Annotations: 8TGA

Complex of NPR1 ectodomain and REGN5381 Fab in an active-like state with no ANP bound

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth H]	WD40	e8tgaH1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
C [auth E]	WD40	e8tgaE1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
E [auth L]	WD40	e8tgaL1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
B [auth F]	WD40	e8tgaF1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
D [auth A]	WD40	e8tgaA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)
A [auth B]	WD40	e8tgaB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: WD40	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth E], F [auth H]	Heavy Chain	IGHV1	-	atrial natriuretic peptide receptor 1	SAbDab (2026-06-19)
B [auth F], E [auth L]	Light Chain	IGKV1	Kappa	atrial natriuretic peptide receptor 1	SAbDab (2026-06-19)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

Chain	Name	Target	Provenance Source
C [auth E], F [auth H]	Vixticibart	NPR1/ANPRA/ANPa/GUC2A/GUCY2A/NPRA	Therapeutic SAbDab (2026-06-19)
B [auth F], E [auth L]	Vixticibart	NPR1/ANPRA/ANPa/GUC2A/GUCY2A/NPRA	Therapeutic SAbDab (2026-06-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], D [auth A]	PF01094	Receptor family ligand binding region (ANF_receptor)	Receptor family ligand binding region	This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth E], F [auth H]	REGN5381 Fab heavy chain	-	-	-
B [auth F], E [auth L]	REGN5381 Fab light chain	-	-	-
A [auth B], D [auth A]	Atrial natriuretic peptide receptor 1	peptide receptor activity molecular transducer activity signaling receptor activity natriuretic peptide receptor activity binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding peptide receptor activity molecular transducer activity signaling receptor activity natriuretic peptide receptor activity binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding adenyl ribonucleotide binding adenyl nucleotide binding ATP binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups peptide hormone binding hormone binding G protein-coupled receptor activity G protein-coupled peptide receptor activity transmembrane signaling receptor activity phosphorus-oxygen lyase activity cyclase activity lyase activity guanylate cyclase activity	multicellular organismal process system process circulatory system process regulation of blood pressure biological regulation regulation of biological quality blood circulation regulation of body fluid levels renal system process positive regulation of urine volume regulation of urine volume regulation of biological process negative regulation of cell population proliferation cell population proliferation multicellular organismal process system process circulatory system process regulation of blood pressure biological regulation regulation of biological quality blood circulation regulation of body fluid levels renal system process positive regulation of urine volume regulation of urine volume regulation of biological process negative regulation of cell population proliferation cell population proliferation regulation of cellular process regulation of smooth muscle cell proliferation negative regulation of biological process smooth muscle cell proliferation negative regulation of smooth muscle cell proliferation regulation of cell population proliferation negative regulation of cellular process muscle cell proliferation cellular process regulation of vascular permeability vascular process in circulatory system regulation of growth regulation of cellular component organization growth negative regulation of cell growth regulation of cell growth cell growth cellular component organization negative regulation of growth cellular component organization or biogenesis amine metabolic process catecholamine metabolic process phenol-containing compound metabolic process dopamine metabolic process metabolic process catechol-containing compound metabolic process biogenic amine metabolic process body fluid secretion localization secretion transport establishment of localization cellular response to stimulus cell surface receptor signaling pathway response to stimulus signaling signal transduction cell communication regulation of localization renal sodium excretion inorganic ion homeostasis regulation of renal system process homeostatic process regulation of system process positive regulation of biological process positive regulation of secretion monoatomic ion homeostasis regulation of multicellular organismal process monoatomic cation homeostasis positive regulation of renal sodium excretion excretion sodium ion homeostasis regulation of transport renal tubular secretion regulation of secretion regulation of renal sodium excretion positive regulation of transport chemical homeostasis positive regulation of multicellular organismal process regulation of excretion ribose phosphate metabolic process nucleotide biosynthetic process carbohydrate derivative metabolic process purine ribonucleotide biosynthetic process cyclic nucleotide metabolic process nucleobase-containing compound metabolic process ribonucleotide biosynthetic process purine nucleotide metabolic process ribonucleotide metabolic process nucleobase-containing small molecule metabolic process purine-containing compound biosynthetic process cyclic nucleotide biosynthetic process small molecule metabolic process phosphorus metabolic process ribose phosphate biosynthetic process nucleoside phosphate metabolic process carbohydrate derivative biosynthetic process cyclic purine nucleotide metabolic process primary metabolic process nucleotide metabolic process nucleobase-containing compound biosynthetic process purine-containing compound metabolic process biosynthetic process cGMP metabolic process organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process purine ribonucleotide metabolic process cGMP biosynthetic process purine nucleotide biosynthetic process regulation of developmental process angiogenesis regulation of vasculature development multicellular organism development tube morphogenesis anatomical structure development regulation of anatomical structure morphogenesis system development blood vessel development developmental process regulation of multicellular organismal development blood vessel morphogenesis tube development negative regulation of blood vessel morphogenesis negative regulation of developmental process negative regulation of angiogenesis vasculature development circulatory system development negative regulation of vasculature development anatomical structure morphogenesis regulation of angiogenesis anatomical structure formation involved in morphogenesis negative regulation of multicellular organismal process intracellular signal transduction regulation of tube diameter regulation of tube size blood vessel diameter maintenance regulation of anatomical structure size receptor guanylyl cyclase signaling pathway enzyme-linked receptor protein signaling pathway	membrane-bounded organelle intracellular anatomical structure nuclear membrane membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope cellular anatomical structure organelle nuclear envelope organelle membrane cell periphery membrane-bounded organelle intracellular anatomical structure nuclear membrane membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope cellular anatomical structure organelle nuclear envelope organelle membrane cell periphery plasma membrane organelle subcompartment endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm endoplasmic reticulum membrane protein-containing complex signaling receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], D [auth A]	IPR001054	Adenylyl cyclase class-3/4/guanylyl cyclase	Domain
A [auth B], D [auth A]	IPR050401	Cyclic nucleotide synthase	Family
A [auth B], D [auth A]	IPR000719	Protein kinase domain	Domain
A [auth B], D [auth A]	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
A [auth B], D [auth A]	IPR029787	Nucleotide cyclase	Homologous Superfamily
A [auth B], D [auth A]	IPR018297	Adenylyl cyclase class-4/guanylyl cyclase, conserved site	Conserved Site
A [auth B], D [auth A]	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A [auth B], D [auth A]	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A [auth B], D [auth A]	IPR001170	Adenylyl cyclase class-4/guanylyl cyclase	Family
A [auth B], D [auth A]	IPR001828	Receptor, ligand binding region	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B], D [auth A]	: P16066	Fibrosis kidney disease congestive heart failure hypertensive disorder lung adenocarcinoma malignant glioma osteosarcoma psoriasis breast fibroadenoma lung cancer alcohol-related disorders ductal breast carcinoma in situ lung carcinoma non-small cell lung carcinoma breast carcinoma Fibrosis kidney disease congestive heart failure hypertensive disorder lung adenocarcinoma malignant glioma osteosarcoma psoriasis breast fibroadenoma lung cancer alcohol-related disorders ductal breast carcinoma in situ lung carcinoma non-small cell lung carcinoma breast carcinoma Sjogren syndrome heart failure invasive ductal breast carcinoma

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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.