Annotations: 7ZW1

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C		e7zw1C1	A: a/b three-layered sandwiches	X: RNase A-like	H: RNase A-like	T: RNase A-like	F:	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C	Heavy Chain	IGHV1	-	rod outer segment membrane protein 1	SAbDab (2026-04-17)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF00335	Tetraspanin family (Tetraspanin)	Tetraspanin family	-	Family
A	PF00335	Tetraspanin family (Tetraspanin)	Tetraspanin family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C	Nanobody	-	-	-
B	Rod outer segment membrane protein 1	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	developmental process multicellular organismal process sensory organ development retina vasculature development in camera-type eye eye development animal organ development retina development in camera-type eye visual system development vasculature development circulatory system development multicellular organism development camera-type eye development anatomical structure development sensory system development developmental process multicellular organismal process sensory organ development retina vasculature development in camera-type eye eye development animal organ development retina development in camera-type eye visual system development vasculature development circulatory system development multicellular organism development camera-type eye development anatomical structure development sensory system development system development detection of light stimulus involved in visual perception detection of light stimulus response to light stimulus detection of external stimulus sensory perception of light stimulus system process nervous system process response to stimulus response to external stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of light stimulus involved in sensory perception response to abiotic stimulus response to radiation visual perception detection of stimulus involved in sensory perception cellular developmental process photoreceptor cell differentiation cell development nervous system development generation of neurons cellular component organization neurogenesis neuron differentiation photoreceptor cell outer segment organization cell differentiation neuron development cellular process cellular component organization or biogenesis photoreceptor cell development localization protein localization to cilium protein localization to organelle macromolecule localization protein localization to photoreceptor outer segment intracellular protein localization protein localization to non-motile cilium cell adhesion regulation of biosynthetic process regulation of biological process regulation of cellular process biological regulation regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression biosynthetic process regulation of macromolecule biosynthetic process metabolic process macromolecule metabolic process regulation of metabolic process neural retina development eye morphogenesis eye photoreceptor cell differentiation animal organ morphogenesis camera-type eye morphogenesis camera-type eye photoreceptor cell differentiation retina morphogenesis in camera-type eye anatomical structure morphogenesis sensory organ morphogenesis cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein heterooligomerization protein homooligomerization	membrane-bounded organelle non-motile cilium membrane plasma membrane cilium 9+0 non-motile cilium neuron projection ciliary membrane photoreceptor outer segment membrane photoreceptor outer segment plasma membrane bounded cell projection cell periphery cell projection bounding membrane of organelle membrane-bounded organelle non-motile cilium membrane plasma membrane cilium 9+0 non-motile cilium neuron projection ciliary membrane photoreceptor outer segment membrane photoreceptor outer segment plasma membrane bounded cell projection cell periphery cell projection bounding membrane of organelle cellular anatomical structure photoreceptor cell cilium organelle plasma membrane region organelle membrane cell projection membrane
A	Peripherin-2	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	detection of light stimulus involved in visual perception detection of light stimulus response to light stimulus multicellular organismal process detection of external stimulus sensory perception of light stimulus system process nervous system process response to stimulus response to external stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of light stimulus involved in sensory perception detection of light stimulus involved in visual perception detection of light stimulus response to light stimulus multicellular organismal process detection of external stimulus sensory perception of light stimulus system process nervous system process response to stimulus response to external stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of light stimulus involved in sensory perception response to abiotic stimulus response to radiation visual perception detection of stimulus involved in sensory perception developmental process cellular developmental process photoreceptor cell differentiation cell development nervous system development generation of neurons cellular component organization neurogenesis multicellular organism development neuron differentiation photoreceptor cell outer segment organization cell differentiation neuron development anatomical structure development cellular process cellular component organization or biogenesis photoreceptor cell development system development cell adhesion sensory organ development eye development animal organ development retina development in camera-type eye visual system development camera-type eye development sensory system development biosynthetic process metabolic process primary metabolic process protein metabolic process macromolecule metabolic process gene expression macromolecule biosynthetic process protein maturation cellular component biogenesis cellular component assembly protein-containing complex organization protein complex oligomerization protein-containing complex assembly protein heterooligomerization localization protein localization to cell periphery cellular localization protein localization to plasma membrane macromolecule localization intracellular protein localization localization within membrane protein localization to membrane protein homooligomerization response to low light intensity stimulus response to light intensity	cellular anatomical structure membrane photoreceptor inner segment cell periphery plasma membrane membrane-bounded organelle non-motile cilium 9+0 non-motile cilium cilium neuron projection photoreceptor outer segment plasma membrane bounded cell projection cell projection photoreceptor cell cilium cellular anatomical structure membrane photoreceptor inner segment cell periphery plasma membrane membrane-bounded organelle non-motile cilium 9+0 non-motile cilium cilium neuron projection photoreceptor outer segment plasma membrane bounded cell projection cell projection photoreceptor cell cilium organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR008952	Tetraspanin, EC2 domain superfamily	Homologous Superfamily
B	IPR042026	Peripherin, extracellular domain	Domain
B	IPR018498	Peripherin/rom-1, conserved site	Conserved Site
B	IPR018499	Tetraspanin/Peripherin	Family
B	IPR000830	Peripherin/rom-1	Family
A	IPR008952	Tetraspanin, EC2 domain superfamily	Homologous Superfamily
A	IPR042026	Peripherin, extracellular domain	Domain
A	IPR018498	Peripherin/rom-1, conserved site	Conserved Site
A	IPR018499	Tetraspanin/Peripherin	Family
A	IPR000830	Peripherin/rom-1	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	Pharos: Q03395	retinitis pigmentosa retinitis pigmentosa 7 retinal degeneration cone-rod dystrophy
A	Pharos: P23942	retinitis pigmentosa retinitis pigmentosa 7 fundus albipunctatus cone-rod dystrophy vitelliform macular dystrophy choroidal dystrophy, central areolar 2 vitelliform macular dystrophy 3 partial central choroid dystrophy patterned macular dystrophy 1 retinal degeneration patterned dystrophy of the retinal pigment epithelium patterned macular dystrophy primitive neuroectodermal tumor Retinitis punctata albescens (disorder) adult-onset foveomacular vitelliform dystrophy retinitis pigmentosa retinitis pigmentosa 7 fundus albipunctatus cone-rod dystrophy vitelliform macular dystrophy choroidal dystrophy, central areolar 2 vitelliform macular dystrophy 3 partial central choroid dystrophy patterned macular dystrophy 1 retinal degeneration patterned dystrophy of the retinal pigment epithelium patterned macular dystrophy primitive neuroectodermal tumor Retinitis punctata albescens (disorder) adult-onset foveomacular vitelliform dystrophy choroidal dystrophy, central areolar, 1 malignant ependymoma oligodendroglioma Stargardt disease inherited retinal dystrophy macular degeneration medulloblastoma pancreatic intraductal papillary-mucinous carcinoma patterned macular dystrophy 2 retinitis punctata albescens facioscapulohumeral muscular dystrophy malignant colon neoplasm pancreatic intraductal papillary-mucinous neoplasm

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Alpha-helical polytopic	Tetraspanin	Tetraspanin

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	Tetraspanins	Perioherin-2 (PRPH2)-Rod out segment membrane protein 1 (ROM1) hetero-dimer

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.