GNE (gene)

GNE
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2YHW, 2YHY, 2YI1, 3EO3, 4ZHT
Identifiers
Aliases	GNE, DMRV, GLCNE, IBM2, NM, Uae1, glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase
External IDs	OMIM: 603824; MGI: 1354951; HomoloGene: 3996; GeneCards: GNE; OMA:GNE - orthologs
Gene location (Human) Chr. Chromosome 9 (human) Band 9p13.3 Start 36,214,441 bp End 36,277,042 bp
Gene location (Mouse) Chr. Chromosome 4 (mouse) Band 4|4 B1 Start 44,034,075 bp End 44,084,177 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in mucosa of sigmoid colon nasal epithelium rectum liver trachea palpebral conjunctiva islet of Langerhans right lobe of liver cartilage tissue placenta Top expressed in submandibular gland left colon lacrimal gland parotid gland left lobe of liver Ileal epithelium Paneth cell duodenum conjunctival fornix crypt of lieberkuhn of small intestine More reference expression data BioGPS More reference expression data
Gene ontology Molecular function nucleotide binding protein binding hydrolase activity, hydrolyzing O-glycosyl compounds kinase activity ATP binding catalytic activity transferase activity N-acylmannosamine kinase activity hydrolase activity metal ion binding UDP-N-acetylglucosamine 2-epimerase activity Cellular component cytoplasm cytosol Biological process phosphorylation cell adhesion N-acetylneuraminate metabolic process metabolism UDP-N-acetylglucosamine metabolic process N-acetylglucosamine biosynthetic process carbohydrate phosphorylation Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 10020 50798 Ensembl ENSG00000159921 ENSMUSG00000028479 UniProt Q9Y223 Q91WG8 RefSeq (mRNA) NM_001128227 NM_001190383 NM_001190384 NM_001190388 NM_005476 NM_001374797 NM_001374798 NM_001190414 NM_015828 NM_001357539 RefSeq (protein) NP_001121699 NP_001177312 NP_001177313 NP_001177317 NP_005467 NP_001361726 NP_001361727 NP_001177343 NP_056643 NP_001344468 Location (UCSC) Chr 9: 36.21 – 36.28 Mb Chr 4: 44.03 – 44.08 Mb PubMed search
Wikidata
View/Edit Human View/Edit Mouse

Bifunctional UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase is an enzyme that in humans is encoded by the GNE gene.

The bifunctional enzyme, UDP-N-acetylglucosamine 2-epimerase (UDP-GlcNAc 2-epimerase/N-acetylmannosamine kinase) regulates and initiates biosynthesis of N-acetylneuraminic acid (NeuAc), a precursor of sialic acids. UDP-GlcNAc 2-epimerase activity is rate-limiting for the biosynthesis of sialic acid and is required for sialylation in hematopoietic cells. The activity of the enzyme can be controlled at the transcriptional level and can affect the sialylation and function of specific cell surface molecules expressed on B cells and myeloid cells. Modification of cell surface molecules with sialic acid is crucial for their function in many biologic processes, including cell adhesion and signal transduction. Differential sialylation of cell surface molecules is also implicated in the tumorigenicity and metastatic behavior of malignant cells. Sialuria is a rare inborn error of metabolism characterized by cytoplasmic accumulation and increased urinary excretion of free NeuAc.

