Annotations: 2KXP

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2kxpa_	Multi-domain proteins (alpha and beta)	Subunits of heterodimeric actin filament capping protein Capz	Subunits of heterodimeric actin filament capping protein Capz	Capz alpha-1 subunit	Capz alpha-1 subunit	bantam,chickens (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
B	d2kxpb_	Multi-domain proteins (alpha and beta)	Subunits of heterodimeric actin filament capping protein Capz	Subunits of heterodimeric actin filament capping protein Capz	Capz beta-1 subunit	Capz beta-1 subunit	bantam,chickens (Gallus gallus ) [TaxId: 9031 ],	SCOPe (2.08)
C	d2kxpc_	Alpha and beta proteins (a+b)	beta-hairpin-alpha-hairpin repeat	Ankyrin repeat	Ankyrin repeat	Myotrophin	mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Subunits of heterodimeric actin filament capping protein Capz	8032214	3001499	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Subunits of heterodimeric actin filament capping protein Capz	8032215	3001499	SCOP2B (2022-06-29)
C	SCOP2 Family	Ankyrin repeat	8081102	4000366	SCOP2 (2022-06-29)
C	SCOP2 Superfamily	Ankyrin repeat	8081103	3000154	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	PF01267	e2kxpA1	A: alpha bundles	X: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz (From Topology)	H: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz (From Topology)	T: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz	F: PF01267	ECOD (1.6)
A	PF01267	e2kxpA2	A: a+b two layers	X: a+b domain in Capz (From Topology)	H: a+b domain in Capz (From Topology)	T: a+b domain in Capz	F: PF01267	ECOD (1.6)
A	PF01267	e2kxpA3	A: few secondary structure elements	X: beta-barrel domain in Capz (From Topology)	H: beta-barrel domain in Capz (From Topology)	T: beta-barrel domain in Capz	F: PF01267	ECOD (1.6)
B	PF01115	e2kxpB3	A: alpha bundles	X: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz (From Topology)	H: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz (From Topology)	T: alpha-helical domain in subunits of heterodimeric actin filament capping protein Capz	F: PF01115	ECOD (1.6)
B	PF01115	e2kxpB2	A: a+b two layers	X: a+b domain in Capz (From Topology)	H: a+b domain in Capz (From Topology)	T: a+b domain in Capz	F: PF01115	ECOD (1.6)
B	PF01115	e2kxpB1	A: few secondary structure elements	X: beta-barrel domain in Capz (From Topology)	H: beta-barrel domain in Capz (From Topology)	T: beta-barrel domain in Capz	F: PF01115	ECOD (1.6)
C	PF13637	e2kxpC1	A: alpha superhelices	X: Repetitive alpha hairpins	H: Ankyrin repeat (From Topology)	T: Ankyrin repeat	F: PF13637	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.1140.60	Alpha Beta	2-Layer Sandwich	Ribosomal protein S3 C-terminal domain	F-actin capping protein, alpha subunit	CATH (4.3.0)
A	3.90.1150.210	Alpha Beta	Alpha-Beta Complex	Aspartate Aminotransferase, domain 1	F-actin capping protein, beta subunit	CATH (4.3.0)
B	1.20.58.570	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
B	3.90.1150.210	Alpha Beta	Alpha-Beta Complex	Aspartate Aminotransferase, domain 1	F-actin capping protein, beta subunit	CATH (4.3.0)
B	6.10.250.30	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces	Capz alpha-1 subunit	CATH (4.3.0)
C	1.25.40.20	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat	Ankyrin repeat-containing domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01267	F-actin capping protein alpha subunit (F-actin_cap_A)	F-actin capping protein alpha subunit	-	Family
B	PF01115	F-actin capping protein, beta subunit (F_actin_cap_B)	F-actin capping protein, beta subunit	-	Family
C	PF12796	Ankyrin repeats (3 copies) (Ank_2)	Ankyrin repeats (3 copies)	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	F-actin-capping protein subunit alpha-1	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding	cellular component organization cellular component biogenesis cell junction organization cellular component assembly cell junction assembly cellular process cellular component organization or biogenesis regulation of cellular process regulation of cellular component size negative regulation of biological process protein-containing complex disassembly regulation of protein-containing complex disassembly actin filament depolymerization regulation of actin filament depolymerization cellular component organization cellular component biogenesis cell junction organization cellular component assembly cell junction assembly cellular process cellular component organization or biogenesis regulation of cellular process regulation of cellular component size negative regulation of biological process protein-containing complex disassembly regulation of protein-containing complex disassembly actin filament depolymerization regulation of actin filament depolymerization actin filament capping actin filament-based process negative regulation of supramolecular fiber organization regulation of biological quality negative regulation of actin filament polymerization cellular component disassembly regulation of biological process barbed-end actin filament capping negative regulation of cellular component organization actin filament organization regulation of organelle organization negative regulation of protein depolymerization negative regulation of protein-containing complex assembly regulation of protein polymerization regulation of supramolecular fiber organization supramolecular fiber organization regulation of cytoskeleton organization regulation of cellular component organization regulation of actin filament-based process regulation of protein-containing complex assembly negative regulation of protein-containing complex disassembly negative regulation of cellular process protein-containing complex assembly negative regulation of protein polymerization regulation of actin filament polymerization actin polymerization or depolymerization protein polymerization regulation of actin filament organization actin cytoskeleton organization actin filament polymerization protein-containing complex organization regulation of protein depolymerization negative regulation of cytoskeleton organization biological regulation regulation of actin polymerization or depolymerization regulation of cellular component biogenesis organelle organization negative regulation of organelle organization regulation of actin filament length regulation of actin cytoskeleton organization negative regulation of actin filament depolymerization protein depolymerization cytoskeleton organization regulation of anatomical structure size	protein-containing complex intracellular anatomical structure WASH complex cytoplasm cellular anatomical entity Z disc sarcomere intracellular organelle I band organelle intracellular non-membrane-bounded organelle contractile muscle fiber supramolecular fiber myofibril protein-containing complex intracellular anatomical structure WASH complex cytoplasm cellular anatomical entity Z disc sarcomere intracellular organelle I band organelle intracellular non-membrane-bounded organelle contractile muscle fiber supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle cytoskeleton F-actin capping protein complex actin cytoskeleton cytosol cell periphery plasma membrane membrane
