Annotations: 1K8K

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1k8ka1	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Actin-like ATPase domain	Actin/HSP70	Actin-related protein 3, Arp3	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1k8kb1	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Actin-like ATPase domain	Actin/HSP70	Actin-related protein 2, Arp2	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
C	d1k8kc_	All beta proteins	7-bladed beta-propeller	WD40 repeat-like	WD40-repeat	Arp2/3 complex 41 kDa subunit ARPC1	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
D	d1k8kd1	Alpha and beta proteins (a+b)	Secretion chaperone-like	Arp2/3 complex subunits	Arp2/3 complex subunits	ARPC2 (34 kDa subunit)	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
E	d1k8ke_	All alpha proteins	Arp2/3 complex 21 kDa subunit ARPC3	Arp2/3 complex 21 kDa subunit ARPC3	Arp2/3 complex 21 kDa subunit ARPC3	Arp2/3 complex 21 kDa subunit ARPC3	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
F	d1k8kf_	Alpha and beta proteins (a+b)	Secretion chaperone-like	Arp2/3 complex subunits	Arp2/3 complex subunits	ARPC4 (20 kDa subunit)	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
G	d1k8kg_	All alpha proteins	alpha-alpha superhelix	Arp2/3 complex 16 kDa subunit ARPC5	Arp2/3 complex 16 kDa subunit ARPC5	Arp2/3 complex 16 kDa subunit ARPC5	(Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Actin/HSP70	8025510	4000313	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Actin-like ATPases	8037889	3000092	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Actin-like ATPases	8037891	3000092	SCOP2 (2022-06-29)
B	SCOP2 Family	Actin/HSP70	8025514	4000313	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Actin-like ATPases	8037893	3000092	SCOP2 (2022-06-29)
C	SCOP2 Family	WD40-repeat	8025516	4002744	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	WD40 repeat-like	8037895	3001694	SCOP2 (2022-06-29)
D	SCOP2 Family	Arp2/3 complex subunits	8025519	4003389	SCOP2 (2022-06-29)
D	SCOP2 Family	Arp2/3 complex subunits	8025520	4003389	SCOP2 (2022-06-29)
D	SCOP2 Superfamily	Arp2/3 complex subunits	8037898	3000751	SCOP2 (2022-06-29)
D	SCOP2 Superfamily	Arp2/3 complex subunits	8037899	3000751	SCOP2 (2022-06-29)
E	SCOP2 Family	Arp2/3 complex 21 kDa subunit ARPC3	8025522	4002866	SCOP2 (2022-06-29)
E	SCOP2 Superfamily	Arp2/3 complex 21 kDa subunit ARPC3	8037901	3001830	SCOP2 (2022-06-29)
F	SCOP2 Family	Arp2/3 complex subunits	8025524	4003389	SCOP2 (2022-06-29)
F	SCOP2 Superfamily	Arp2/3 complex subunits	8037903	3000751	SCOP2 (2022-06-29)
G	SCOP2 Family	Arp2/3 complex 16 kDa subunit ARPC5	8025526	4002906	SCOP2 (2022-06-29)
G	SCOP2 Superfamily	Arp2/3 complex 16 kDa subunit ARPC5	8037905	3001882	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	Actin_1st	e1k8kA1	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: Actin_1st	ECOD (1.6)
A	Actin_2nd	e1k8kA2	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: Actin_2nd	ECOD (1.6)
B	Actin_2nd	e1k8kB1	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: Actin_2nd	ECOD (1.6)
C	ANAPC4_WD40_7	e1k8kC1	A: beta duplicates or obligate multimers	X: beta-propeller-like	H: beta-propeller	T: 7-bladed	F: ANAPC4_WD40_7	ECOD (1.6)
D	P34-Arc_C	e1k8kD2	A: a+b two layers	X: Type III secretory system chaperone-like	H: Arp2/3 complex subunits (From Topology)	T: Arp2/3 complex subunits	F: P34-Arc_C	ECOD (1.6)
D	P34-Arc_N	e1k8kD1	A: a+b two layers	X: Type III secretory system chaperone-like	H: Arp2/3 complex subunits (From Topology)	T: Arp2/3 complex subunits	F: P34-Arc_N	ECOD (1.6)
E	P21-Arc	e1k8kE1	A: alpha bundles	X: Arp2/3 complex 21 kDa subunit ARPC3 (From Topology)	H: Arp2/3 complex 21 kDa subunit ARPC3 (From Topology)	T: Arp2/3 complex 21 kDa subunit ARPC3	F: P21-Arc	ECOD (1.6)
F	ARPC4	e1k8kF1	A: a+b two layers	X: Type III secretory system chaperone-like	H: Arp2/3 complex subunits (From Topology)	T: Arp2/3 complex subunits	F: ARPC4	ECOD (1.6)
G	P16-Arc	e1k8kG1	A: alpha superhelices	X: Repetitive alpha hairpins	H: Arp2/3 complex 16 KDa subunit ARPC5 (From Topology)	T: Arp2/3 complex 16 KDa subunit ARPC5	F: P16-Arc	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.420.40	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A	2.30.36.70	Mainly Beta	Roll	Actin	Chain A, domain 2	CATH (4.3.0)
A	3.90.640.10	Alpha Beta	Alpha-Beta Complex	Actin	Chain A, domain 4	CATH (4.3.0)
B	3.30.420.40	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
B	3.90.640.10	Alpha Beta	Alpha-Beta Complex	Actin	Chain A, domain 4	CATH (4.3.0)
C	2.130.10.10	Mainly Beta	7 Propeller	Methylamine Dehydrogenase	Chain H	CATH (4.3.0)
