ID A0A091RB31_MERNU Unreviewed; 407 AA.
AC A0A091RB31;
DT 26-NOV-2014, integrated into UniProtKB/TrEMBL.
DT 26-NOV-2014, sequence version 1.
DT 27-MAR-2024, entry version 26.
DE RecName: Full=Beta-hexosaminidase subunit beta {ECO:0000256|ARBA:ARBA00040637};
DE EC=3.2.1.52 {ECO:0000256|ARBA:ARBA00012663};
DE AltName: Full=Beta-N-acetylhexosaminidase subunit beta {ECO:0000256|ARBA:ARBA00042342};
DE AltName: Full=N-acetyl-beta-glucosaminidase subunit beta {ECO:0000256|ARBA:ARBA00042832};
DE Flags: Fragment;
GN ORFNames=N331_08746 {ECO:0000313|EMBL:KFQ25440.1};
OS Merops nubicus (Northern carmine bee-eater).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC Coelurosauria; Aves; Neognathae; Coraciiformes; Meropidae; Merops.
OX NCBI_TaxID=57421 {ECO:0000313|EMBL:KFQ25440.1, ECO:0000313|Proteomes:UP000052967};
RN [1] {ECO:0000313|EMBL:KFQ25440.1, ECO:0000313|Proteomes:UP000052967}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=BGI_N331 {ECO:0000313|EMBL:KFQ25440.1};
RA Zhang G., Li C.;
RT "Genome evolution of avian class.";
RL Submitted (APR-2014) to the EMBL/GenBank/DDBJ databases.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + N-acetyl-beta-D-6-sulfogalactosaminyl-(1->4)-alpha-L-
CC iduronyl-(1->3)-N-acetyl-D-6-sulfogalactosamine = alpha-L-iduronyl-
CC (1->3)-N-acetyl-D-6-sulfogalactosamine + N-acetyl-D-6-
CC sulfogalactosamine; Xref=Rhea:RHEA:64384, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:152567, ChEBI:CHEBI:152568, ChEBI:CHEBI:153064;
CC Evidence={ECO:0000256|ARBA:ARBA00023541};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:64385;
CC Evidence={ECO:0000256|ARBA:ARBA00023541};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H2O + N-acetyl-beta-D-galactosaminyl-(1->4)-beta-D-3-
CC sulfogalactosyl-(1->4)-beta-D-glucosyl-(1<->1')-ceramide = a beta-D-
CC 3-sulfogalactosyl-(1->4)-beta-D-glucosyl-(1<->1')-ceramide + N-
CC acetyl-beta-D-galactosamine; Xref=Rhea:RHEA:48276, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:28497, ChEBI:CHEBI:90163, ChEBI:CHEBI:90164;
CC Evidence={ECO:0000256|ARBA:ARBA00023953};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:48277;
CC Evidence={ECO:0000256|ARBA:ARBA00023953};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Hydrolysis of terminal non-reducing N-acetyl-D-hexosamine
CC residues in N-acetyl-beta-D-hexosaminides.; EC=3.2.1.52;
CC Evidence={ECO:0000256|ARBA:ARBA00001231};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a ganglioside GM2 (d18:1(4E)) + H2O = a ganglioside GM3
CC (d18:1(4E)) + N-acetyl-beta-D-galactosamine; Xref=Rhea:RHEA:47940,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:28497, ChEBI:CHEBI:60065,
CC ChEBI:CHEBI:71502; Evidence={ECO:0000256|ARBA:ARBA00043767};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:47941;
CC Evidence={ECO:0000256|ARBA:ARBA00043767};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a ganglioside GM2 + H2O = a ganglioside GM3 + N-acetyl-beta-D-
CC galactosamine; Xref=Rhea:RHEA:47968, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:28497, ChEBI:CHEBI:79210, ChEBI:CHEBI:79218;
CC Evidence={ECO:0000256|ARBA:ARBA00043827};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:47969;
CC Evidence={ECO:0000256|ARBA:ARBA00043827};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=beta-D-GalNAc-(1->4)-alpha-L-IdoA-(1->3)-beta-D-GalNAc-4-
CC sulfate-(1->4)-alpha-L-IdoA-(1->3)-D-GalNAc-4-sulfate + H2O = alpha-
CC L-IdoA-(1->3)-beta-D-GalNAc-4-sulfate-(1->4)-alpha-L-IdoA-(1->3)-D-
CC GalNAc-4-sulfate + N-acetyl-D-galactosamine; Xref=Rhea:RHEA:64372,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:28037, ChEBI:CHEBI:152565,
CC ChEBI:CHEBI:152566; Evidence={ECO:0000256|ARBA:ARBA00023505};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:64373;
CC Evidence={ECO:0000256|ARBA:ARBA00023505};
CC -!- SUBCELLULAR LOCATION: Cytoplasmic vesicle, secretory vesicle, Cortical
CC granule {ECO:0000256|ARBA:ARBA00037865}. Lysosome
CC {ECO:0000256|ARBA:ARBA00004371}.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 20 family.
