/IMD domain-like (From Topology)	T: BAR/IMD domain-like	F: Arfaptin	ECOD (1.6)
C [auth D]	Ras	e1i4dD1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Ras	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1270.60	Mainly Alpha	Up-down Bundle	Substrate Binding Domain Of Dnak	Chain:A	CATH (4.3.0)
B	1.20.1270.60	Mainly Alpha	Up-down Bundle	Substrate Binding Domain Of Dnak	Chain:A	CATH (4.3.0)
C [auth D]	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
C [auth D]	PF00071	Ras family (Ras)	Ras family	Includes sub-families Ras, Rab, Rac, Ral, Ran, Rap Ypt1 and more. Shares P-loop motif with GTP_EFTU, arf and myosin_head. See Pfam:PF00009 Pfam:PF00025, Pfam:PF00063. As regards Rab GTPases, these are important regulators of vesicle formation, motil ...	Includes sub-families Ras, Rab, Rac, Ral, Ran, Rap Ypt1 and more. Shares P-loop motif with GTP_EFTU, arf and myosin_head. See Pfam:PF00009 Pfam:PF00025, Pfam:PF00063. As regards Rab GTPases, these are important regulators of vesicle formation, motility and fusion. They share a fold in common with all Ras GTPases: this is a six-stranded beta-sheet surrounded by five alpha-helices [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	ARFAPTIN 2	small GTPase binding protein binding binding enzyme binding GTPase binding protein domain specific binding GTP-dependent protein binding phospholipid binding lipid binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding small GTPase binding protein binding binding enzyme binding GTPase binding protein domain specific binding GTP-dependent protein binding phospholipid binding lipid binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding organic cyclic compound binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cell adhesion molecule binding cadherin binding phosphatidylinositol phosphate binding phosphatidylinositol-4-phosphate binding phosphatidylinositol binding membrane curvature sensor activity molecular sensor activity molecular function regulator activity identical protein binding	lamellipodium assembly plasma membrane bounded cell projection organization cell projection organization plasma membrane bounded cell projection assembly cellular component organization cellular component biogenesis cellular component assembly lamellipodium organization cellular process cellular component organization or biogenesis cell projection assembly organelle organization actin cytoskeleton organization actin filament-based process lamellipodium assembly plasma membrane bounded cell projection organization cell projection organization plasma membrane bounded cell projection assembly cellular component organization cellular component biogenesis cellular component assembly lamellipodium organization cellular process cellular component organization or biogenesis cell projection assembly organelle organization actin cytoskeleton organization actin filament-based process cytoskeleton organization protein localization cellular localization establishment of protein localization nitrogen compound transport transport intracellular transport establishment of localization localization protein transport establishment of localization in cell cellular macromolecule localization macromolecule localization intracellular protein transport ruffle organization regulation of Arp2/3 complex-mediated actin nucleation regulation of cytoskeleton organization regulation of cellular component organization regulation of cellular process regulation of actin filament-based process regulation of actin nucleation regulation of biological process regulation of actin filament organization actin filament organization biological regulation Arp2/3 complex-mediated actin nucleation regulation of organelle organization regulation of actin cytoskeleton organization regulation of supramolecular fiber organization actin nucleation supramolecular fiber organization cellular catabolic process mitophagy catabolic process macroautophagy cellular metabolic process autophagy metabolic process autophagy of mitochondrion process utilizing autophagic mechanism cellular response to stimulus small GTPase-mediated signal transduction response to stimulus signaling intracellular signal transduction cell communication intracellular signaling cassette signal transduction autophagosome organization autophagosome assembly organelle assembly vacuole organization protein localization to phagophore assembly site	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle cellular anatomical entity nucleolus intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle cell periphery cell cortex cytoplasm cytosol plasma membrane membrane Golgi apparatus endomembrane system ruffle cell projection cell leading edge plasma membrane bounded cell projection Golgi apparatus subcompartment organelle subcompartment trans-Golgi network membrane trans-Golgi network organelle membrane
C [auth D]	RAS-RELATED C3 BOTULINUM TOXIN SUBSTRATE 1	thioesterase binding protein binding binding enzyme binding protein-containing complex binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity Rho GDP-dissociation inhibitor binding GDP-dissociation inhibitor binding thioesterase binding protein binding binding enzyme binding protein-containing complex binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity Rho GDP-dissociation inhibitor binding GDP-dissociation inhibitor binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding organic cyclic compound binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding kinase binding protein kinase binding G protein activity molecular function regulator activity	regulation of biological process regulation of cell motility regulation of cellular process regulation of leukocyte migration biological regulation neutrophil migration granulocyte migration leukocyte migration immune system process regulation of locomotion myeloid leukocyte migration regulation of cell migration cell migration cellular process regulation of biological process regulation of cell motility regulation of cellular process regulation of leukocyte migration biological regulation neutrophil migration granulocyte migration leukocyte migration immune system process regulation of locomotion myeloid leukocyte