D	3.30.1460.20	Alpha Beta	2-Layer Sandwich	Yope Regulator	Chain: A,	CATH (4.3.0)
E	1.10.1760.10	Mainly Alpha	Orthogonal Bundle	Arp2/3 complex 21 kDa subunit ARPC3	Actin-related protein 2/3 complex subunit 3	CATH (4.3.0)
F	3.30.1460.20	Alpha Beta	2-Layer Sandwich	Yope Regulator	Chain: A,	CATH (4.3.0)
G	1.25.40.190	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat	Actin-related protein 2/3 complex subunit 5	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00022	Actin (Actin)	Actin	-	Family
B	PF00022	Actin (Actin)	Actin	-	Family
C	PF00400	WD domain, G-beta repeat (WD40)	WD domain, G-beta repeat	-	Repeat
D	PF04045	Arp2/3 complex, 34 kD subunit p34-Arc (P34-Arc)	Arp2/3 complex, 34 kD subunit p34-Arc	-	Family
E	PF04062	ARP2/3 complex ARPC3 (21 kDa) subunit (P21-Arc)	ARP2/3 complex ARPC3 (21 kDa) subunit	-	Family
F	PF05856	ARP2/3 complex 20 kDa subunit (ARPC4) (ARPC4)	ARP2/3 complex 20 kDa subunit (ARPC4)	-	Family
G	PF04699	ARP2/3 complex 16 kDa subunit (p16-Arc) (P16-Arc)	ARP2/3 complex 16 kDa subunit (p16-Arc)	The Arp2/3 protein complex has been implicated in the control of actin polymerisation. The human complex consists of seven subunits which include the actin related proteins Arp2 and Arp3, and five others referred to as p41-Arc, p34-Arc, p21-Arc, p20 ...	The Arp2/3 protein complex has been implicated in the control of actin polymerisation. The human complex consists of seven subunits which include the actin related proteins Arp2 and Arp3, and five others referred to as p41-Arc, p34-Arc, p21-Arc, p20-Arc, and p16-Arc. The precise function of p16-Arc is currently unknown. Its structure consists of a single domain containing a bundle of seven alpha helices [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	ACTIN-LIKE PROTEIN 3	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cytoskeletal protein binding actin binding protein binding	actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization regulation of cellular process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization regulation of cellular process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II heterocycle metabolic process organic substance biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of transcription by RNA polymerase II regulation of biological process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process cellular nitrogen compound metabolic process primary metabolic process regulation of cellular metabolic process positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process positive regulation of DNA-templated transcription cellular biosynthetic process positive regulation of biological process RNA metabolic process positive regulation of cellular metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process positive regulation of biosynthetic process nitrogen compound metabolic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process heterocycle biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process positive regulation of nitrogen compound metabolic process positive regulation of RNA biosynthetic process cellular aromatic compound metabolic process positive regulation of cellular biosynthetic process regulation of cellular component organization positive regulation of cellular component organization cell projection organization plasma membrane bounded cell projection assembly cellular component biogenesis cellular component assembly regulation of lamellipodium assembly regulation of lamellipodium organization positive regulation of cell projection organization lamellipodium assembly plasma membrane bounded cell projection organization positive regulation of cellular component biogenesis regulation of cell projection organization regulation of cell projection assembly positive regulation of lamellipodium assembly regulation of cellular component biogenesis positive regulation of lamellipodium organization regulation of plasma membrane bounded cell projection assembly lamellipodium organization cell projection assembly regulation of plasma membrane bounded cell projection organization positive regulation of plasma membrane bounded cell projection assembly organelle assembly cilium assembly cilium organization	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	ACTIN-LIKE PROTEIN 2	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cytoskeletal protein binding actin binding protein binding	cellular response to stimulus regulation of DNA recombination regulation of cellular process response to stimulus regulation of double-strand break repair regulation of cellular response to stress positive regulation of