CC {ECO:0000256|ARBA:ARBA00006285}.
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DR EMBL; KK697830; KFQ25440.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A091RB31; -.
DR Proteomes; UP000052967; Unassembled WGS sequence.
DR GO; GO:0060473; C:cortical granule; IEA:UniProtKB-SubCell.
DR GO; GO:0005764; C:lysosome; IEA:UniProtKB-SubCell.
DR GO; GO:0004563; F:beta-N-acetylhexosaminidase activity; IEA:UniProtKB-EC.
DR GO; GO:0102148; F:N-acetyl-beta-D-galactosaminidase activity; IEA:UniProtKB-EC.
DR GO; GO:1901135; P:carbohydrate derivative metabolic process; IEA:UniProt.
DR GO; GO:0005975; P:carbohydrate metabolic process; IEA:InterPro.
DR CDD; cd06562; GH20_HexA_HexB-like; 1.
DR Gene3D; 3.30.379.10; Chitobiase/beta-hexosaminidase domain 2-like; 1.
DR Gene3D; 3.20.20.80; Glycosidases; 1.
DR InterPro; IPR025705; Beta_hexosaminidase_sua/sub.
DR InterPro; IPR015883; Glyco_hydro_20_cat.
DR InterPro; IPR017853; Glycoside_hydrolase_SF.
DR InterPro; IPR029018; Hex-like_dom2.
DR PANTHER; PTHR22600; BETA-HEXOSAMINIDASE; 1.
DR PANTHER; PTHR22600:SF38; BETA-HEXOSAMINIDASE SUBUNIT BETA; 1.
DR Pfam; PF00728; Glyco_hydro_20; 1.
DR PRINTS; PR00738; GLHYDRLASE20.
DR SUPFAM; SSF51445; (Trans)glycosidases; 1.
DR SUPFAM; SSF55545; beta-N-acetylhexosaminidase-like domain; 1.
PE 3: Inferred from homology;
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801};
KW Reference proteome {ECO:0000313|Proteomes:UP000052967}.
FT DOMAIN 51..367
FT /note="Glycoside hydrolase family 20 catalytic"
FT /evidence="ECO:0000259|Pfam:PF00728"
FT ACT_SITE 206
FT /note="Proton donor"
FT /evidence="ECO:0000256|PIRSR:PIRSR625705-1"
FT NON_TER 1
FT /evidence="ECO:0000313|EMBL:KFQ25440.1"
FT NON_TER 407
FT /evidence="ECO:0000313|EMBL:KFQ25440.1"
SQ SEQUENCE 407 AA; 47052 MW; A7A4DF77E51CBF9B CRC64;
HLTVTEPVAV LKADEVWGAL RGLETFSQLV HEDDYGSFLV NESEIYDFPR FAHRGILLDT
SRHYLPLKSI LTNLDAMAFN KFNVLHWHIV DDQSFPYQSI YFPELSDKGA YSYNHIYTPL
DVHLVIEYAR LRGIRVIPEF DTPGHTQSWG KGQKDLLTPC YNGEQPSGSF GPVNPILNTT
YDFMTKFFKE ISSVFPDAYI HLGGDEVNFD CWKSNPEVKE FMKKQGFGID YAKLESYYIQ
KILDVVSSYN KGYMVWQEVF DNKVELKRDT VVQVWMENNY AHELSRVTGA GFTAILAAPW
YLDYISYGQD WKKYYSVEPR NFPGSEEQKR LLIGGEACLW GEYVDATNLT PRLWPRASAV
GERLWSSRNV TNLRDAYDRL TNHRCRMLRR GIAAEPVFIG YCAHEAR
//
