1SLL

SIALIDASE L FROM LEECH MACROBDELLA DECORA

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1slla1	All beta proteins	Concanavalin A-like lectins/glucanases	Concanavalin A-like lectins/glucanases	Leech intramolecular trans-sialidase, N-terminal domain	Leech intramolecular trans-sialidase, N-terminal domain	North American leech (Macrobdella decora ) [TaxId: 6405 ],	SCOPe (2.08)
A	d1slla2	All beta proteins	6-bladed beta-propeller	Sialidases	Sialidases (neuraminidases)	Leech intramolecular trans-sialidase, C-terminal domain	North American leech (Macrobdella decora ) [TaxId: 6405 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Concanavalin A-like lectins/glucanases	8041453	3000120	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Sialidases	8042835	3001607	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	Laminin_G_3	e1sllA1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Concanavalin A-like lectins/glucanases	F: Laminin_G_3	ECOD (1.6)
A	BNR_2	e1sllA2	A: beta duplicates or obligate multimers	X: beta-propeller-like	H: beta-propeller	T: 6-bladed	F: BNR_2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.120.200	Mainly Beta	Sandwich	Jelly Rolls		CATH (4.3.0)
A	2.120.10.10	Mainly Beta	6 Propeller	Neuraminidase		CATH (4.3.0)
A	2.40.220.10	Mainly Beta	Beta Barrel	Intramolecular trans-sialidase	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13088	BNR repeat-like domain (BNR_2)	BNR repeat-like domain	-	Repeat
A	PF02973	Sialidase, N-terminal domain (Sialidase)	Sialidase, N-terminal domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	SIALIDASE L	anhydrosialidase activity lyase activity carbon-oxygen lyase activity, acting on polysaccharides catalytic activity carbon-oxygen lyase activity hydrolase activity, acting on glycosyl bonds alpha-sialidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity exo-alpha-sialidase activity	carbohydrate metabolic process catabolic process oligosaccharide catabolic process oligosaccharide metabolic process carbohydrate catabolic process primary metabolic process metabolic process cellular process membrane lipid metabolic process sphingolipid catabolic process ceramide metabolic process ganglioside catabolic process carbohydrate derivative catabolic process glycosphingolipid catabolic process carbohydrate metabolic process catabolic process oligosaccharide catabolic process oligosaccharide metabolic process carbohydrate catabolic process primary metabolic process metabolic process cellular process membrane lipid metabolic 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 membrane lipid catabolic process glycolipid catabolic process ceramide catabolic process amide metabolic process ganglioside metabolic process lipid metabolic process	cellular anatomical structure membrane extracellular region membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle intracellular membrane-bounded organelle cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011040	Sialidase	Domain
A	IPR023364	Trans-sialidase, domain 3	Homologous Superfamily
A	IPR036278	Sialidase superfamily	Homologous Superfamily
A	IPR013320	Concanavalin A-like lectin/glucanase domain superfamily	Homologous Superfamily
A	IPR004124	Glycoside hydrolase, family 33, N-terminal	Domain
A	IPR026856	Sialidase family	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	anhydrosialidase M-CSA #612	Intramolecular trans-sialidase (IT-sialidase) specifically cleaves the terminal N-acetyl-neuraminic acid-alpha-2-3-Galactose linkage in sialoglyco-conjugates. The released product is 2,7-anhydro-N-acetyl-neuraminic acid, indicating that the enzyme carries out an intramolecular reaction mechanism. This is in contrast to the hydrolytic sialidases whose product is free N-acetyl-neuraminic acid.	Defined by 3 residues: ASP:A-238 [auth A-318]GLU:A-515 [auth A-595]TYR:A-633 [auth A-713] \| 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 EC: 4.2.2.15 (UniProt) Search M-CSA Motif + EC 4.2.2.15

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.