migration regulation of cell migration cell migration cellular process regulation of immune system process cell motility regulation of neutrophil migration locomotion lamellipodium assembly plasma membrane bounded cell projection organization cell projection organization plasma membrane bounded cell projection assembly cellular component organization cellular component biogenesis cellular component assembly lamellipodium organization cellular component organization or biogenesis cell projection assembly regulation of cell-substrate adhesion positive regulation of cell adhesion regulation of cell adhesion positive regulation of biological process cell-substrate adhesion cell adhesion positive regulation of cell-substrate adhesion positive regulation of cellular process regulation of cellular component size regulation of biological quality regulation of cell size regulation of anatomical structure size substrate adhesion-dependent cell spreading multicellular organismal process cellular biosynthetic process negative regulation of biological process negative regulation of cellular metabolic process cytokine production regulation of cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process cellular metabolic process negative regulation of metabolic process regulation of cellular metabolic process negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process negative regulation of cellular biosynthetic process regulation of cellular biosynthetic process interleukin-23 production regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of interleukin-23 production negative regulation of multicellular organismal process regulation of metabolic process negative regulation of interleukin-23 production positive regulation of substrate adhesion-dependent cell spreading regulation of substrate adhesion-dependent cell spreading organelle organization actin cytoskeleton organization actin filament-based process cytoskeleton organization cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling cell surface receptor protein tyrosine kinase signaling pathway cell communication hepatocyte growth factor receptor signaling pathway signal transduction enzyme-linked receptor protein signaling pathway regulation of cellular component organization positive regulation of cellular component organization cell-substrate junction assembly positive regulation of cell-substrate junction organization cell junction assembly regulation of cell-substrate junction organization focal adhesion assembly positive regulation of focal adhesion assembly positive regulation of cellular component biogenesis positive regulation of cell-matrix adhesion regulation of cellular component biogenesis regulation of cell junction assembly positive regulation of cell junction assembly cell junction organization cell-matrix adhesion regulation of cell-matrix adhesion cell-substrate junction organization regulation of focal adhesion assembly regulation of cell-substrate junction assembly regulation of localization import into cell transport negative regulation of transport negative regulation of endocytosis vesicle-mediated transport localization regulation of endocytosis negative regulation of cellular component organization negative regulation of receptor-mediated endocytosis regulation of transport regulation of receptor-mediated endocytosis regulation of vesicle-mediated transport establishment of localization endocytosis receptor-mediated endocytosis Wnt signaling pathway, planar cell polarity pathway non-canonical Wnt signaling pathway Wnt signaling pathway small GTPase-mediated signal transduction Rac protein signal transduction intracellular signal transduction intracellular signaling cassette cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis response to chemical response to stress response to wounding establishment or maintenance of cell polarity ruffle organization positive regulation of organelle organization regulation of cytoskeleton organization regulation of microtubule polymerization or depolymerization microtubule cytoskeleton organization regulation of protein-containing complex assembly positive regulation of protein-containing complex assembly microtubule polymerization or depolymerization positive regulation of protein polymerization protein-containing complex assembly protein polymerization positive regulation of microtubule polymerization or depolymerization protein-containing complex organization positive regulation of cytoskeleton organization regulation of microtubule-based process microtubule polymerization positive regulation of supramolecular fiber organization regulation of organelle organization positive regulation of microtubule polymerization regulation of protein polymerization regulation of microtubule polymerization regulation of supramolecular fiber organization microtubule-based process supramolecular fiber organization regulation of microtubule cytoskeleton organization actin filament organization sphingolipid mediated signaling pathway sphingosine-1-phosphate receptor signaling pathway G protein-coupled receptor signaling pathway negative regulation of locomotion regulation of fibroblast migration fibroblast migration negative regulation of fibroblast migration ameboidal-type cell migration negative regulation of cell motility negative regulation of cell migration positive regulation of locomotion endothelial cell migration positive regulation of cell migration positive regulation of endothelial cell migration positive regulation of cell motility regulation of endothelial cell migration regulation of actin filament-based process regulation of actin filament bundle assembly actin filament bundle organization stress fiber assembly regulation of actin filament organization actomyosin structure organization regulation of stress fiber assembly contractile actin filament bundle assembly regulation of actomyosin structure organization actin filament bundle assembly regulation of actin cytoskeleton organization actin polymerization or depolymerization actin filament polymerization axonogenesis cellular developmental process motor neuron axon guidance plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development system development