1T44 | pdb_00001t44

Structural basis of actin sequestration by thymosin-B4: Implications for arp2/3 activation

External Resource: Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth A]	d1t44a1	Alpha and beta proteins (a/b)	Ribonuclease H-like motif	Actin-like ATPase domain	Actin/HSP70	Actin	(Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
A [auth G]	d1t44g_	Alpha and beta proteins (a+b)	Gelsolin-like	Actin depolymerizing proteins	Gelsolin-like	Gelsolin	human, house mouse (Homo sapiens ) [TaxId: 9606 ], human, house 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)
B [auth A]	SCOP2B Superfamily	Actin-like ATPases	8040506	3000092	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Actin-like ATPases	8040509	3000092	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)
B [auth A]	Hexokinase_2	e1t44A1	A: alpha bundles	X: HTH	H: HTH	T: winged helix domain	F: Hexokinase_2	ECOD (develop294)
A [auth G]	NTP_transf_2, PAP_NTPase	e1t44G1	A: alpha bundles	X: EGF-like	H: LDL receptor-like module	T: LDL receptor-like module	F: NTP_transf_2, PAP_NTPase	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	3.30.420.40	Alpha Beta	2-Layer Sandwich	Nucleotidyltransferase	domain 5	CATH (4.3.0)
B [auth A]	2.30.36.70	Mainly Beta	Roll	Actin	Chain A, domain 2	CATH (4.3.0)
B [auth A]	3.90.640.10	Alpha Beta	Alpha-Beta Complex	Actin	Chain A, domain 4	CATH (4.3.0)
A [auth G]	3.40.20.10	Alpha Beta	3-Layer(aba) Sandwich	Severin	Severin	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth A]	PF00022	Actin (Actin)	Actin	-	Family
A [auth G]	PF01290	Thymosin beta-4 family (Thymosin)	Thymosin beta-4 family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth A]	Actin, alpha	cytoskeletal protein binding titin binding protein binding binding cation binding ion binding calcium ion binding metal ion binding small molecule binding protein domain specific binding hydrolase activity catalytic activity troponin I binding cytoskeletal motor activator activity cytoskeletal protein binding titin binding protein binding binding cation binding ion binding calcium ion binding metal ion binding small molecule binding protein domain specific binding hydrolase activity catalytic activity troponin I binding cytoskeletal motor activator activity cytoskeletal motor regulator activity molecular function activator activity molecular function regulator activity magnesium ion binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding myosin heavy chain binding myosin binding tropomyosin binding calcium-dependent protein binding identical protein binding actin monomer binding actin 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 striated muscle tissue development muscle structure development skeletal muscle organ development striated muscle cell development muscle cell development cell differentiation cellular process muscle tissue development muscle organ development striated muscle cell differentiation regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process cellular component assembly involved in morphogenesis skeletal myofibril assembly membraneless organelle assembly cellular component organization cellular component biogenesis 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 protein polymerization actin polymerization or depolymerization actin filament polymerization protein-containing complex organization protein-containing complex assembly actin filament bundle organization actin filament bundle assembly	intracellular anatomical structure skeletal muscle myofibril intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex cell projection intracellular anatomical structure skeletal muscle myofibril intracellular membraneless organelle intracellular organelle cellular anatomical structure organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex cell projection cell leading edge plasma membrane bounded cell projection lamellipodium cytoskeleton actin filament bundle actin cytoskeleton actomyosin stress fiber contractile actin filament bundle polymeric cytoskeletal fiber actin filament protein-containing complex filamentous actin cell body striated muscle thin filament myofilament sarcomere actin-based cell projection filopodium
A [auth G]	Chimera of Gelsolin domain 1 and C-Terminal domain of thymosin Beta-4	actin monomer sequestering activity molecular sequestering activity protein sequestering activity protein binding binding enzyme binding cytoskeletal protein binding actin monomer binding actin binding	cellular response to stimulus positive regulation of locomotion regulation of cell motility regulation of cellular process response to stimulus regulation of response to external stimulus endothelial cell migration positive regulation of biological process positive regulation of chemotaxis positive regulation of cell migration positive regulation of response to stimulus positive regulation of response to external stimulus taxis positive regulation of cell motility regulation of cell migration cellular response to stimulus positive regulation of locomotion regulation of cell motility regulation of cellular process response to stimulus regulation of response to external stimulus endothelial cell migration positive regulation of biological process positive regulation of chemotaxis positive regulation of cell migration positive regulation of response to stimulus positive regulation of response to external stimulus taxis positive regulation of cell motility regulation of cell migration positive regulation of endothelial cell chemotaxis regulation of endothelial cell migration cell migration endothelial cell chemotaxis cell motility locomotion positive regulation of cellular process cell chemotaxis chemotaxis regulation of biological process regulation of endothelial cell chemotaxis biological regulation response to external stimulus regulation of chemotaxis cellular response to chemical stimulus regulation of response to stimulus response to chemical regulation of locomotion positive regulation of endothelial cell migration cellular process regulation of blood vessel endothelial cell migration positive regulation of blood vessel endothelial cell migration blood vessel endothelial cell migration signaling negative regulation of signaling negative regulation of intracellular signal transduction negative regulation of biological process negative regulation of canonical NF-kappaB signal transduction regulation of signal transduction intracellular