double-strand break repair via homologous recombination regulation of primary metabolic process nucleobase-containing compound metabolic process regulation of nitrogen compound metabolic process positive regulation of metabolic process positive regulation of DNA repair heterocycle metabolic process positive regulation of macromolecule metabolic process cellular response to stimulus regulation of DNA recombination regulation of cellular process response to stimulus regulation of double-strand break repair regulation of cellular response to stress positive regulation of double-strand break repair via homologous recombination regulation of primary metabolic process nucleobase-containing compound metabolic process regulation of nitrogen compound metabolic process positive regulation of metabolic process positive regulation of DNA repair heterocycle metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process double-strand break repair via homologous recombination positive regulation of DNA recombination double-strand break repair regulation of biological process positive regulation of nucleobase-containing compound metabolic process cellular metabolic process DNA recombination cellular nitrogen compound metabolic process primary metabolic process regulation of cellular metabolic process DNA metabolic process regulation of double-strand break repair via homologous recombination organic cyclic compound metabolic process positive regulation of DNA metabolic process regulation of response to stimulus metabolic process macromolecule metabolic process regulation of metabolic process regulation of DNA metabolic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of response to stimulus organic substance metabolic process cellular response to stress response to stress regulation of response to stress nitrogen compound metabolic process recombinational repair positive regulation of cellular process DNA repair biological regulation regulation of macromolecule metabolic process nucleic acid metabolic process positive regulation of double-strand break repair regulation of DNA repair positive regulation of nitrogen compound metabolic process DNA damage response cellular process cellular aromatic compound metabolic process actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization positive regulation of macromolecule biosynthetic process DNA-templated transcription regulation of RNA metabolic process transcription by RNA polymerase II organic substance biosynthetic process regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II positive regulation of RNA metabolic process regulation of gene expression biosynthetic process aromatic compound biosynthetic process organic cyclic compound biosynthetic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription positive regulation of DNA-templated transcription cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process positive regulation of biosynthetic process regulation of RNA biosynthetic process regulation of biosynthetic process nucleobase-containing compound biosynthetic process heterocycle biosynthetic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process positive regulation of RNA biosynthetic process positive regulation of cellular biosynthetic process regulation of cellular component organization positive regulation of cellular component organization cell projection organization plasma membrane bounded cell projection assembly cellular component biogenesis cellular component assembly regulation of lamellipodium assembly regulation of lamellipodium organization positive regulation of cell projection organization lamellipodium assembly plasma membrane bounded cell projection organization positive regulation of cellular component biogenesis regulation of cell projection organization regulation of cell projection assembly positive regulation of lamellipodium assembly regulation of cellular component biogenesis positive regulation of lamellipodium organization regulation of plasma membrane bounded cell projection assembly lamellipodium organization cell projection assembly regulation of plasma membrane bounded cell projection organization positive regulation of plasma membrane bounded cell projection assembly	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle
C	ARP2/3 COMPLEX 41 KDA SUBUNIT	structural constituent of cytoskeleton structural molecule activity cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding	actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle membrane-bounded organelle nucleus intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle membrane-bounded organelle nucleus intracellular membrane-bounded organelle