Further reading

• Wilcken B, Don N, Greenaway R, et al. (1987). "Sialuria: a second case". J. Inherit. Metab. Dis. 10 (2): 97–102. doi:10.1007/BF01800030. PMID 2443758.
• Weiss P, Tietze F, Gahl WA, et al. (1989). "Identification of the metabolic defect in sialuria". J. Biol. Chem. 264 (30): 17635–6. PMID 2808337.
• Krasnewich DM, Tietze F, Krause W, et al. (1993). "Clinical and biochemical studies in an American child with sialuria" (PDF). Biochem. Med. Metab. Biol. 49 (1): 90–6. doi:10.1006/bmmb.1993.1010. PMID 8439453.
• Mitrani-Rosenbaum S, Argov Z, Blumenfeld A, et al. (1996). "Hereditary inclusion body myopathy maps to chromosome 9p1-q1". Hum. Mol. Genet. 5 (1): 159–163. doi:10.1093/hmg/5.1.159. PMID 8789455.
• Bonaldo MF, Lennon G, Soares MB (1997). "Normalization and subtraction: two approaches to facilitate gene discovery". Genome Res. 6 (9): 791–806. doi:10.1101/gr.6.9.791. PMID 8889548.
• Seppala R, Lehto VP, Gahl WA (1999). "Mutations in the human UDP-N-acetylglucosamine 2-epimerase gene define the disease sialuria and the allosteric site of the enzyme". Am. J. Hum. Genet. 64 (6): 1563–9. doi:10.1086/302411. PMC 1377899. PMID 10330343.
• Keppler OT, Hinderlich S, Langner J, et al. (1999). "UDP-GlcNAc 2-epimerase: a regulator of cell surface sialylation". Science. 284 (5418): 1372–6. doi:10.1126/science.284.5418.1372. PMID 10334995.
• Ferreira H, Seppala R, Pinto R, et al. (1999). "Sialuria in a Portuguese girl: clinical, biochemical, and molecular characteristics". Mol. Genet. Metab. 67 (2): 131–7. doi:10.1006/mgme.1999.2852. PMID 10356312.
• Lucka L, Krause M, Danker K, et al. (1999). "Primary structure and expression analysis of human UDP-N-acetyl-glucosamine-2-epimerase/N-acetylmannosamine kinase, the bifunctional enzyme in neuraminic acid biosynthesis". FEBS Lett. 454 (3): 341–4. doi:10.1016/S0014-5793(99)00837-6. PMID 10431835.
• Leroy JG, Seppala R, Huizing M, et al. (2001). "Dominant inheritance of sialuria, an inborn error of feedback inhibition". Am. J. Hum. Genet. 68 (6): 1419–27. doi:10.1086/320598. PMC 1226128. PMID 11326336.
• Eisenberg I, Avidan N, Potikha T, et al. (2001). "The UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase gene is mutated in recessive hereditary inclusion body myopathy". Nat. Genet. 29 (1): 83–7. doi:10.1038/ng718. PMID 11528398.
• Kovach MJ, Waggoner B, Leal SM, et al. (2002). "Clinical delineation and localization to chromosome 9p13.3-p12 of a unique dominant disorder in four families: hereditary inclusion body myopathy, Paget disease of bone, and frontotemporal dementia". Mol. Genet. Metab. 74 (4): 458–75. doi:10.1006/mgme.2001.3256. PMC 6277059. PMID 11749051.
• Kayashima T, Matsuo H, Satoh A, et al. (2002). "Nonaka myopathy is caused by mutations in the UDP-N-acetylglucosamine-2-epimerase/N-acetylmannosamine kinase gene (GNE)". J. Hum. Genet. 47 (2): 77–9. doi:10.1007/s100380200004. PMID 11916006.
• Tomimitsu H, Ishikawa K, Shimizu J, et al. (2002). "Distal myopathy with rimmed vacuoles: novel mutations in the GNE gene". Neurology. 59 (3): 451–4. doi:10.1212/wnl.59.3.451. PMID 12177386.
• Arai A, Tanaka K, Ikeuchi T, et al. (2002). "A novel mutation in the GNE gene and a linkage disequilibrium in Japanese pedigrees". Ann. Neurol. 52 (4): 516–9. doi:10.1002/ana.10341. PMID 12325084.
• Darvish D, Vahedifar P, Huo Y (2003). "Four novel mutations associated with autosomal recessive inclusion body myopathy (MIM: 600737)". Mol. Genet. Metab. 77 (3): 252–6. doi:10.1016/S1096-7192(02)00141-5. PMID 12409274.
• Nishino I, Noguchi S, Murayama K, et al. (2003). "Distal myopathy with rimmed vacuoles is allelic to hereditary inclusion body myopathy". Neurology. 59 (11): 1689–93. doi:10.1212/01.wnl.0000041631.28557.c6. PMID 12473753.
• Vasconcelos OM, Raju R, Dalakas MC (2003). "GNE mutations in an American family with quadriceps-sparing IBM and lack of mutations in s-IBM". Neurology. 59 (11): 1776–9. doi:10.1212/01.wnl.0000039780.13681.ad. PMID 12473769.

External links

• GNE human gene location in the UCSC Genome Browser.
• GNE human gene details in the UCSC Genome Browser.
• GeneReviews/NCBI/NIH/UW entry on Sialuria