Annotations: 8J9O

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Cytochromes	8057879	3001526	SCOP2B (2022-06-29)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D	Light Chain	IGKV1	Kappa	frizzled-1,soluble cytochrome b562	SAbDab (2025-11-28)
C	Heavy Chain	IGHV1	-	-	SAbDab (2025-11-28)
B	Heavy Chain	IGHV3	-	frizzled-1,soluble cytochrome b562	SAbDab (2025-11-28)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF07361	Cytochrome b562 (Cytochrom_B562)	Cytochrome b562	-	Family
A	PF01534	Frizzled/Smoothened family membrane region (Frizzled)	Frizzled/Smoothened family membrane region	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D	anti-BRIL Fab Light Chain	-	-	-
C	anti-Fab nanobody	-	-	-
B	anti-BRIL Fab Heavy Chain	-	-	-
A	Frizzled-1,Soluble cytochrome b562	binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding protein binding signaling receptor binding molecular transducer activity transmembrane signaling receptor activity binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding protein binding signaling receptor binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity Wnt receptor activity G protein-coupled receptor activity PDZ domain binding protein domain specific binding G protein-coupled receptor binding frizzled binding Wnt-protein binding	electron transport chain metabolic process cellular process generation of precursor metabolites and energy regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process electron transport chain metabolic process cellular process generation of precursor metabolites and energy regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of DNA-templated transcription regulation of biological process negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process response to stimulus response to chemical response to xenobiotic stimulus astrocyte-dopaminergic neuron signaling glial cell-neuron signaling signaling cell-cell signaling cell communication cellular response to stimulus cell surface receptor signaling pathway canonical Wnt signaling pathway signal transduction Wnt signaling pathway non-canonical Wnt signaling pathway multicellular organismal process regulation of cellular component organization regulation of presynapse assembly cellular component organization cellular component biogenesis multicellular organism development cellular component assembly regulation of presynapse organization cell junction assembly anatomical structure development regulation of synapse structure or activity regulation of synapse assembly synapse organization cellular component organization or biogenesis regulation of biological quality system development developmental process presynapse organization nervous system development regulation of cellular component biogenesis regulation of cell junction assembly regulation of synapse organization cell junction organization synapse assembly presynapse assembly negative regulation of signaling regulation of canonical Wnt signaling pathway regulation of signal transduction negative regulation of cell communication negative regulation of Wnt signaling pathway regulation of signaling regulation of Wnt signaling pathway negative regulation of response to stimulus negative regulation of signal transduction negative regulation of canonical Wnt signaling pathway regulation of response to stimulus regulation of cell communication heart development cardiac chamber morphogenesis animal organ development heart morphogenesis ventricular septum development circulatory system development anatomical structure morphogenesis cardiac septum development cardiac septum morphogenesis ventricular septum morphogenesis cardiac chamber development membranous septum morphogenesis animal organ morphogenesis cardiac ventricle development hard palate development secondary palate development roof of mouth development cellular developmental process generation of neurons neurogenesis neuron differentiation cell differentiation muscle structure development muscle organ development tissue development muscle tissue morphogenesis tissue morphogenesis muscular septum morphogenesis muscle organ morphogenesis cell surface receptor protein serine/threonine kinase signaling pathway cellular response to growth factor stimulus regulation of transmembrane receptor protein serine/threonine kinase signaling pathway negative regulation of cellular response to growth factor stimulus negative regulation of BMP signaling pathway cellular response to endogenous stimulus BMP signaling pathway enzyme-linked receptor protein signaling pathway cellular response to BMP stimulus regulation of BMP signaling pathway response to endogenous stimulus regulation of cellular response to growth factor stimulus response to BMP transforming growth factor beta receptor superfamily signaling pathway response to growth factor negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway epithelium development endothelial cell differentiation endothelium development epithelial cell differentiation autocrine signaling regulation of neuron projection development positive regulation of cellular component organization cell projection organization positive regulation of biological process cell development neuron projection development positive regulation of neuron projection development positive regulation of cell projection organization positive regulation of cellular process plasma membrane bounded cell projection organization regulation of cell projection organization neuron development regulation of plasma membrane bounded cell projection organization regulation of osteoblast differentiation regulation of developmental process regulation of cell differentiation osteoblast differentiation positive regulation of developmental process positive regulation of osteoblast differentiation ossification positive regulation of cell differentiation positive regulation of DNA-templated transcription positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process positive regulation of macromolecule metabolic process positive regulation of RNA metabolic process positive regulation of RNA biosynthetic process head development dopaminergic neuron differentiation brain development central nervous system neuron differentiation central nervous system development midbrain development midbrain dopaminergic neuron differentiation intrinsic apoptotic signaling pathway in response to oxidative stress neuron apoptotic process regulation of oxidative stress-induced intrinsic apoptotic signaling pathway negative regulation of neuron apoptotic process negative regulation of intracellular signal transduction regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway intracellular signal transduction regulation of intracellular signal transduction negative regulation of apoptotic signaling pathway intrinsic apoptotic signaling pathway regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway negative regulation of programmed cell death regulation of apoptotic process negative regulation of oxidative stress-induced intrinsic apoptotic signaling pathway cell death neuron intrinsic apoptotic signaling pathway in response to oxidative stress apoptotic signaling pathway negative regulation of intrinsic apoptotic signaling pathway negative regulation of apoptotic process negative regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway apoptotic process programmed cell death regulation of neuron apoptotic process regulation of apoptotic signaling pathway stem cell differentiation regulation of stem cell differentiation mesenchymal stem cell differentiation regulation of mesenchymal stem cell differentiation transcription by RNA polymerase II regulation of transcription by RNA polymerase II positive regulation of transcription by RNA polymerase II outflow tract morphogenesis	cellular anatomical structure periplasmic space anchoring junction cell junction focal adhesion cell-substrate junction cell surface cell periphery plasma membrane membrane protein-containing complex Wnt signalosome

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR010980	Cytochrome c/b562	Homologous Superfamily
A	IPR009155	Cytochrome b562	Family
A	IPR036790	Frizzled cysteine-rich domain superfamily	Homologous Superfamily
A	IPR017981	GPCR, family 2-like, 7TM	Domain
A	IPR015526	Frizzled/secreted frizzled-related protein	Family
A	IPR000539	Frizzled/Smoothened, 7TM	Domain
A	IPR020067	Frizzled domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q9UP38	atypical teratoid rhabdoid tumor interstitial cystitis medulloblastoma psoriasis tuberculosis breast cancer large cell medulloblastoma osteosarcoma rheumatoid arthritis glioblastoma malignant ependymoma ovarian cancer Sjogren syndrome

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	G Protein-Coupled Receptors: Class F	Frizzled 1 (FZD1) receptor - G_q complex, apo state

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.