Annotations: 5K6V

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PPP2R1A-like_HEAT, VPS15-like_hel	e5k6vA1	A: alpha bundles	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PPP2R1A-like_HEAT, VPS15-like_hel	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13927	Immunoglobulin domain (Ig_3)	Immunoglobulin domain	This family contains immunoglobulin-like domains.	Domain
A	PF07679	Immunoglobulin I-set domain (I-set)	Immunoglobulin I-set domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Protein sidekick-1	identical protein binding protein binding binding	multicellular organismal process regulation of developmental process cellular developmental process cell projection organization cell development regulation of dendritic spine development neuron projection development cellular component organization neurogenesis multicellular organism development neuron differentiation dendrite development cell differentiation anatomical structure development multicellular organismal process regulation of developmental process cellular developmental process cell projection organization cell development regulation of dendritic spine development neuron projection development cellular component organization neurogenesis multicellular organism development neuron differentiation dendrite development cell differentiation anatomical structure development cellular component organization or biogenesis system development developmental process dendritic spine development regulation of biological process plasma membrane bounded cell projection organization biological regulation nervous system development generation of neurons neuron development cellular process behavior adult behavior response to stimulus behavioral response to cocaine response to chemical response to oxygen-containing compound response to nitrogen compound response to cocaine response to alkaloid cell adhesion cell-cell adhesion homophilic cell-cell adhesion retina layer formation camera-type eye morphogenesis sensory organ development eye development animal organ development retina development in camera-type eye visual system development neural retina development retina morphogenesis in camera-type eye eye morphogenesis anatomical structure morphogenesis sensory organ morphogenesis camera-type eye development anatomical structure formation involved in morphogenesis animal organ morphogenesis sensory system development cellular component biogenesis cell junction organization cellular component assembly cell junction assembly synapse organization synapse assembly	cellular anatomical structure synapse cell junction cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR003598	Immunoglobulin subtype 2	Domain
A	IPR003961	Fibronectin type III	Domain
A	IPR050964	Striated Muscle Structural and Regulatory Protein	Family
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR007110	Immunoglobulin-like domain	Domain
A	IPR013098	Immunoglobulin I-set	Domain
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

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.