NEU1

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Identifiers
Aliases
External IDs	GeneCards: [1]
Orthologs
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
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Wikidata
View/Edit Human

Sialidase 1 (lysosomal sialidase), also known as NEU1 is a mammalian lysosomal neuraminidase enzyme which in humans is encoded by the NEU1 gene.

Function

The protein encoded by this gene encodes the lysosomal enzyme, which cleaves terminal sialic acid residues from substrates such as glycoproteins and glycolipids. In the lysosome, this enzyme is part of a heterotrimeric complex together with beta-galactosidase and cathepsin A (the latter also referred to as 'protective protein'). Mutations in this gene can lead to sialidosis.

Clinical significance

Deficiencies in the human enzyme NEU1 leads to sialidosis, a rare lysosomal storage disease. Sialidase has also been shown to enhance recovery from spinal cord contusion injury when injected in rats.

Interactions

NEU1 has been shown to interact with Cathepsin A.

Further reading

• Okamura-Oho Y, Zhang S, Callahan JW (1994). "The biochemistry and clinical features of galactosialidosis". Biochim. Biophys. Acta. 1225 (3): 244–54. doi:10.1016/0925-4439(94)90002-7. PMID 8312369.
• Seyrantepe V, Poupetova H, Froissart R, Zabot MT, Maire I, Pshezhetsky AV (2004). "Molecular pathology of NEU1 gene in sialidosis". Hum. Mutat. 22 (5): 343–52. doi:10.1002/humu.10268. PMID 14517945.
• Verheijen FW, Palmeri S, Galjaard H (1987). "Purification and partial characterization of lysosomal neuraminidase from human placenta". Eur. J. Biochem. 162 (1): 63–7. doi:10.1111/j.1432-1033.1987.tb10542.x. PMID 3102233.
• Verheijen FW, Palmeri S, Hoogeveen AT, Galjaard H (1985). "Human placental neuraminidase. Activation, stabilization and association with beta-galactosidase and its protective protein". Eur. J. Biochem. 149 (2): 315–21. doi:10.1111/j.1432-1033.1985.tb08928.x. PMID 3922758.
• Hu H, Shioda T, Moriya C, Xin X, Hasan MK, Miyake K, Shimada T, Nagai Y (1996). "Infectivities of human and other primate lentiviruses are activated by desialylation of the virion surface". J. Virol. 70 (11): 7462–70. PMC 190813. PMID 8892864.
• Pshezhetsky AV, Potier M (1996). "Association of N-acetylgalactosamine-6-sulfate sulfatase with the multienzyme lysosomal complex of beta-galactosidase, cathepsin A, and neuraminidase. Possible implication for intralysosomal catabolism of keratan sulfate". J. Biol. Chem. 271 (45): 28359–65. doi:10.1074/jbc.271.45.28359. PMID 8910459.
• Bonten E, van der Spoel A, Fornerod M, Grosveld G, d'Azzo A (1997). "Characterization of human lysosomal neuraminidase defines the molecular basis of the metabolic storage disorder sialidosis". Genes Dev. 10 (24): 3156–69. doi:10.1101/gad.10.24.3156. PMID 8985184. * Milner CM, Smith SV, Carrillo MB, Taylor GL, Hollinshead M, Campbell RD (1997). "Identification of a sialidase encoded in the human major histocompatibility complex". J. Biol. Chem. 272 (7): 4549–58. doi:10.1074/jbc.272.7.4549. PMID 9020182.
