ID I3KE29_ORENI Unreviewed; 479 AA.
AC I3KE29;
DT 11-JUL-2012, integrated into UniProtKB/TrEMBL.
DT 17-JUN-2020, sequence version 2.
DT 27-MAR-2024, entry version 58.
DE RecName: Full=Beta-hexosaminidase subunit alpha {ECO:0000256|ARBA:ARBA00040940};
DE EC=3.2.1.52 {ECO:0000256|ARBA:ARBA00012663};
DE AltName: Full=Beta-N-acetylhexosaminidase subunit alpha {ECO:0000256|ARBA:ARBA00041405};
DE AltName: Full=N-acetyl-beta-glucosaminidase subunit alpha {ECO:0000256|ARBA:ARBA00043190};
GN Name=hexa {ECO:0000313|Ensembl:ENSONIP00000019374.2};
OS Oreochromis niloticus (Nile tilapia) (Tilapia nilotica).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Actinopterygii; Neopterygii; Teleostei; Neoteleostei; Acanthomorphata;
OC Ovalentaria; Cichlomorphae; Cichliformes; Cichlidae; African cichlids;
OC Pseudocrenilabrinae; Oreochromini; Oreochromis.
OX NCBI_TaxID=8128 {ECO:0000313|Ensembl:ENSONIP00000019374.2, ECO:0000313|Proteomes:UP000005207};
RN [1] {ECO:0000313|Proteomes:UP000005207}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RG Broad Institute Genome Assembly Team;
RG Broad Institute Sequencing Platform;
RA Di Palma F., Johnson J., Lander E.S., Lindblad-Toh K.;
RT "The Genome Sequence of Oreochromis niloticus (Nile Tilapia).";
RL Submitted (JAN-2012) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|Ensembl:ENSONIP00000019374.2}
RP IDENTIFICATION.
RG Ensembl;
RL Submitted (NOV-2023) to UniProtKB.
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: Lysosome {ECO:0000256|ARBA:ARBA00004371}.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 20 family.
CC {ECO:0000256|ARBA:ARBA00006285}.
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DR AlphaFoldDB; I3KE29; -.
DR Ensembl; ENSONIT00000019391.2; ENSONIP00000019374.2; ENSONIG00000015399.2.
DR GeneTree; ENSGT00390000008107; -.
DR HOGENOM; CLU_007082_0_3_1; -.
DR Proteomes; UP000005207; Linkage group LG7.
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 GO; GO:0006629; P:lipid metabolic process; IEA:UniProtKB-KW.
DR CDD; cd06562; GH20_HexA_HexB-like; 1.
DR Gene3D; 3.30.379.10; Chitobiase/beta-hexosaminidase domain 2-like; 2.
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 InterPro; IPR029019; HEX_eukaryotic_N.
DR PANTHER; PTHR22600; BETA-HEXOSAMINIDASE; 1.
DR PANTHER; PTHR22600:SF39; BETA-HEXOSAMINIDASE SUBUNIT ALPHA; 1.
DR Pfam; PF00728; Glyco_hydro_20; 1.
DR Pfam; PF14845; Glycohydro_20b2; 1.
DR PIRSF; PIRSF001093; B-hxosamndse_ab_euk; 2.
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 Disulfide bond {ECO:0000256|ARBA:ARBA00023157};
KW Glycosidase {ECO:0000256|ARBA:ARBA00023295};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801};
KW Reference proteome {ECO:0000313|Proteomes:UP000005207};
KW Signal {ECO:0000256|SAM:SignalP}; Zymogen {ECO:0000256|ARBA:ARBA00023145}.
FT SIGNAL 1..16
FT /evidence="ECO:0000256|SAM:SignalP"
FT CHAIN 17..479
FT /note="Beta-hexosaminidase subunit alpha"
FT /evidence="ECO:0000256|SAM:SignalP"
FT /id="PRO_5025369250"
FT DOMAIN 17..68
FT /note="Beta-hexosaminidase eukaryotic type N-terminal"
FT /evidence="ECO:0000259|Pfam:PF14845"
FT DOMAIN 117..436
FT /note="Glycoside hydrolase family 20 catalytic"
FT /evidence="ECO:0000259|Pfam:PF00728"
FT ACT_SITE 273
FT /note="Proton donor"
FT /evidence="ECO:0000256|PIRSR:PIRSR001093-1"
SQ SEQUENCE 479 AA; 55197 MW; E3C30F0EAD64A052 CRC64;
LYFLFIIILG LHSVEGVWPL PQSITSSPER YPLNPQAFYF TYGSQSAAQE GCSVLDEAFK
RYFSLIFPDY SSGRFYSEVK FLQWKNESLE TFSQLVYQED FGSYYVNKTE IEDFPRFQFR
GILLDTSRHY LPVQAILKTL DAMAFSKFNV FHWHIVDDPS FPYQSRTFPD LSAKGAFHPM
THIYTQLDVR RVISYARMRG IRVLPEFDSP GHTQSWGKGQ SDLLTPCYSG STPSGTFGPV
NPILPSTYKF MATLFKEVSS VFPDSYIHLG GDEVNFSCWK SNPDVRAFML KMGFGADFTK
LEAYYMENIV NLTAALNRTS IVWQDVFDYH ERIPKDTVLH IWKGVPASYE AELRAITKAG
YRVLLAAPWY INHISYGQDW RNYYTVQPLN FSGTEEQKKL VIGGEVCMWG EYVDATNLTP
RLWPRASAAA ERLWSDEKQT SDVDKAFPRL KDFRCELLRR GIQAEPLFVG HCKHEYQGV
//
