6TKO | pdb_00006tko

Phosphorylated turkey beta1 adrenoceptor with bound agonist formoterol coupled to arrestin-2 in lipid nanodisc.

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: mpstruc
Protein Modification Annotation

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	G protein-coupled receptor-like	8091152	3000473	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)
D [auth L]	C1-set_4	e6tkoL2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_4	ECOD (1.6)
D [auth L]	V-set	e6tkoL1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set	ECOD (1.6)
C [auth H]	C1-set_1	e6tkoH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set_1	ECOD (1.6)
C [auth H]	V-set_10	e6tkoH2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_10	ECOD (1.6)
B	Arrestin_C	e6tkoB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Arrestin_C	ECOD (1.6)
B	Arrestin_N	e6tkoB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Arrestin_N	ECOD (1.6)
A	7tm_1_3	e6tkoA1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: 7tm_1_3	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	1.20.1070.10	Mainly Alpha	Up-down Bundle	Rhopdopsin 7-helix transmembrane proteins	Rhodopsin 7-helix transmembrane proteins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth L]	Light Chain	IGKV1	Kappa	beta-arrestin-1 \| beta-1 adrenergic receptor	SAbDab (2025-12-19)
C [auth H]	Heavy Chain	IGHV3	-	beta-arrestin-1 \| beta-1 adrenergic receptor	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF00339	Arrestin (or S-antigen), N-terminal domain (Arrestin_N)	Arrestin (or S-antigen), N-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with C-terminal domain.	Domain
B	PF02752	Arrestin (or S-antigen), C-terminal domain (Arrestin_C)	Arrestin (or S-antigen), C-terminal domain	Ig-like beta-sandwich fold. Scop reports duplication with N-terminal domain.	Domain
A	PF00001	7 transmembrane receptor (rhodopsin family) (7tm_1)	7 transmembrane receptor (rhodopsin family)	This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GC ...	This family contains, amongst other G-protein-coupled receptors (GCPRs), members of the opsin family, which have been considered to be typical members of the rhodopsin superfamily. They share several motifs, mainly the seven transmembrane helices, GCPRs of the rhodopsin superfamily. All opsins bind a chromophore, such as 11-cis-retinal. The function of most opsins other than the photoisomerases is split into two steps: light absorption and G-protein activation. Photoisomerases, on the other hand, are not coupled to G-proteins - they are thought to generate and supply the chromophore that is used by visual opsins [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth L]	Fab30 light chain	-	-	-
C [auth H]	Fab30 heavy chain	-	-	-
B	Beta-arrestin-1	protein binding binding arrestin family protein binding GTPase regulator activity enzyme regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity molecular function regulator activity angiotensin receptor binding signaling receptor binding G protein-coupled receptor binding molecular adaptor activity protein binding binding arrestin family protein binding GTPase regulator activity enzyme regulator activity enzyme activator activity GTPase activator activity molecular function activator activity nucleoside-triphosphatase regulator activity molecular function regulator activity angiotensin receptor binding signaling receptor binding G protein-coupled receptor binding molecular adaptor activity ubiquitin protein ligase binding ubiquitin-like protein ligase binding enzyme binding insulin-like growth factor receptor binding molecular function inhibitor activity enzyme inhibitor activity transcription coactivator activity transcription regulator activity transcription coregulator activity protein-macromolecule adaptor activity	interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation interleukin-6 production multicellular organismal process regulation of cellular process negative regulation of biological process regulation of interleukin-6 production regulation of cytokine production cytokine production negative regulation of cellular process regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of interleukin-6 production negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process negative regulation of post-translational protein modification regulation of protein modification process regulation of protein ubiquitination regulation of primary metabolic process protein ubiquitination negative regulation of protein modification process protein metabolic process negative regulation of protein ubiquitination regulation of protein modification by small protein conjugation or removal protein modification process negative regulation of protein metabolic process negative regulation of protein modification by small protein conjugation or removal regulation of post-translational protein modification regulation of protein metabolic process primary metabolic process macromolecule modification post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal actomyosin structure organization actin cytoskeleton organization actin filament organization cellular component 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 cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization catabolic process proteolysis involved in protein catabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process muscle hypertrophy regulation of muscle adaptation system process positive regulation of cardiac muscle hypertrophy response to stimulus regulation of system process positive regulation of biological 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 negative regulation of interleukin-8 production interleukin-8 production regulation of interleukin-8 production positive regulation of DNA-templated transcription RNA metabolic process positive regulation of macromolecule biosynthetic 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 transcription by RNA polymerase II positive regulation of biosynthetic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of cellular process regulation of RNA biosynthetic process regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II nucleobase-containing compound biosynthetic process nucleic acid metabolic process positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process regulation of DNA-templated transcription cellular response to stimulus negative adaptation of signaling pathway import into cell receptor internalization negative regulation of signaling signaling transport desensitization of G protein-coupled receptor signaling pathway regulation of signal transduction negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication vesicle-mediated transport cell communication localization signal transduction regulation of G protein-coupled receptor signaling pathway G protein-coupled receptor internalization regulation of signaling negative regulation of response to stimulus negative regulation of signal transduction establishment of localization adaptation of signaling pathway regulation of cell communication G protein-coupled receptor signaling pathway receptor-mediated endocytosis endocytosis positive regulation of cell communication positive regulation of signal transduction intracellular signal transduction positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction intracellular