ID E4XYB1_OIKDI Unreviewed; 519 AA.
AC E4XYB1;
DT 08-FEB-2011, integrated into UniProtKB/TrEMBL.
DT 08-FEB-2011, sequence version 1.
DT 27-MAR-2024, entry version 35.
DE RecName: Full=beta-N-acetylhexosaminidase {ECO:0000256|ARBA:ARBA00012663};
DE EC=3.2.1.52 {ECO:0000256|ARBA:ARBA00012663};
GN ORFNames=GSOID_T00009686001 {ECO:0000313|EMBL:CBY14639.1};
OS Oikopleura dioica (Tunicate).
OC Eukaryota; Metazoa; Chordata; Tunicata; Appendicularia; Copelata;
OC Oikopleuridae; Oikopleura.
OX NCBI_TaxID=34765 {ECO:0000313|EMBL:CBY14639.1};
RN [1] {ECO:0000313|EMBL:CBY14639.1}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=21097902; DOI=10.1126/science.1194167;
RA Denoeud F., Henriet S., Mungpakdee S., Aury J.M., Da Silva C.,
RA Brinkmann H., Mikhaleva J., Olsen L.C., Jubin C., Canestro C.,
RA Bouquet J.M., Danks G., Poulain J., Campsteijn C., Adamski M., Cross I.,
RA Yadetie F., Muffato M., Louis A., Butcher S., Tsagkogeorga G., Konrad A.,
RA Singh S., Jensen M.F., Cong E.H., Eikeseth-Otteraa H., Noel B.,
RA Anthouard V., Porcel B.M., Kachouri-Lafond R., Nishino A., Ugolini M.,
RA Chourrout P., Nishida H., Aasland R., Huzurbazar S., Westhof E., Delsuc F.,
RA Lehrach H., Reinhardt R., Weissenbach J., Roy S.W., Artiguenave F.,
RA Postlethwait J.H., Manak J.R., Thompson E.M., Jaillon O., Du Pasquier L.,
RA Boudinot P., Liberles D.A., Volff J.N., Philippe H., Lenhard B.,
RA Roest Crollius H., Wincker P., Chourrout D.;
RT "Plasticity of animal genome architecture unmasked by rapid evolution of a
RT pelagic tunicate.";
RL Science 330:1381-1385(2010).
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 -!- SIMILARITY: Belongs to the glycosyl hydrolase 20 family.
CC {ECO:0000256|ARBA:ARBA00006285}.
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DR EMBL; FN653316; CBY14639.1; -; Genomic_DNA.
DR AlphaFoldDB; E4XYB1; -.
DR InParanoid; E4XYB1; -.
DR Proteomes; UP000001307; Unassembled WGS sequence.
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:0005975; P:carbohydrate metabolic process; IEA:InterPro.
DR Gene3D; 3.20.20.80; Glycosidases; 2.
DR InterPro; IPR025705; Beta_hexosaminidase_sua/sub.
DR InterPro; IPR015883; Glyco_hydro_20_cat.
DR InterPro; IPR017853; Glycoside_hydrolase_SF.
DR PANTHER; PTHR22600; BETA-HEXOSAMINIDASE; 1.
DR PANTHER; PTHR22600:SF21; BETA-HEXOSAMINIDASE A; 1.
DR Pfam; PF00728; Glyco_hydro_20; 2.
DR PRINTS; PR00738; GLHYDRLASE20.
DR SUPFAM; SSF51445; (Trans)glycosidases; 1.
PE 3: Inferred from homology;
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801};
KW Reference proteome {ECO:0000313|Proteomes:UP000001307}.
FT DOMAIN 64..269
FT /note="Glycoside hydrolase family 20 catalytic"
FT /evidence="ECO:0000259|Pfam:PF00728"
FT DOMAIN 303..342
FT /note="Glycoside hydrolase family 20 catalytic"
FT /evidence="ECO:0000259|Pfam:PF00728"
FT ACT_SITE 257
FT /note="Proton donor"
FT /evidence="ECO:0000256|PIRSR:PIRSR625705-1"
SQ SEQUENCE 519 AA; 60458 MW; 4D6290B24D0DD99C CRC64;
MDGAIFPSKL GEVKLFNRTL EDKWKSWDED GGLRRYERYA PVTGDSCPPS NRLQERSLKQ
PSHFTYRGMF IDLSRNWFPV HRSKNLNYDD FLKLIVDISA ELELTHLHLH LSDDQGWRIQ
IPDLPELTDF APQDTAEGDE DYRFIPRYEF VDLLQYADKR RIKIVPEIDM PAHSRAAVKS
MEYRAFVTGD ETYRLDDPEE TYDTSSWGRT FDGTMSPCRP STFVFIDKVV REMKNNYVDA
GLWSDEDPPL FHIGGDETPP TSWQNSPIYR PMNFYANADY TNFGDEYQSG EVCRANPSHC
PELLKPENII GIQGHLWSET MRNPEMLLGQ LFPRMMAIAD RAKYTRSWEL SNETGLAILK
NRHFIYDWCE FKENTKQMMT KLSFVTDSFF FRLPLVGTKI SSWEGLKLAN ELDLEMRFRI
KDDQNGSPSF REIKFSAQNE FLLYDHMNDQ DKQNYPSGSE VTLEFVTVFY KGTTDGSIEF
YPQTSRVQEV QYKIQYTTAS SELCLLSSLT LMLISVVLF
//
