Annotations: 9LZ1

Cryo-EM structure of PTH1R-beta-arrestin1 complex in state 2

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Protein Modification Annotation

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
E [auth A]	SCOP2B Superfamily	Arrestin/Vps26-like	8055051	3002071	SCOP2B (2022-06-29)
D [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091124	3000473	SCOP2B (2022-06-29)
D [auth R]	SCOP2B Superfamily	G protein-coupled receptor-like	8091124	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)
B [auth L]	Beta-Casp	e9lz1L1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth L]	Light Chain	IGKV1	Kappa	beta-arrestin-1 \| parathyroid hormone/parathyroid hormone-related peptidereceptor	SAbDab (2026-06-05)
A [auth H]	Heavy Chain	IGHV3	-	beta-arrestin-1 \| parathyroid hormone/parathyroid hormone-related peptidereceptor	SAbDab (2026-06-05)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
E [auth A]	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
E [auth A]	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
D [auth R]	PF00002	7 transmembrane receptor (Secretin family) (7tm_2)	7 transmembrane receptor (Secretin family)	This family is known as Family B, the secretin-receptor family or family 2 of the G-protein-coupled receptors (GCPRs). They have been described in many animal species, but not in plants, fungi or prokaryotes. Three distinct sub-families are recognise ...	This family is known as Family B, the secretin-receptor family or family 2 of the G-protein-coupled receptors (GCPRs). They have been described in many animal species, but not in plants, fungi or prokaryotes. Three distinct sub-families are recognised. Subfamily B1 contains classical hormone receptors, such as receptors for secretin and glucagon, that are all involved in cAMP-mediated signalling pathways. Subfamily B2 contains receptors with long extracellular N-termini, such as the leukocyte cell-surface antigen CD97 (Swiss:P48960); calcium-independent receptors for latrotoxin (such as Swiss:O94910), and brain-specific angiogenesis inhibitors (such as Swiss:O14514) amongst others. Subfamily B3 includes Methuselah and other Drosophila proteins (e.g. Swiss:P83119). Other than the typical seven-transmembrane region, characteristic structural features include an amino-terminal extracellular domain involved in ligand binding, and an intracellular loop (IC3) required for specific G-protein coupling [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E [auth A]	Beta-arrestin-1	clathrin binding protein binding binding protein-containing complex binding AP-2 adaptor complex binding clathrin heavy chain binding signaling receptor binding acetylcholine receptor binding small molecule binding ion binding phosphatidylinositol-3,4,5-trisphosphate binding anion binding phospholipid binding lipid binding clathrin binding protein binding binding protein-containing complex binding AP-2 adaptor complex binding clathrin heavy chain binding signaling receptor binding acetylcholine receptor binding small molecule binding ion binding phosphatidylinositol-3,4,5-trisphosphate binding anion binding phospholipid binding lipid binding phosphatidylinositol phosphate binding molecular adaptor activity G protein-coupled receptor binding inositol hexakisphosphate binding alcohol 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 positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction intracellular signaling cassette 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 positive regulation of ERK1 and ERK2 cascade 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 ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling localization import into cell receptor internalization transport receptor-mediated endocytosis endocytosis establishment of localization vesicle-mediated transport establishment of protein localization 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 cellular component organization positive regulation of endocytosis cellular component organization or biogenesis 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 negative adaptation of signaling pathway negative regulation of signaling negative regulation of biological process desensitization of G protein-coupled receptor signaling pathway negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication negative regulation of cellular process regulation of G protein-coupled receptor signaling pathway negative regulation of response to stimulus negative regulation of signal transduction adaptation of signaling pathway G protein-coupled receptor signaling pathway multicellular organismal process system process sensory perception nervous system process clathrin-dependent endocytosis cell surface receptor signaling pathway Notch signaling pathway negative regulation of Notch signaling pathway regulation of Notch signaling pathway catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process metabolic process protein metabolic process macromolecule metabolic process positive regulation of phosphorylation regulation of protein modification process regulation of protein phosphorylation positive regulation of protein metabolic process positive regulation of phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process positive regulation of protein phosphorylation protein modification process protein phosphorylation phosphorylation regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification regulation of phosphorylation regulation of metabolic process G protein-coupled receptor internalization	cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection protein-containing complex intracellular anatomical structure plasma membrane protein complex membrane plasma membrane membrane protein complex coated membrane endomembrane system clathrin coat membrane coat cell projection cellular anatomical structure pseudopodium plasma membrane bounded cell projection protein-containing complex intracellular anatomical structure plasma membrane protein complex membrane plasma membrane membrane protein complex coated membrane endomembrane system clathrin coat membrane coat cell periphery clathrin-coated pit cytoplasm clathrin coat of coated pit cytosol membrane-bounded organelle intracellular organelle cytoplasmic vesicle organelle intracellular vesicle intracellular membrane-bounded organelle vesicle nucleus
