Annotations: 6W18

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	WD40 repeat-like	8085897	3001694	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Arp2/3 complex subunits	8085061	3000751	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		e6w18A1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.1)
B	Pro_isomerase	e6w18B1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)
C	Pro_isomerase	e6w18C1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)
F	Pro_isomerase	e6w18F1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)
G	Pro_isomerase	e6w18G1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)
E	Pro_isomerase	e6w18E1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)
D	Pro_isomerase	e6w18D1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Pro_isomerase	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00022	Actin (Actin)	Actin	-	Family
C	PF00400	WD domain, G-beta repeat (WD40)	WD domain, G-beta repeat	-	Repeat
E	PF04062	ARP2/3 complex ARPC3 (21 kDa) subunit (P21-Arc)	ARP2/3 complex ARPC3 (21 kDa) subunit	-	Family
D	PF04045	Arp2/3 complex, 34 kD subunit p34-Arc (P34-Arc)	Arp2/3 complex, 34 kD subunit p34-Arc	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Actin-related protein 3	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide 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-containing complex binding protein 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 actin filament branching localization import into cell 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 actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport protein polymerization actin polymerization or depolymerization actin filament polymerization protein-containing complex organization cellular component biogenesis cellular component assembly protein-containing complex assembly actin cortical patch organization cortical actin cytoskeleton organization cortical cytoskeleton organization	cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cytosol cell division site Arp2/3 protein complex protein-containing complex cell tip cell pole cell cortex region cell cortex of cell tip cytoplasmic region
B	Actin-related protein 2	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide 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-containing complex binding protein 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cellular component biogenesis cellular component assembly cortical actin cytoskeleton organization actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport	cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cell division site medial cortex cell cortex region cytoplasmic region Arp2/3 protein complex protein-containing complex cell tip cell pole cell cortex of cell tip
C	Actin-related protein 2/3 complex subunit 1	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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cellular component biogenesis cellular component assembly cortical actin cytoskeleton organization actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport	cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cytosol cell division site Arp2/3 protein complex protein-containing complex
F	Actin-related protein 2/3 complex subunit 4	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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cortical actin cytoskeleton organization actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell cortex cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell cortex cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch Arp2/3 protein complex protein-containing complex membrane-bounded organelle nucleus intracellular membrane-bounded organelle
G	Actin-related protein 2/3 complex subunit 5	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding protein-macromolecule adaptor activity molecular adaptor activity	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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cellular component biogenesis cellular component assembly cortical actin cytoskeleton organization actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process regulation of cellular component size regulation of protein-containing complex 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	cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cellular anatomical structure cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cell projection mating projection cell tip mating projection tip cell pole plasma membrane bounded cell projection site of polarized growth cytosol Arp2/3 protein complex protein-containing complex membrane-bounded organelle nucleus intracellular membrane-bounded organelle
E	Actin-related protein 2/3 complex subunit 3	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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cellular component biogenesis cellular component assembly cortical actin cytoskeleton organization actin filament branching establishment or maintenance of cell polarity localization import into cell transport endocytosis establishment of localization vesicle-mediated transport regulation of cytoskeleton organization regulation of cellular process regulation of cellular component organization regulation of actin filament-based process regulation of cellular component size regulation of protein-containing complex 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	cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cytosol cell division site Arp2/3 protein complex protein-containing complex membrane-bounded organelle nucleus intracellular membrane-bounded organelle
D	Actin-related protein 2/3 complex subunit 2	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural constituent of cytoskeleton structural molecule activity	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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly 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 actin cortical patch organization cortical cytoskeleton organization actin cortical patch assembly cellular component biogenesis cellular component assembly cortical actin cytoskeleton organization actin filament branching localization import into cell transport endocytosis establishment of localization vesicle-mediated transport protein polymerization actin polymerization or depolymerization actin filament polymerization protein-containing complex organization protein-containing complex assembly	cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cellular anatomical structure cell tip cell pole cell cortex intracellular anatomical structure cortical cytoskeleton intracellular membraneless organelle actin cytoskeleton cell periphery intracellular organelle endocytic patch cytoskeleton organelle membraneless organelle cortical actin cytoskeleton actin cortical patch cytoplasm cytosol cell division site Arp2/3 protein complex protein-containing complex 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	IPR036322	WD40-repeat-containing domain superfamily	Homologous Superfamily
C	IPR017383	Actin-related protein 2/3 complex subunit 1	Family
C	IPR001680	WD40 repeat	Repeat
C	IPR015943	WD40/YVTN repeat-like-containing domain superfamily	Homologous Superfamily
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
E	IPR007204	Actin-related protein 2/3 complex subunit 3	Family
E	IPR036753	Actin-related protein 2/3 complex subunit 3 superfamily	Homologous Superfamily
D	IPR034666	Arp2/3 complex subunit 2/4	Homologous Superfamily
D	IPR007188	Actin-related protein 2/3 complex subunit 2	Family

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.