ID A8K4K1_HUMAN Unreviewed; 415 AA.
AC A8K4K1;
DT 04-DEC-2007, integrated into UniProtKB/TrEMBL.
DT 04-DEC-2007, sequence version 1.
DT 27-MAR-2024, entry version 76.
DE RecName: Full=Sialidase-1 {ECO:0000256|ARBA:ARBA00040509};
DE EC=3.2.1.18 {ECO:0000256|ARBA:ARBA00012733};
DE AltName: Full=Lysosomal sialidase {ECO:0000256|ARBA:ARBA00041413};
DE AltName: Full=N-acetyl-alpha-neuraminidase 1 {ECO:0000256|ARBA:ARBA00041332};
OS Homo sapiens (Human).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia;
OC Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae;
OC Homo.
OX NCBI_TaxID=9606 {ECO:0000313|EMBL:BAF83655.1};
RN [1] {ECO:0000313|EMBL:BAF83655.1}
RP NUCLEOTIDE SEQUENCE.
RA Wakamatsu A., Yamamoto J., Kimura K., Ishii S., Watanabe K., Sugiyama A.,
RA Murakawa K., Kaida T., Tsuchiya K., Fukuzumi Y., Kumagai A., Oishi Y.,
RA Yamamoto S., Ono Y., Komori Y., Yamazaki M., Kisu Y., Nishikawa T.,
RA Sugano S., Nomura N., Isogai T.;
RT "NEDO human cDNA sequencing project.";
RL Submitted (OCT-2007) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the removal of sialic acid (N-acetylneuraminic
CC acid) moieties from glycoproteins and glycolipids. To be active, it is
CC strictly dependent on its presence in the multienzyme complex. Appears
CC to have a preference for alpha 2-3 and alpha 2-6 sialyl linkage.
CC {ECO:0000256|ARBA:ARBA00037235}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Hydrolysis of alpha-(2->3)-, alpha-(2->6)-, alpha-
CC (2->8)- glycosidic linkages of terminal sialic acid residues in
CC oligosaccharides, glycoproteins, glycolipids, colominic acid and
CC synthetic substrates.; EC=3.2.1.18;
CC Evidence={ECO:0000256|ARBA:ARBA00000427};
CC -!- SUBUNIT: Interacts with cathepsin A (protective protein), beta-
CC galactosidase and N-acetylgalactosamine-6-sulfate sulfatase in a
CC multienzyme complex. {ECO:0000256|ARBA:ARBA00038519}.
CC -!- SUBCELLULAR LOCATION: Cytoplasmic vesicle
CC {ECO:0000256|ARBA:ARBA00004541}. Lysosome lumen
CC {ECO:0000256|ARBA:ARBA00004227}. Lysosome membrane
CC {ECO:0000256|ARBA:ARBA00004207}; Peripheral membrane protein
CC {ECO:0000256|ARBA:ARBA00004207}; Lumenal side
CC {ECO:0000256|ARBA:ARBA00004207}.
CC -!- SIMILARITY: Belongs to the glycosyl hydrolase 33 family.
CC {ECO:0000256|ARBA:ARBA00009348}.
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DR EMBL; AK290966; BAF83655.1; -; mRNA.
DR AlphaFoldDB; A8K4K1; -.
DR PeptideAtlas; A8K4K1; -.
DR GO; GO:0043202; C:lysosomal lumen; IEA:UniProtKB-SubCell.
DR GO; GO:0005765; C:lysosomal membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0052794; F:exo-alpha-(2->3)-sialidase activity; IEA:UniProtKB-EC.
DR GO; GO:0052795; F:exo-alpha-(2->6)-sialidase activity; IEA:UniProtKB-EC.
DR GO; GO:0052796; F:exo-alpha-(2->8)-sialidase activity; IEA:UniProtKB-EC.
DR GO; GO:0016042; P:lipid catabolic process; IEA:UniProtKB-KW.
DR CDD; cd15482; Sialidase_non-viral; 1.
DR Gene3D; 2.120.10.10; -; 1.
DR InterPro; IPR011040; Sialidase.
DR InterPro; IPR026856; Sialidase_fam.
DR InterPro; IPR036278; Sialidase_sf.
DR PANTHER; PTHR10628; SIALIDASE; 1.
DR PANTHER; PTHR10628:SF25; SIALIDASE-1; 1.
DR Pfam; PF13088; BNR_2; 1.
DR SUPFAM; SSF50939; Sialidases; 1.
PE 2: Evidence at transcript level;
KW Lipid degradation {ECO:0000256|ARBA:ARBA00022963};
KW Lipid metabolism {ECO:0000256|ARBA:ARBA00022963};
KW Membrane {ECO:0000256|SAM:Phobius}; Signal {ECO:0000256|ARBA:ARBA00022729};
KW Transmembrane {ECO:0000256|SAM:Phobius};
KW Transmembrane helix {ECO:0000256|SAM:Phobius}.
FT TRANSMEM 20..42
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 88..377
FT /note="Sialidase"
FT /evidence="ECO:0000259|Pfam:PF13088"
SQ SEQUENCE 415 AA; 45338 MW; D60130A17715CDCE CRC64;
MTGERPSTAL PDRRWGPRIL GFWGGCRVWV FAAIFLLLSL AASGSKAEND FGLVQPLVTM
EQLLWVSGRQ IGSVDTFRIP LITATPRGTL LAFAEARKMS SSDEGAKFIA LRRSMDQGST
WSPTAFIVND GDVPDGLNLG AVVSDVETGV VFLFYSLCAH KAGCQVASTM LVWSKDDGVS
WSTPRNLSLD IGTEVFAPGP GSGIQKQREP RKGRLIVCGH GTLERDGVFC LLSDDHGASW
RYGSGVSGIP YGQPKQENDF NPDECQPYEL PDGSVVINAR NQNNYHCHCR IVLRSYDACD
TLRPRDVTFD PELVDPVVAA GAVVTSSGIV FFSNPAHPEF RVNLTLRWSF SNGTSWRKET
VQLWPGPSGY SSLATLEGSM DGEEQAPQLY VLYEKGRNHY TESISVAKIS VYGTL
//