developmental process axon guidance nervous system development axon development cell morphogenesis involved in neuron differentiation generation of neurons anatomical structure morphogenesis neuron projection guidance neuron development positive regulation of cell communication positive regulation of signal transduction regulation of small GTPase mediated signal transduction regulation of signal transduction Rho protein signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction regulation of signaling positive regulation of intracellular signal transduction regulation of Rho protein signal transduction positive regulation of Rho protein signal transduction regulation of response to stimulus regulation of cell communication positive regulation of small GTPase mediated signal transduction positive regulation of signaling respiratory burst regulation of respiratory burst positive regulation of chemotaxis positive regulation of neutrophil chemotaxis positive regulation of immune system process regulation of leukocyte chemotaxis positive regulation of leukocyte chemotaxis positive regulation of granulocyte chemotaxis regulation of neutrophil chemotaxis regulation of response to external stimulus neutrophil chemotaxis regulation of granulocyte chemotaxis positive regulation of response to external stimulus positive regulation of leukocyte migration positive regulation of neutrophil migration regulation of chemotaxis granulocyte chemotaxis leukocyte chemotaxis reactive oxygen species metabolic process hydrogen peroxide metabolic process regulation of hydrogen peroxide metabolic process regulation of reactive oxygen species metabolic process regulation of nitric oxide biosynthetic process reactive nitrogen species metabolic process nitric oxide metabolic process nitric oxide biosynthetic process regulation of nitric oxide metabolic process regulation of developmental process regulation of cell shape regulation of cell morphogenesis regulation of anatomical structure morphogenesis cortical cytoskeleton organization semaphorin-plexin signaling pathway ruffle assembly positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of cellular metabolic process positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process regulation of phosphate metabolic process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein modification process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process primary metabolic process macromolecule modification regulation of phosphorus metabolic process regulation of phosphorylation defense response inflammatory response cellular localization localization within membrane neuron migration regulation of cell projection organization regulation of cell projection assembly regulation of plasma membrane bounded cell projection assembly regulation of lamellipodium assembly regulation of lamellipodium organization regulation of plasma membrane bounded cell projection organization membrane organization engulfment of apoptotic cell phagocytosis, engulfment membrane invagination phagocytosis apoptotic cell clearance plasma membrane invagination positive regulation of cell projection organization positive regulation of lamellipodium assembly positive regulation of lamellipodium organization positive regulation of plasma membrane bounded cell projection assembly positive regulation of actin filament bundle assembly positive regulation of stress fiber assembly	cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle intracellular anatomical structure cytoplasm cytosol synapse cell junction glutamatergic synapse Golgi apparatus subcompartment Golgi apparatus organelle subcompartment intracellular membrane-bounded organelle endomembrane system intracellular organelle trans-Golgi network cytoskeleton intracellular non-membrane-bounded organelle non-membrane-bounded organelle neuron spine neuron projection dendritic spine somatodendritic compartment postsynapse dendrite dendritic tree anchoring junction focal adhesion cell-substrate junction pigment granule intracellular vesicle melanosome cytoplasmic vesicle cell periphery cell cortex ruffle plasma membrane leading edge membrane ruffle membrane plasma membrane region cell projection membrane protein-containing complex catalytic complex plasma membrane protein complex NADPH oxidase complex membrane protein complex oxidoreductase complex endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum organelle membrane endoplasmic reticulum membrane cytoplasmic ribonucleoprotein granule supramolecular complex ribonucleoprotein granule endosome membrane endosome recycling endosome cytoplasmic vesicle membrane bounding membrane of organelle recycling endosome membrane vesicle membrane secretory granule secretory vesicle secretory granule membrane ficolin-1-rich granule membrane ficolin-1-rich granule tertiary granule nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR030798	Arfaptin family	Family
A, B	IPR010504	Arfaptin homology (AH) domain	Domain
A, B	IPR027267	AH/BAR domain superfamily	Homologous Superfamily
C [auth D]	IPR003578	Small GTPase Rho	Family
C [auth D]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
C [auth D]	IPR005225	Small GTP-binding domain	Domain
C [auth D]	IPR001806	Small GTPase	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P53365	ductal breast carcinoma in situ invasive ductal breast carcinoma lung cancer
C [auth D]	Pharos: P63000	dilated cardiomyopathy melanoma Cardiotoxicity cutaneous melanoma congestive heart failure diabetes mellitus liver disease malignant glioma osteosarcoma plasma cell myeloma urinary bladder cancer heart disease hepatocellular carcinoma medulloblastoma ovarian cancer dilated cardiomyopathy melanoma Cardiotoxicity cutaneous melanoma congestive heart failure diabetes mellitus liver disease malignant glioma osteosarcoma plasma cell myeloma urinary bladder cancer heart disease hepatocellular carcinoma medulloblastoma ovarian cancer Sjogren syndrome depressive disorder dilated cardiomyopathy 1A heart failure intellectual disability lymphoplasmacytic lymphoma microcephaly pancreatic intraductal papillary-mucinous neoplasm intellectual disability, autosomal dominant 48

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.