• Pshezhetsky AV, Richard C, Michaud L, Igdoura S, Wang S, Elsliger MA, Qu J, Leclerc D, Gravel R, Dallaire L, Potier M (1997). "Cloning, expression and chromosomal mapping of human lysosomal sialidase and characterization of mutations in sialidosis". Nat. Genet. 15 (3): 316–20. doi:10.1038/ng0397-316. PMID 9054950.
• Vinogradova MV, Michaud L, Mezentsev AV, Lukong KE, El-Alfy M, Morales CR, Potier M, Pshezhetsky AV (1998). "Molecular mechanism of lysosomal sialidase deficiency in galactosialidosis involves its rapid degradation". Biochem. J. 330 ( Pt 2) (Pt 2): 641–50. PMC 1219185. PMID 9480870.
• van der Spoel A, Bonten E, d'Azzo A (1998). "Transport of human lysosomal neuraminidase to mature lysosomes requires protective protein/cathepsin A". EMBO J. 17 (6): 1588–97. doi:10.1093/emboj/17.6.1588. PMC 1170506. PMID 9501080.
• Lukong KE, Elsliger MA, Chang Y, Richard C, Thomas G, Carey W, Tylki-Szymanska A, Czartoryska B, Buchholz T, Criado GR, Palmeri S, Pshezhetsky AV (2000). "Characterization of the sialidase molecular defects in sialidosis patients suggests the structural organization of the lysosomal multienzyme complex". Hum. Mol. Genet. 9 (7): 1075–85. doi:10.1093/hmg/9.7.1075. PMID 10767332.
• Naganawa Y, Itoh K, Shimmoto M, Takiguchi K, Doi H, Nishizawa Y, Kobayashi T, Kamei S, Lukong KE, Pshezhetsky AV, Sakuraba H (2000). "Molecular and structural studies of Japanese patients with sialidosis type 1". J. Hum. Genet. 45 (4): 241–9. doi:10.1007/s100380070034. PMID 10944856.
• Bonten EJ, Arts WF, Beck M, Covanis A, Donati MA, Parini R, Zammarchi E, d'Azzo A (2000). "Novel mutations in lysosomal neuraminidase identify functional domains and determine clinical severity in sialidosis". Hum. Mol. Genet. 9 (18): 2715–25. doi:10.1093/hmg/9.18.2715. PMID 11063730.
• Lukong KE, Landry K, Elsliger MA, Chang Y, Lefrancois S, Morales CR, Pshezhetsky AV (2001). "Mutations in sialidosis impair sialidase binding to the lysosomal multienzyme complex". J. Biol. Chem. 276 (20): 17286–90. doi:10.1074/jbc.M100460200. PMID 11279074.
• Penzel R, Uhl J, Kopitz J, Beck M, Otto HF, Cantz M (2001). "Splice donor site mutation in the lysosomal neuraminidase gene causing exon skipping and complete loss of enzyme activity in a sialidosis patient". FEBS Lett. 501 (2–3): 135–8. doi:10.1016/S0014-5793(01)02645-X. PMID 11470272. * Lukong KE, Seyrantepe V, Landry K, Trudel S, Ahmad A, Gahl WA, Lefrancois S, Morales CR, Pshezhetsky AV (2002). "Intracellular distribution of lysosomal sialidase is controlled by the internalization signal in its cytoplasmic tail". J. Biol. Chem. 276 (49): 46172–81. doi:10.1074/jbc.M104547200. PMID 11571282.
• Sergi C, Penzel R, Uhl J, Zoubaa S, Dietrich H, Decker N, Rieger P, Kopitz J, Otto HF, Kiessling M, Cantz M (2001). "Prenatal diagnosis and fetal pathology in a Turkish family harboring a novel nonsense mutation in the lysosomal alpha-N-acetyl-neuraminidase (sialidase) gene". Hum. Genet. 109 (4): 421–8. doi:10.1007/s004390100592. PMID 11702224.
• Itoh K, Naganawa Y, Matsuzawa F, Aikawa S, Doi H, Sasagasako N, Yamada T, Kira J, Kobayashi T, Pshezhetsky AV, Sakuraba H (2002). "Novel missense mutations in the human lysosomal sialidase gene in sialidosis patients and prediction of structural alterations of mutant enzymes". J. Hum. Genet. 47 (1): 29–37. doi:10.1007/s10038-002-8652-7. PMID 11829139.