Annotations: 5K6X

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	I-set_4	e5k6xA4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_4	ECOD (1.6)
A	I-set_9	e5k6xA3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_9	ECOD (1.6)
A	I-set	e5k6xA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (1.6)
B	I-set_4	e5k6xB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_4	ECOD (1.6)
B	I-set_9	e5k6xB3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_9	ECOD (1.6)
B	I-set	e5k6xB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set	ECOD (1.6)

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 (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF13927	Immunoglobulin domain (Ig_3)	Immunoglobulin domain	This family contains immunoglobulin-like domains.	Domain
A, B	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, B	Protein sidekick-2	-	cell adhesion cell-cell adhesion cellular process cell-cell adhesion via plasma-membrane adhesion molecules homophilic cell adhesion via plasma membrane adhesion molecules multicellular organismal process cellular developmental process sensory organ development photoreceptor cell differentiation visual system development retina development in camera-type eye neural retina development eye morphogenesis multicellular organism development cell adhesion cell-cell adhesion cellular process cell-cell adhesion via plasma-membrane adhesion molecules homophilic cell adhesion via plasma membrane adhesion molecules multicellular organismal process cellular developmental process sensory organ development photoreceptor cell differentiation visual system development retina development in camera-type eye neural retina development eye morphogenesis multicellular organism development neurogenesis neuron differentiation cell differentiation eye photoreceptor cell differentiation anatomical structure development animal organ morphogenesis sensory system development system development developmental process camera-type eye morphogenesis eye development animal organ development nervous system development camera-type eye photoreceptor cell differentiation generation of neurons retina morphogenesis in camera-type eye anatomical structure morphogenesis sensory organ morphogenesis camera-type eye development retina layer formation anatomical structure formation involved in morphogenesis cellular component organization cellular component biogenesis cell junction organization cellular component assembly cell junction assembly synapse organization cellular component organization or biogenesis synapse assembly	synapse cell junction cellular anatomical entity cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B	IPR003599	Immunoglobulin subtype	Domain
A, B	IPR003598	Immunoglobulin subtype 2	Domain
A, B	IPR003961	Fibronectin type III	Domain
A, B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B	IPR007110	Immunoglobulin-like domain	Domain
A, B	IPR013098	Immunoglobulin I-set	Domain
A, B	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.