B	F-actin-capping protein subunit beta isoforms 1 and 2	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament 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 developmental process anatomical structure morphogenesis regulation of biological 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 developmental process anatomical structure morphogenesis regulation of biological process regulation of developmental process anatomical structure development biological regulation cell morphogenesis regulation of cell morphogenesis regulation of anatomical structure morphogenesis filopodium assembly regulation of cellular component organization regulation of cellular process negative regulation of filopodium assembly negative regulation of biological process regulation of filopodium assembly negative regulation of plasma membrane bounded cell projection assembly negative regulation of cellular process negative regulation of cell projection organization negative regulation of cellular component organization regulation of cell projection organization regulation of cell projection assembly regulation of cellular component biogenesis regulation of plasma membrane bounded cell projection assembly regulation of plasma membrane bounded cell projection organization organelle organization cytoskeleton organization regulation of lamellipodium assembly regulation of lamellipodium organization regulation of cellular component size protein-containing complex disassembly regulation of protein-containing complex disassembly actin filament depolymerization regulation of actin filament depolymerization actin filament capping actin filament-based process negative regulation of supramolecular fiber organization regulation of biological quality negative regulation of actin filament polymerization cellular component disassembly barbed-end actin filament capping actin filament organization regulation of organelle organization negative regulation of protein depolymerization negative regulation of protein-containing complex assembly regulation of protein polymerization regulation of supramolecular fiber organization supramolecular fiber organization regulation of cytoskeleton organization regulation of actin filament-based process regulation of protein-containing complex assembly negative regulation of protein-containing complex disassembly protein-containing complex assembly negative regulation of protein polymerization regulation of actin filament polymerization actin polymerization or depolymerization protein polymerization regulation of actin filament organization actin cytoskeleton organization actin filament polymerization protein-containing complex organization regulation of protein depolymerization negative regulation of cytoskeleton organization regulation of actin polymerization or depolymerization negative regulation of organelle organization regulation of actin filament length regulation of actin cytoskeleton organization negative regulation of actin filament depolymerization protein depolymerization regulation of anatomical structure size	cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium protein-containing complex intracellular anatomical structure WASH complex cytoplasm membrane Z disc sarcomere intracellular organelle I band cell projection cell leading edge cellular anatomical entity plasma membrane bounded cell projection lamellipodium protein-containing complex intracellular anatomical structure WASH complex cytoplasm membrane Z disc sarcomere intracellular organelle I band organelle intracellular non-membrane-bounded organelle contractile muscle fiber supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle cytosol cluster of actin-based cell projections brush border membrane-bounded organelle sperm connecting piece cilium 9+2 motile cilium sperm flagellum motile cilium neuron to neuron synapse synapse cell junction hippocampal mossy fiber to CA3 synapse cytoskeleton F-actin capping protein complex actin cytoskeleton postsynaptic density postsynapse postsynaptic specialization asymmetric synapse Schaffer collateral - CA1 synapse cell cortex cortical cytoskeleton cell periphery
C	Myotrophin	sequence-specific DNA binding DNA binding binding organic cyclic compound binding nucleic acid binding	regulation of biological process regulation of growth regulation of cellular process regulation of cellular component organization positive regulation of biological process biological regulation growth positive regulation of cell growth regulation of cell growth cell growth cellular component organization positive regulation of growth cellular process cellular component organization or biogenesis regulation of biological process regulation of growth regulation of cellular process regulation of cellular component organization positive regulation of biological process biological regulation growth positive regulation of cell growth regulation of cell growth cell growth cellular component organization positive regulation of growth cellular process cellular component organization or biogenesis positive regulation of cellular process organonitrogen compound metabolic process positive regulation of protein metabolic process regulation of protein metabolic process primary metabolic process regulation of macromolecule metabolic process regulation of primary metabolic process positive regulation of metabolic process organic substance metabolic process metabolic process positive regulation of macromolecule metabolic process protein metabolic process macromolecule metabolic process regulation of metabolic process organic cyclic compound metabolic process amine metabolic process catecholamine metabolic process phenol-containing compound metabolic process organic hydroxy compound metabolic process catechol-containing