signaling cassette positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade MAPK cascade ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling establishment of protein localization nitrogen compound transport protein transport macromolecule localization intracellular protein localization regulation of localization regulation of cellular component organization positive regulation of cellular component organization regulation of receptor internalization positive regulation of endocytosis positive regulation of receptor-mediated endocytosis regulation of endocytosis regulation of transport regulation of receptor-mediated endocytosis regulation of vesicle-mediated transport positive regulation of receptor internalization positive regulation of transport small GTPase-mediated signal transduction regulation of small GTPase mediated signal transduction Rho protein signal transduction regulation of Rho protein signal transduction positive regulation of Rho protein signal transduction positive regulation of small GTPase mediated signal transduction proteasomal protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process negative regulation of DNA-binding transcription factor activity negative regulation of NF-kappaB transcription factor activity negative regulation of molecular function regulation of molecular function regulation of DNA-binding transcription factor activity cell surface receptor signaling pathway Notch signaling pathway negative regulation of Notch signaling pathway regulation of Notch signaling pathway positive regulation of phosphorylation regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process positive regulation of protein modification process phosphate-containing compound metabolic process positive regulation of protein phosphorylation phosphorus metabolic process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of phosphorus metabolic process regulation of phosphorylation	cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection clathrin-coated pit membrane endomembrane system intracellular anatomical structure cytoplasm cytosol intracellular organelle organelle membraneless organelle intracellular membraneless organelle cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection clathrin-coated pit membrane endomembrane system intracellular anatomical structure cytoplasm cytosol intracellular organelle organelle membraneless organelle intracellular membraneless organelle chromatin chromosome membrane-bounded organelle intracellular vesicle intracellular membrane-bounded organelle cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane endocytic vesicle membrane vesicle organelle membrane endocytic vesicle vacuolar membrane lytic vacuole vacuole lytic vacuole membrane lysosomal membrane lysosome Golgi membrane Golgi apparatus cell periphery plasma membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen nuclear body
A	Beta-1 adrenergic receptor	G protein-coupled amine receptor activity molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity beta1-adrenergic receptor activity beta-adrenergic receptor activity adrenergic receptor activity identical protein binding protein binding binding	cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of biological process regulation of signaling positive regulation of MAPK cascade biological regulation positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus MAPK cascade regulation of cell communication cellular process positive regulation of signaling adenylate cyclase-activating adrenergic receptor signaling pathway adenylate cyclase-activating G protein-coupled receptor signaling pathway adrenergic receptor signaling pathway adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway rhythmic process circadian sleep/wake cycle, sleep multicellular organismal process circadian sleep/wake cycle rhythmic behavior regulation of circadian sleep/wake cycle circadian rhythm regulation of circadian rhythm regulation of behavior behavior circadian behavior regulation of multicellular organismal process sleep regulation of circadian sleep/wake cycle, sleep circadian sleep/wake cycle process regulation of tube diameter regulation of systemic arterial blood pressure mediated by a chemical signal system process regulation of blood pressure regulation of tube size norepinephrine-epinephrine-mediated vasodilation involved in regulation of systemic arterial blood pressure negative regulation of blood pressure regulation of systemic arterial blood pressure by norepinephrine-epinephrine regulation of systemic arterial blood pressure circulatory system process negative regulation of systemic arterial blood pressure vascular process in circulatory system regulation of biological quality blood vessel diameter maintenance vasodilation blood circulation regulation of anatomical structure size heart process regulation of heart contraction regulation of system process positive regulation of blood circulation positive regulation of heart contraction regulation of blood circulation positive regulation of multicellular organismal process heart contraction	membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle membrane membrane-bounded organelle intracellular anatomical structure early endosome endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cellular anatomical structure cytoplasmic vesicle organelle cytoplasm vesicle membrane cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR000698	Arrestin	Family
B	IPR014753	Arrestin, N-terminal	Homologous Superfamily
B	IPR014756	Immunoglobulin E-set	Homologous Superfamily
B	IPR011021	Arrestin-like, N-terminal	Domain
B	IPR014752	Arrestin-like, C-terminal	Homologous Superfamily
B	IPR017864	Arrestin, conserved site	Conserved Site
B	IPR011022	Arrestin C-terminal-like domain	Domain
A	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
A	IPR002233	Adrenoceptor family	Family
A	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
A	IPR000507	Beta 1 adrenoceptor	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	Pharos: P49407	cirrhosis of liver pilocytic astrocytoma ulcerative colitis adrenal cortex carcinoma breast cancer Fibrosis, Liver large cell medulloblastoma lung carcinoma malignant glioma osteosarcoma astrocytic tumor glioblastoma lung adenocarcinoma major depressive disorder malignant mesothelioma cirrhosis of liver pilocytic astrocytoma ulcerative colitis adrenal cortex carcinoma breast cancer Fibrosis, Liver large cell medulloblastoma lung carcinoma malignant glioma osteosarcoma astrocytic tumor glioblastoma lung adenocarcinoma major depressive disorder malignant mesothelioma ovarian cancer tuberculosis atypical teratoid rhabdoid tumor ductal breast carcinoma in situ invasive ductal breast carcinoma lung cancer malignant ependymoma non-small cell lung carcinoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Alpha-helical polytopic	Rhodopsin-like receptors and pumps	G-protein coupled receptors, family A

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	G Protein-Coupled Receptors: Class A	β₁ adrenoceptor with bound agonist formoterol coupled to arrestin-2 in lipid nanodisc

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046
A	TPO	Parent Component: THR RESID: AA0037 , AA0038 PSI-MOD : O-phospho-L-serine MOD:00046 , O-phospho-L-threonine MOD:00047

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.