Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2B SuperfamilyConcanavalin A-like lectins/glucanases 8041453 3000120 SCOP2B (2022-06-29)
ASCOP2B SuperfamilySialidases 8042835 3001607 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
ALaminin_G_3e1sllA1 A: beta sandwichesX: jelly-rollH: Concanavalin A-likeT: Concanavalin A-like lectins/glucanasesF: Laminin_G_3ECOD (1.6)
ABNR_2e1sllA2 A: beta duplicates or obligate multimersX: beta-propeller-likeH: beta-propellerT: 6-bladedF: BNR_2ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.60.120.200 Mainly Beta Sandwich Jelly Rolls CATH (4.3.0)
A2.120.10.10 Mainly Beta 6 Propeller Neuraminidase CATH (4.3.0)
A2.40.220.10 Mainly Beta Beta Barrel Intramolecular trans-sialidase domain 3CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF13088BNR repeat-like domain (BNR_2)BNR repeat-like domain- Repeat
PF02973Sialidase, N-terminal domain (Sialidase)Sialidase, N-terminal domain- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
SIALIDASE L

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

ChainsEnzyme NameDescriptionCatalytic Residues
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]
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