signal transduction negative regulation of cell communication cell communication regulation of intracellular signal transduction intracellular signaling cassette negative regulation of cellular process signal transduction regulation of signaling negative regulation of response to stimulus negative regulation of signal transduction canonical NF-kappaB signal transduction regulation of cell communication regulation of canonical NF-kappaB signal transduction positive regulation of DNA-templated transcription RNA metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process positive regulation of metabolic process DNA-templated transcription regulation of RNA metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process regulation of gene expression biosynthetic process positive regulation of RNA biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process cell surface receptor signaling pathway response to cytokine cytokine-mediated signaling pathway response to peptide cellular response to tumor necrosis factor tumor necrosis factor-mediated signaling pathway cellular response to cytokine stimulus response to tumor necrosis factor regulation of defense response negative regulation of inflammatory response defense response regulation of inflammatory response response to stress negative regulation of response to external stimulus regulation of response to stress negative regulation of defense response inflammatory response nucleotide biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process positive regulation of phosphate metabolic process purine ribonucleoside triphosphate biosynthetic process positive regulation of nucleotide biosynthetic process regulation of nucleotide biosynthetic process regulation of ATP metabolic process ribonucleotide biosynthetic process purine nucleoside triphosphate biosynthetic process regulation of small molecule metabolic process positive regulation of purine nucleotide biosynthetic process regulation of nucleotide metabolic process phosphate-containing compound metabolic process small molecule metabolic process phosphorus metabolic process ribose phosphate biosynthetic process nucleoside phosphate metabolic process positive regulation of phosphorus metabolic process nucleotide metabolic process regulation of purine nucleotide metabolic process ribonucleoside triphosphate biosynthetic process positive regulation of ATP metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process regulation of phosphorus metabolic process nucleoside triphosphate metabolic process purine ribonucleotide metabolic process purine nucleotide biosynthetic process ribose phosphate metabolic process ATP metabolic process ATP biosynthetic process positive regulation of nucleotide metabolic process purine nucleotide metabolic process ribonucleotide metabolic process nucleobase-containing small molecule metabolic process purine ribonucleoside triphosphate metabolic process purine-containing compound biosynthetic process purine nucleoside triphosphate metabolic process carbohydrate derivative biosynthetic process regulation of purine nucleotide biosynthetic process nucleoside triphosphate biosynthetic process purine-containing compound metabolic process positive regulation of purine nucleotide metabolic process positive regulation of ATP biosynthetic process regulation of ATP biosynthetic process organophosphate metabolic process positive regulation of small molecule metabolic process developmental process smooth muscle cell differentiation cellular developmental process regulation of developmental process positive regulation of smooth muscle cell differentiation regulation of smooth muscle cell differentiation regulation of cell differentiation muscle cell differentiation positive regulation of muscle cell differentiation muscle structure development positive regulation of developmental process regulation of muscle cell differentiation positive regulation of cell differentiation cell differentiation anatomical structure development cellular component organization organelle organization actin cytoskeleton organization actin filament organization actin filament-based process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization negative regulation of stem cell differentiation negative regulation of hematopoietic progenitor cell differentiation cell development regulation of stem cell differentiation hematopoietic stem cell differentiation negative regulation of hematopoietic stem cell differentiation negative regulation of cell differentiation regulation of hematopoietic progenitor cell differentiation hemopoiesis negative regulation of developmental process regulation of hematopoietic stem cell differentiation stem cell differentiation hematopoietic progenitor cell differentiation positive regulation of smooth muscle cell migration regulation of smooth muscle cell migration smooth muscle cell migration muscle cell migration regulation of cytoskeleton organization 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 negative regulation of protein polymerization regulation of actin filament polymerization regulation of biological quality negative regulation of supramolecular fiber organization negative regulation of actin filament polymerization protein polymerization actin polymerization or depolymerization regulation of actin filament organization actin filament polymerization negative regulation of cellular component organization protein-containing complex organization negative regulation of cytoskeleton organization regulation of actin polymerization or depolymerization regulation of cellular component biogenesis regulation of organelle organization negative regulation of protein-containing complex assembly negative 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 organelle cellular anatomical structure intracellular anatomical structure cytoskeleton organelle membraneless organelle intracellular membraneless organelle cytoplasm cytosol membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth A]	IPR020902	Actin/actin-like conserved site	Conserved Site
B [auth A]	IPR043129	ATPase, nucleotide binding domain	Homologous Superfamily
B [auth A]	IPR004001	Actin, conserved site	Conserved Site
B [auth A]	IPR004000	Actin family	Family
A [auth G]	IPR001152	Beta-thymosin	Family
A [auth G]	IPR038386	Beta-thymosin superfamily	Homologous Superfamily

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.