Annotations: 6Q20

Crystal structure of human 1E01 Fab in complex with influenza virus neuraminidase from A/Japan/305/1957 (H2N2)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
C [auth H]	d6q20h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth L]	d6q20l2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth L]	d6q20l1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d6q20a_	All beta proteins	6-bladed beta-propeller	Sialidases	Sialidases (neuraminidases)	Influenza neuraminidase	(Influenza A virus (A/Japan/305-/1957(H2N2)) ) [TaxId: 382814 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Sialidases (neuraminidases)	8093789	4002683	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sialidases	8093790	3001607	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth H]	CatAgl_D2	e6q20H1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: CatAgl_D2	ECOD (v294.2)
B [auth L]	CatAgl_D2	e6q20L1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: CatAgl_D2	ECOD (v294.2)
A	HTH_ParB	e6q20A1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: HTH_ParB	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
A	2.120.10.10	Mainly Beta	6 Propeller	Neuraminidase		CATH (utative)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
C [auth H]	Fab 1E01, broadly protective	VH-CH1	Homo sapiens (human)	IGHV3-2004, IGHJ201, IGHG103, IGHG108, IGHG1*06	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)
B [auth L]	Fab 1E01, broadly protective	L-KAPPA	Homo sapiens (human)	IGKV1-901, IGKJ301, IGKC*01	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202617-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth H]	Heavy Chain	IGHV3	-	neuraminidase	SAbDab (2026-05-08)
B [auth L]	Light Chain	IGKV1	Kappa	neuraminidase	SAbDab (2026-05-08)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth H]	1E01 Fab IgG1 heavy chain	-	-	-
B [auth L]	1E01 Fab kappa light chain	-	-	-
A	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR001860	Glycoside hydrolase, family 34	Family
A	IPR033654	Sialidase, Influenza viruses A/B	Domain
A	IPR036278	Sialidase superfamily	Homologous Superfamily

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