compound metabolic process biogenic amine metabolic process positive regulation of DNA-binding transcription factor activity cellular biosynthetic process positive regulation of NF-kappaB transcription factor activity RNA metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process positive regulation of molecular function nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process cellular metabolic process regulation of cellular metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process regulation of molecular function regulation of gene expression biosynthetic process regulation of DNA-binding transcription factor activity organic cyclic compound biosynthetic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription cellular response to stimulus response to stimulus response to mechanical stimulus response to external stimulus response to abiotic stimulus cellular response to mechanical stimulus cellular response to abiotic stimulus cellular response to external stimulus cellular response to environmental stimulus positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of biosynthetic process positive regulation of cellular biosynthetic process muscle hypertrophy regulation of muscle adaptation multicellular organismal process system process positive regulation of cardiac muscle hypertrophy regulation of system process striated muscle hypertrophy regulation of muscle system process muscle system process regulation of cardiac muscle hypertrophy regulation of muscle hypertrophy muscle adaptation regulation of response to stimulus positive regulation of muscle hypertrophy cardiac muscle hypertrophy positive regulation of multicellular organismal process regulation of multicellular organismal process regulation of cellular component size regulation of biological quality regulation of cell size regulation of anatomical structure size developmental process tissue regeneration skeletal muscle tissue regeneration developmental growth anatomical structure development regeneration muscle structure development cellular developmental process cell differentiation striated muscle cell differentiation muscle cell differentiation negative regulation of biological process protein-containing complex disassembly regulation of protein-containing complex disassembly actin filament depolymerization cellular component biogenesis regulation of actin filament depolymerization actin filament capping cellular component assembly actin filament-based process negative regulation of supramolecular fiber organization negative regulation of actin filament polymerization cellular component disassembly barbed-end actin filament capping negative regulation of cellular component organization actin filament organization regulation of organelle organization negative regulation of protein depolymerization negative regulation of protein-containing complex assembly regulation of protein polymerization regulation of supramolecular fiber organization regulation of barbed-end actin filament capping supramolecular fiber organization regulation of cytoskeleton organization regulation of actin filament-based process regulation of protein-containing complex assembly negative regulation of protein-containing complex disassembly protein-containing complex assembly negative regulation of cellular process negative regulation of protein polymerization regulation of actin filament polymerization protein polymerization actin polymerization or depolymerization regulation of actin filament organization actin filament polymerization actin cytoskeleton organization protein-containing complex organization regulation of protein depolymerization negative regulation of cytoskeleton organization regulation of actin polymerization or depolymerization regulation of cellular component biogenesis organelle organization negative regulation of organelle organization regulation of actin filament length regulation of actin cytoskeleton organization negative regulation of actin filament depolymerization protein depolymerization cytoskeleton organization cerebellar cortex morphogenesis hindbrain morphogenesis neurogenesis multicellular organism development central nervous system neuron differentiation cerebellar granular layer morphogenesis neuron differentiation metencephalon development cerebellar cortex formation system development cerebellum morphogenesis head development animal organ development brain development cerebellar granular layer development nervous system development glutamatergic neuron differentiation generation of neurons cerebellar cortex development anatomical structure morphogenesis cerebellum development central nervous system development cerebellar granule cell differentiation anatomical structure formation involved in morphogenesis hindbrain development cerebellar granular layer formation cell differentiation in hindbrain	intracellular organelle protein-containing complex intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle F-actin capping protein complex cellular anatomical entity actin cytoskeleton non-membrane-bounded organelle cytoplasm cytosol perinuclear region of cytoplasm axon intracellular organelle protein-containing complex intracellular anatomical structure cytoskeleton organelle intracellular non-membrane-bounded organelle F-actin capping protein complex cellular anatomical entity actin cytoskeleton non-membrane-bounded organelle cytoplasm cytosol perinuclear region of cytoplasm axon cell projection neuron projection plasma membrane bounded cell projection membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002189	F-actin-capping protein subunit alpha	Family
A	IPR042489	F-actin capping protein, alpha subunit, domain 1	Homologous Superfamily
A	IPR037282	F-actin-capping protein subunit alpha/beta	Homologous Superfamily
A	IPR017865	F-actin capping protein, alpha subunit, conserved site	Conserved Site
A	IPR042276	F-actin-capping protein subunit alpha/beta, domain 2	Homologous Superfamily
B	IPR001698	F-actin-capping protein subunit beta	Family
B	IPR019771	F-actin capping protein, beta subunit, conserved site	Conserved Site
B	IPR043175	F-actin-capping protein subunit beta, N-terminal domain	Homologous Superfamily
B	IPR037282	F-actin-capping protein subunit alpha/beta	Homologous Superfamily
B	IPR042276	F-actin-capping protein subunit alpha/beta, domain 2	Homologous Superfamily
C	IPR002110	Ankyrin repeat	Repeat
C	IPR036770	Ankyrin repeat-containing domain 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.