D [auth R]	Parathyroid hormone/parathyroid hormone-related peptide receptor	molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity identical protein binding protein binding binding protein homodimerization activity protein dimerization activity peptide hormone binding hormone binding peptide receptor activity G protein-coupled peptide receptor activity parathyroid hormone receptor activity	developmental process multicellular organismal process ossification bone mineralization animal organ development anatomical structure development biomineral tissue development tissue development multicellular organism development skeletal system development system development cell population proliferation cellular process cellular response to stimulus developmental process multicellular organismal process ossification bone mineralization animal organ development anatomical structure development biomineral tissue development tissue development multicellular organism development skeletal system development system development cell population proliferation cellular process cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cell communication adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway signal transduction inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis osteoblast development cellular developmental process cell differentiation cell development osteoblast differentiation embryo development ending in birth or egg hatching chordate embryonic development embryo development in utero embryonic development anatomical structure maturation cell maturation developmental maturation adenylate cyclase-activating G protein-coupled receptor signaling pathway positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of biological process positive regulation of cellular process cell surface receptor signaling pathway negative regulation of cell population proliferation negative regulation of cellular process negative regulation of biological process phospholipase C-activating G protein-coupled receptor signaling pathway connective tissue development chondrocyte differentiation cartilage development regulation of inositol phosphate biosynthetic process alcohol metabolic process inositol phosphate metabolic process regulation of primary metabolic process positive regulation of metabolic process regulation of small molecule metabolic process positive regulation of biosynthetic process polyol biosynthetic process small molecule metabolic process phosphorus metabolic process regulation of carbohydrate metabolic process regulation of biosynthetic process carbohydrate metabolic process polyol metabolic process positive regulation of phosphorus metabolic process regulation of alcohol biosynthetic process small molecule biosynthetic process carbohydrate biosynthetic process primary metabolic process positive regulation of inositol phosphate biosynthetic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process inositol phosphate biosynthetic process alcohol biosynthetic process metabolic process regulation of phosphorus metabolic process positive regulation of carbohydrate metabolic process regulation of carbohydrate biosynthetic process positive regulation of small molecule metabolic process regulation of metabolic process positive regulation of alcohol biosynthetic process multicellular organismal-level homeostasis tissue remodeling bone remodeling anatomical structure homeostasis tissue homeostasis bone resorption G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger	membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle cellular anatomical structure organelle lumen organelle membraneless organelle nuclear lumen cell periphery apical part of cell membrane plasma membrane plasma membrane region apical plasma membrane cytoplasm cytosol basal part of cell basal plasma membrane basolateral plasma membrane protein-containing complex signaling receptor complex
C [auth P]	Long-acting PTH	-	-	-
B [auth L]	Fab30 light chain	-	-	-
A [auth H]	Fab30 heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth A]	IPR011022	Arrestin-like, C-terminal domain	Domain
E [auth A]	IPR000698	Arrestin	Family
E [auth A]	IPR011021	Arrestin-like, N-terminal	Domain
E [auth A]	IPR014753	Arrestin, N-terminal	Homologous Superfamily
E [auth A]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
E [auth A]	IPR017864	Arrestin, conserved site	Conserved Site
E [auth A]	IPR014752	Arrestin-like, C-terminal domain superfamily	Homologous Superfamily
D [auth R]	IPR017983	GPCR, family 2, secretin-like, conserved site	Conserved Site
D [auth R]	IPR050332	G-protein coupled receptor 2	Family
D [auth R]	IPR036445	GPCR family 2, extracellular hormone receptor domain superfamily	Homologous Superfamily
D [auth R]	IPR002170	GPCR, family 2, parathyroid hormone receptor	Family
D [auth R]	IPR000832	GPCR, family 2, secretin-like	Family
D [auth R]	IPR017981	GPCR, family 2-like, 7TM	Domain
D [auth R]	IPR001879	GPCR, family 2, extracellular hormone receptor domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth R]	: Q03431	Eiken syndrome metaphyseal chondrodysplasia, Jansen type rickets chondrodysplasia Blomstrand type Ollier disease primary failure of tooth eruption hyperparathyroidism medulloblastoma osteogenesis imperfecta psoriasis adrenal cortex adenoma breast carcinoma Glucocorticoid Induced Osteoporosis large cell medulloblastoma malignant glioma Eiken syndrome metaphyseal chondrodysplasia, Jansen type rickets chondrodysplasia Blomstrand type Ollier disease primary failure of tooth eruption hyperparathyroidism medulloblastoma osteogenesis imperfecta psoriasis adrenal cortex adenoma breast carcinoma Glucocorticoid Induced Osteoporosis large cell medulloblastoma malignant glioma postmenopausal osteoporosis adrenal cortex carcinoma hepatocellular carcinoma hypoparathyroidism lung disease malignant mesothelioma tooth ankylosis glioblastoma intellectual disability

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth R]	SEP	Parent Component: SER : AA0037 : O-phospho-L-serine MOD:00046
D [auth R]	TPO	Parent Component: THR : AA0037 , AA0038 : O-phospho-L-serine MOD:00046 , O-phospho-L-threonine MOD:00047

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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.