Annotations: 8ZR4

Cryo-EM structure of the N2-4N2C402 complex at a resolution of 1.9 angstrom

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L [auth N]		e8zr4N1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
I [auth K]		e8zr4K1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
F [auth H]		e8zr4H1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
C [auth D]	GFO_IDH_MocA	e8zr4D01	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: GFO_IDH_MocA	ECOD (v295)
K [auth M]		e8zr4M1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
H [auth J]		e8zr4J1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
E [auth G]		e8zr4G1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
B	GFO_IDH_MocA	e8zr4B01	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: GFO_IDH_MocA	ECOD (v295)
J [auth L]		e8zr4L1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
G [auth I]		e8zr4I1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
D [auth F]		e8zr4F1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F:	ECOD (v295)
A	GFO_IDH_MocA	e8zr4A01	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: GFO_IDH_MocA	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, E [auth G], H [auth J], K [auth M]	Light Chain	IGKV2	Kappa	neuraminidase	SAbDab (2026-07-10)
A, D [auth F], G [auth I], J [auth L]	Heavy Chain	IGHV3	-	neuraminidase	SAbDab (2026-07-10)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth D], F [auth H], I [auth K], L [auth N]	Neuraminidase	cation binding ion binding binding metal ion binding small molecule binding hydrolase activity, acting on glycosyl bonds alpha-sialidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity exo-alpha-sialidase activity catalytic activity	carbohydrate metabolic process primary metabolic process metabolic process cellular process biological process involved in interspecies interaction between organisms non-lytic viral release viral budding viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction virion assembly exit from host cell viral process viral budding from plasma membrane carbohydrate metabolic process primary metabolic process metabolic process cellular process biological process involved in interspecies interaction between organisms non-lytic viral release viral budding viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction virion assembly exit from host cell viral process viral budding from plasma membrane viral release from host cell	cellular anatomical structure membrane host cell plasma membrane host cellular component host cell part host cell membrane other organism part virion component virion membrane
B, E [auth G], H [auth J], K [auth M]	4N2C402_Fab_L	-	-	-
A, D [auth F], G [auth I], J [auth L]	4N2C402_Fab_H	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth D], F [auth H], I [auth K], L [auth N]	IPR001860	Glycoside hydrolase, family 34	Family
C [auth D], F [auth H], I [auth K], L [auth N]	IPR033654	Sialidase, Influenza viruses A/B	Domain
C [auth D], F [auth H], I [auth K], L [auth N]	IPR036278	Sialidase superfamily	Homologous Superfamily

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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.

8ZR4 | pdb_00008zr4

Cryo-EM structure of the N2-4N2C402 complex at a resolution of 1.9 angstrom

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

SAbDab Antibody Annotation SAbDab Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage