NAGPA

N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase
Identifiers
Symbols	NAGPA; APAA; UCE
External IDs	OMIM: 607985 MGI: 1351598 HomoloGene: 8466 ChEMBL: 5920 GeneCards: NAGPA Gene
EC number	3.1.4.45
Gene Ontology Molecular function • N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase activity Cellular component • integral to membrane • Golgi cisterna membrane Biological process • carbohydrate metabolic process • cellular protein modification process • protein glycosylation • protein targeting to lysosome • lysosome organization Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	51172	27426
Ensembl	ENSG00000103174	ENSMUSG00000023143
UniProt	Q9UK23	Q8BJ48
RefSeq (mRNA)	NM_016256	NM_013796
RefSeq (protein)	NP_057340	NP_038824
Location (UCSC)	Chr 16: 5.07 – 5.08 Mb	Chr 16: 5.2 – 5.2 Mb
PubMed search	[1]	[2]

N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase is an enzyme that in humans is encoded by the NAGPA gene.

Hydrolases are transported to lysosomes after binding to mannose 6-phosphate receptors in the trans-Golgi network. This gene encodes the enzyme that catalyzes the second step in the formation of the mannose 6-phosphate recognition marker on lysosomal hydrolases. Commonly known as 'uncovering enzyme' or UCE, this enzyme removes N-acetyl-D-glucosamine (GlcNAc) residues from GlcNAc-alpha-P-mannose moieties and thereby produces the recognition marker. This reaction most likely occurs in the trans-Golgi network. This enzyme functions as a homotetramer of two disulfide-linked homodimers. In addition to having an N-terminal signal peptide, the protein's C-terminus contains multiple signals for trafficking it between lysosomes, the plasma membrane, and trans-Golgi network.

Further reading

• Lee JK, Pierce M (1995). "Purification and characterization of human serum N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase.". Arch. Biochem. Biophys. 319 (2): 413–25. doi:10.1006/abbi.1995.1312. PMID 7786023. 
• Andersson B, Wentland MA, Ricafrente JY, et al. (1996). "A "double adaptor" method for improved shotgun library construction.". Anal. Biochem. 236 (1): 107–13. doi:10.1006/abio.1996.0138. PMID 8619474. 
• Page T, Zhao KW, Tao L, Miller AL (1997). "Purification and characterization of human lymphoblast N-acetylglucosamine-1-phosphodiester alpha-N-acetylglucosaminidase.". Glycobiology 6 (6): 619–26. doi:10.1093/glycob/6.6.619. PMID 8922957. 
• Yu W, Andersson B, Worley KC, et al. (1997). "Large-scale concatenation cDNA sequencing.". Genome Res. 7 (4): 353–8. doi:10.1101/gr.7.4.353. PMC 139146. PMID 9110174. 
• Rohrer J, Kornfeld R (2001). "Lysosomal hydrolase mannose 6-phosphate uncovering enzyme resides in the trans-Golgi network.". Mol. Biol. Cell 12 (6): 1623–31. PMC 37329. PMID 11408573. 
• Lee WS, Rohrer J, Kornfeld R, Kornfeld S (2002). "Multiple signals regulate trafficking of the mannose 6-phosphate-uncovering enzyme.". J. Biol. Chem. 277 (5): 3544–51. doi:10.1074/jbc.M108531200. PMID 11723124. 
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932. 
• Ota T, Suzuki Y, Nishikawa T, et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039. 
• Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334. 
• Nair P, Schaub BE, Huang K, et al. (2005). "Characterization of the TGN exit signal of the human mannose 6-phosphate uncovering enzyme.". J. Cell. Sci. 118 (Pt 13): 2949–56. doi:10.1242/jcs.02434. PMID 15976452.