Annotations: 3NK3

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00100	e3nk3A2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF00100	ECOD (1.6)
B	PF00100	e3nk3B2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF00100	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.3210	Mainly Beta	Sandwich	Immunoglobulin-like	Zona pellucida, ZP-N domain	CATH (4.3.0)
A	2.60.40.4100	Mainly Beta	Sandwich	Immunoglobulin-like	Zona pellucida, ZP-C domain	CATH (4.3.0)
B	2.60.40.3210	Mainly Beta	Sandwich	Immunoglobulin-like	Zona pellucida, ZP-N domain	CATH (4.3.0)
B	2.60.40.4100	Mainly Beta	Sandwich	Immunoglobulin-like	Zona pellucida, ZP-C domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00100	Zona pellucida-like domain (Zona_pellucida)	Zona pellucida-like domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Zona pellucida 3	protein binding binding acrosin binding enzyme binding identical protein binding structural constituent of egg coat structural molecule activity extracellular matrix structural constituent	regulation of biological process sexual reproduction regulation of reproductive process reproductive process fertilization biological regulation positive regulation of biological process positive regulation of acrosome reaction acrosome reaction regulation of acrosome reaction single fertilization positive regulation of reproductive process response to organic substance response to ketone regulation of biological process sexual reproduction regulation of reproductive process reproductive process fertilization biological regulation positive regulation of biological process positive regulation of acrosome reaction acrosome reaction regulation of acrosome reaction single fertilization positive regulation of reproductive process response to organic substance response to ketone response to lipid response to stimulus response to endogenous stimulus response to progesterone response to oxygen-containing compound response to hormone response to steroid hormone response to chemical response to organic cyclic compound response to testosterone developmental process egg coat formation cellular developmental process oogenesis multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism female gamete generation developmental process involved in reproduction gamete generation cell differentiation anatomical structure development germ cell development cellular process sperm-egg recognition cell-cell recognition binding of sperm to zona pellucida cell recognition	apical part of cell cellular anatomical entity cell periphery plasma membrane membrane extracellular matrix external encapsulating structure extracellular region extracellular space
C, D	Zona pellucida 3	protein binding binding acrosin binding enzyme binding identical protein binding structural constituent of egg coat structural molecule activity extracellular matrix structural constituent	regulation of biological process sexual reproduction regulation of reproductive process reproductive process fertilization biological regulation positive regulation of biological process positive regulation of acrosome reaction acrosome reaction regulation of acrosome reaction single fertilization positive regulation of reproductive process response to organic substance response to ketone regulation of biological process sexual reproduction regulation of reproductive process reproductive process fertilization biological regulation positive regulation of biological process positive regulation of acrosome reaction acrosome reaction regulation of acrosome reaction single fertilization positive regulation of reproductive process response to organic substance response to ketone response to lipid response to stimulus response to endogenous stimulus response to progesterone response to oxygen-containing compound response to hormone response to steroid hormone response to chemical response to organic cyclic compound response to testosterone developmental process egg coat formation cellular developmental process oogenesis multicellular organismal reproductive process cell development cellular process involved in reproduction in multicellular organism female gamete generation developmental process involved in reproduction gamete generation cell differentiation anatomical structure development germ cell development cellular process sperm-egg recognition cell-cell recognition binding of sperm to zona pellucida cell recognition	apical part of cell cellular anatomical entity cell periphery plasma membrane membrane extracellular matrix external encapsulating structure extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR017977	Zona pellucida domain, conserved site	Conserved Site
A, B	IPR042235	Zona pellucida, ZP-C domain	Homologous Superfamily
A, B	IPR048290	Zona pellucida domain, chordate-type	Domain
A, B	IPR001507	Zona pellucida domain	Domain
C, D	IPR017977	Zona pellucida domain, conserved site	Conserved Site
C, D	IPR042235	Zona pellucida, ZP-C domain	Homologous Superfamily
C, D	IPR048290	Zona pellucida domain, chordate-type	Domain
C, D	IPR001507	Zona pellucida domain	Domain

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.