D	ARP2/3 COMPLEX 34 KDA SUBUNIT	structural constituent of cytoskeleton structural molecule activity cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding	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 process cellular component organization or biogenesis 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 process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization Arp2/3 complex-mediated actin nucleation actin nucleation	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome membrane-bounded organelle nucleus intracellular membrane-bounded organelle synapse cell junction cell projection neuron projection plasma membrane bounded cell projection
E	ARP2/3 COMPLEX 21 KDA SUBUNIT	cytoskeletal protein binding actin binding protein binding binding	actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process regulation of cellular component size cellular component biogenesis regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly regulation of actin filament polymerization regulation of biological quality protein polymerization actin polymerization or depolymerization regulation of biological process regulation of actin filament organization actin filament polymerization protein-containing complex organization biological regulation 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	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle
F	ARP2/3 COMPLEX 20 KDA SUBUNIT	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding	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 process cellular component organization or biogenesis 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 process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization Arp2/3 complex-mediated actin nucleation actin nucleation	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle
G	ARP2/3 COMPLEX 16 KDA SUBUNIT	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding	actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization cell migration cell motility regulation of cytoskeleton organization actin cytoskeleton organization actin filament organization Arp2/3 complex-mediated actin nucleation cellular component organization organelle organization actin filament-based process cellular process cellular component organization or biogenesis actin nucleation supramolecular fiber organization cytoskeleton organization cell migration cell motility regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process regulation of cellular component size cellular component biogenesis regulation of protein-containing complex assembly cellular component assembly protein-containing complex assembly regulation of actin filament polymerization regulation of biological quality protein polymerization actin polymerization or depolymerization regulation of biological process regulation of actin filament organization actin filament polymerization protein-containing complex organization biological regulation 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	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage intracellular anatomical structure cytoplasm cellular anatomical entity cytosol intracellular organelle Arp2/3 protein complex protein-containing complex cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle site of double-strand break site of DNA damage chromosome cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR020902	Actin/actin-like conserved site	Conserved Site
A	IPR043129	ATPase, nucleotide binding domain	Homologous Superfamily
A	IPR004000	Actin family	Family
B	IPR020902	Actin/actin-like conserved site	Conserved Site
B	IPR043129	ATPase, nucleotide binding domain	Homologous Superfamily
B	IPR004000	Actin family	Family
C	IPR017383	Actin-related protein 2/3 complex subunit 1	Family
C	IPR001680	WD40 repeat	Repeat
C	IPR036322	WD40-repeat-containing domain superfamily	Homologous Superfamily
C	IPR015943	WD40/YVTN repeat-like-containing domain superfamily	Homologous Superfamily
D	IPR034666	Arp2/3 complex subunit 2/4	Homologous Superfamily
D	IPR007188	Actin-related protein 2/3 complex subunit 2	Family
E	IPR036753	Actin-related protein 2/3 complex subunit 3 superfamily	Homologous Superfamily
E	IPR007204	Actin-related protein 2/3 complex subunit 3	Family
F	IPR034666	Arp2/3 complex subunit 2/4	Homologous Superfamily
F	IPR008384	Actin-related protein 2/3 complex subunit 4	Family
G	IPR006789	Actin-related protein 2/3 complex subunit 5	Family
G	IPR036743	Actin-related protein 2/3 complex subunit 5 superfamily	Homologous Superfamily

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.