Annotations: 1EUU

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1euua1	All beta proteins	Immunoglobulin-like beta-sandwich	E set domains	E-set domains of sugar-utilizing enzymes	Sialidase, linker domain	(Micromonospora viridifaciens ) [TaxId: 1881 ],	SCOPe (2.08)
A	d1euua2	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	Galactose-binding domain	Sialidase, C-terminal domain	(Micromonospora viridifaciens ) [TaxId: 1881 ],	SCOPe (2.08)
A	d1euua3	All beta proteins	6-bladed beta-propeller	Sialidases	Sialidases (neuraminidases)	Micromonospora sialidase, N-terminal domain	(Micromonospora viridifaciens ) [TaxId: 1881 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	galactose-binding domain-like	8043343	3000087	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Sialidases	8043344	3001607	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	E set domains	8054893	3000070	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	CBM27	e1euuA1	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: beta-Prism I	T: beta-Prism I	F: CBM27	ECOD (v294.1)
A	Copper-bind	e1euuA2	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: beta-Prism I	T: beta-Prism I	F: Copper-bind	ECOD (v294.1)
A	FG-GAP, FG-GAP_3	e1euuA3	A: a/b three-layered sandwiches	X: Phage tail fiber protein trimerization domain	H: Phage tail fiber protein trimerization domain	T: Phage tail fiber protein trimerization domain	F: FG-GAP, FG-GAP_3	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.120.10.10	Mainly Beta	6 Propeller	Neuraminidase		CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	SIALIDASE	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 catabolic process oligosaccharide catabolic process oligosaccharide metabolic process carbohydrate catabolic process primary metabolic process metabolic process cellular process sphingolipid catabolic process ceramide metabolic process ganglioside catabolic process carbohydrate derivative catabolic process glycosphingolipid catabolic process lipid catabolic process carbohydrate metabolic process catabolic process oligosaccharide catabolic process oligosaccharide metabolic process carbohydrate catabolic process primary metabolic process metabolic process cellular process sphingolipid catabolic process ceramide metabolic process ganglioside catabolic process carbohydrate derivative catabolic process glycosphingolipid catabolic process lipid catabolic process glycolipid metabolic process glycosphingolipid metabolic process liposaccharide metabolic process carbohydrate derivative metabolic process sphingolipid metabolic process glycolipid catabolic process ceramide catabolic process ganglioside metabolic process lipid metabolic process	cellular anatomical structure membrane extracellular region intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR018905	Alpha-galactosidase, NEW3 domain	Domain
A	IPR006311	Twin-arginine translocation pathway, signal sequence	Conserved Site
A	IPR011040	Sialidase	Domain
A	IPR008979	Galactose-binding-like domain superfamily	Homologous Superfamily
A	IPR036278	Sialidase superfamily	Homologous Superfamily
A	IPR000421	Coagulation factor 5/8, C-terminal domain	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A	IPR026856	Sialidase family	Family

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	exo-alpha-sialidase (GH33 Family) M-CSA #835	Exo sialidases (neuraminidases) catalyse the removal of terminal sialic acid residues in oligosaccharides, glycoproteins, glycolipids and synthetic substrates to release free sialic acid. This class function to release sialic acids for use as carbon and energy sources for non-pathogenic bacterium while in pathogenic microorganisms, sialidases have been suggested to be pathogenic factors.	Defined by 3 residues: ASP:A-50 [auth A-92]GLU:A-218 [auth A-260]TYR:A-328 [auth A-370] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.2.1.18 (PDB Primary Data) Search M-CSA Motif + EC 3.2.1.18

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.