4B1U

Structure of the Phactr1 RPEL domain and RPEL motif directed assemblies with G-actin reveal the molecular basis for actin binding cooperativity.

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth B]	SCOP2 Family	Actin/HSP70	8082540	4000313	SCOP2 (2022-06-29)
A [auth B]	SCOP2 Superfamily	Actin-like ATPases	8082541	3000092	SCOP2 (2022-06-29)
A [auth B]	SCOP2 Superfamily	Actin-like ATPases	8092419	3000092	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 [auth B]	PF00022	e4b1uB1	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: PF00022	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth B]	3.30.420.40	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
A [auth B]	3.90.640.10	Alpha Beta	Alpha-Beta Complex	Actin	Chain A, domain 4	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B]	PF00022	Actin (Actin)	Actin	-	Family
B [auth M]	PF02755	RPEL repeat (RPEL)	RPEL repeat	-	Disordered

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B]	ACTIN, ALPHA SKELETAL MUSCLE	hydrolase activity catalytic activity 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 hydrolase activity catalytic activity 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	developmental process mesenchyme migration multicellular organismal process mesenchyme morphogenesis animal organ development mesenchyme development tissue development tissue morphogenesis anatomical structure morphogenesis tissue migration anatomical structure development animal organ morphogenesis myotube cell development skeletal muscle fiber development developmental process mesenchyme migration multicellular organismal process mesenchyme morphogenesis animal organ development mesenchyme development tissue development tissue morphogenesis anatomical structure morphogenesis tissue migration anatomical structure development animal organ morphogenesis myotube cell development skeletal muscle fiber development cellular developmental process skeletal muscle tissue development cell development muscle cell differentiation myotube differentiation muscle structure development skeletal muscle organ development muscle cell development cell differentiation cellular process muscle tissue development muscle organ development striated muscle cell differentiation regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process organic substance metabolic process positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular biosynthetic process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly skeletal myofibril assembly cellular component organization cellular component biogenesis striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly actin filament-based process cellular component organization or biogenesis skeletal muscle thin filament assembly actin cytoskeleton organization actomyosin structure organization organelle assembly actin filament organization organelle organization myofibril assembly anatomical structure formation involved in morphogenesis supramolecular fiber organization cytoskeleton organization response to stimulus response to mechanical stimulus response to abiotic stimulus response to external stimulus cellular response to stimulus striated muscle adaptation system process muscle adaptation skeletal muscle adaptation skeletal muscle fiber adaptation muscle system process response to organic substance response to lipid response to hormone response to steroid hormone response to chemical response to endogenous stimulus response to organic cyclic compound cellular response to nitrogen compound response to organonitrogen compound response to nitrogen compound cellular response to endogenous stimulus cellular response to chemical stimulus cellular response to organonitrogen compound cellular response to organic substance	cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium intracellular organelle intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle cytoplasm protein-containing complex cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium intracellular organelle intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle actin cytoskeleton non-membrane-bounded organelle cytoplasm protein-containing complex sarcomere contractile muscle fiber supramolecular fiber myofibril supramolecular polymer supramolecular complex actin filament bundle actomyosin stress fiber contractile actin filament bundle polymeric cytoskeletal fiber actin filament cell body striated muscle thin filament myofilament actin-based cell projection filopodium
B [auth M]	PHOSPHATASE AND ACTIN REGULATOR 1	enzyme regulator activity phosphatase inhibitor activity molecular function inhibitor activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity protein phosphatase inhibitor activity enzyme inhibitor activity protein phosphatase binding phosphatase binding protein phosphatase 1 binding protein binding binding enzyme binding enzyme regulator activity phosphatase inhibitor activity molecular function inhibitor activity phosphatase regulator activity molecular function regulator activity protein phosphatase regulator activity protein phosphatase inhibitor activity enzyme inhibitor activity protein phosphatase binding phosphatase binding protein phosphatase 1 binding protein binding binding enzyme binding cytoskeletal protein binding actin binding	multicellular organismal process cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis cellular component organization neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis dendrite development cell differentiation multicellular organismal process cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis cellular component organization neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis dendrite development cell differentiation anatomical structure development cellular component organization or biogenesis system development developmental process plasma membrane bounded cell projection organization dendrite arborization dendrite morphogenesis nervous system development cell morphogenesis involved in neuron differentiation generation of neurons anatomical structure morphogenesis neuron projection arborization neuron development cellular process regulation of biological process regulation of cellular process phosphorylation cellular metabolic process biological regulation regulation of cellular metabolic process regulation of phosphate metabolic process phosphate-containing compound metabolic process regulation of phosphorylation regulation of phosphorus metabolic process metabolic process phosphorus metabolic process regulation of metabolic process head development forebrain development animal organ development brain development pallium development cerebral cortex development central nervous system development telencephalon development actomyosin structure organization actin cytoskeleton organization actin filament organization cellular component biogenesis organelle organization cellular component assembly actin filament bundle organization contractile actin filament bundle assembly actin filament-based process actin filament bundle assembly stress fiber assembly supramolecular fiber organization cytoskeleton organization cell motility regulation of cell motility neuron migration regulation of neuron migration regulation of locomotion regulation of cell migration cell migration locomotion	synapse cell junction cellular anatomical entity intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B]	IPR020902	Actin/actin-like conserved site	Conserved Site
A [auth B]	IPR043129	ATPase, nucleotide binding domain	Homologous Superfamily
A [auth B]	IPR004001	Actin, conserved site	Conserved Site
A [auth B]	IPR004000	Actin family	Family
B [auth M]	IPR004018	RPEL repeat	Repeat

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.