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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad2gjxa1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad2gjxa2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Dd2gjxd1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Dd2gjxd2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ed2gjxe1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ed2gjxe2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Hd2gjxh1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Hd2gjxh2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase A (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd2gjxb1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase B (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd2gjxb2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase B, N-terminal domain (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd2gjxc1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase B (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd2gjxc2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase B, N-terminal domain (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Fd2gjxf1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase B (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Fd2gjxf2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase B, N-terminal domain (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Gd2gjxg1 Alpha and beta proteins (a/b) TIM beta/alpha-barrel (Trans)glycosidases beta-N-acetylhexosaminidase catalytic domain beta-hexosaminidase B (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Gd2gjxg2 Alpha and beta proteins (a+b) Zincin-like beta-N-acetylhexosaminidase-like domain beta-N-acetylhexosaminidase domain beta-hexosaminidase B, N-terminal domain (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 Familybeta-N-acetylhexosaminidase catalytic domain 8020520 4003199 SCOP2 (2022-06-29)
ASCOP2 Familybeta-N-acetylhexosaminidase domain 8020521 4001646 SCOP2 (2022-06-29)
ASCOP2 Superfamily(Trans)glycosidases 8032900 3000313 SCOP2 (2022-06-29)
ASCOP2 Superfamilybeta-N-acetylhexosaminidase-like domain 8032901 3000192 SCOP2 (2022-06-29)
DSCOP2B Superfamily(Trans)glycosidases 8032900 3000313 SCOP2B (2022-06-29)
DSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8032901 3000192 SCOP2B (2022-06-29)
ESCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8032901 3000192 SCOP2B (2022-06-29)
ESCOP2B Superfamily(Trans)glycosidases 8032900 3000313 SCOP2B (2022-06-29)
HSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8032901 3000192 SCOP2B (2022-06-29)
HSCOP2B Superfamily(Trans)glycosidases 8032900 3000313 SCOP2B (2022-06-29)
BSCOP2B Superfamily(Trans)glycosidases 8037318 3000313 SCOP2B (2022-06-29)
BSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8037319 3000192 SCOP2B (2022-06-29)
CSCOP2B Superfamily(Trans)glycosidases 8037318 3000313 SCOP2B (2022-06-29)
CSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8037319 3000192 SCOP2B (2022-06-29)
FSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8037319 3000192 SCOP2B (2022-06-29)
FSCOP2B Superfamily(Trans)glycosidases 8037318 3000313 SCOP2B (2022-06-29)
GSCOP2B Superfamily(Trans)glycosidases 8037318 3000313 SCOP2B (2022-06-29)
GSCOP2B Superfamilybeta-N-acetylhexosaminidase-like domain 8037319 3000192 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AGlyco_hydro_20e2gjxA1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
AGlycohydro_20b2e2gjxA2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
DGlyco_hydro_20e2gjxD1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
DGlycohydro_20b2e2gjxD2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
EGlyco_hydro_20e2gjxE1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
EGlycohydro_20b2e2gjxE2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
HGlyco_hydro_20e2gjxH1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
HGlycohydro_20b2e2gjxH2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
BGlyco_hydro_20e2gjxB1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
BGlycohydro_20b2e2gjxB2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
CGlyco_hydro_20e2gjxC1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
CGlycohydro_20b2e2gjxC2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
FGlyco_hydro_20e2gjxF1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
FGlycohydro_20b2e2gjxF2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)
GGlyco_hydro_20e2gjxG1 A: a/b barrelsX: TIM beta/alpha-barrelH: TIM barrels (From Topology)T: TIM barrelsF: Glyco_hydro_20ECOD (1.6)
GGlycohydro_20b2e2gjxG2 A: mixed a+b and a/bX: Zincin-likeH: beta-N-acetylhexosaminidase-like domain (From Topology)T: beta-N-acetylhexosaminidase-like domainF: Glycohydro_20b2ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
A3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
D3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
D3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
E3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
E3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
H3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
H3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
B3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
B3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
C3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
C3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
F3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
F3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)
G3.30.379.10 Alpha Beta 2-Layer Sandwich Chitobiase domain 2CATH (4.3.0)
G3.20.20.80 Alpha Beta Alpha-Beta Barrel TIM Barrel GlycosidasesCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
A, D, E, H
PF14845beta-acetyl hexosaminidase like (Glycohydro_20b2)beta-acetyl hexosaminidase like- Domain
A, D, E, H
PF00728Glycosyl hydrolase family 20, catalytic domain (Glyco_hydro_20)Glycosyl hydrolase family 20, catalytic domainThis domain has a TIM barrel fold.Domain
B, C, F, G
PF14845beta-acetyl hexosaminidase like (Glycohydro_20b2)beta-acetyl hexosaminidase like- Domain
B, C, F, G
PF00728Glycosyl hydrolase family 20, catalytic domain (Glyco_hydro_20)Glycosyl hydrolase family 20, catalytic domainThis domain has a TIM barrel fold.Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
A, D, E, H
Beta-hexosaminidase alpha chain
B, C, F, G
Beta-hexosaminidase beta chain

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
A, D, E, H
PharosP06865
B, C, F, G
PharosP07686

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

ChainsEnzyme NameDescriptionCatalytic Residues
beta-N-acetylhexosaminidase  M-CSA #899

Chitin, the second most abundant polysaccharide on earth, is degraded by chitinases and chitobiases. This entry represents the glycosidase family 20 chitobiase which digests the beta-1,4-glycosidic bonds in N-acetylglucosamine (GlcNAc) oligomers (mainly dimers). It has a retaining mechanism. Human beta-hexosaminidase A

Defined by 2 residues: ASP:A-300 [auth A-322]GLU:A-301 [auth A-323]
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