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FLASH GENE
Symbol GNE contributors: mct/npt - updated : 25-03-2013
HGNC name glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase
HGNC id 23657
Corresponding disease
DMRV myopathy, distal, with rimmed vacuoles
IBM2 inclusion body myopathy 2
SIAFT sialuria, French type
Location 9p13.3      Physical location : 36.214.440 - 36.277.053
Synonym name
  • UDP-GlcNAc-2-epimerase/ManAc kinase
  • N-acylmannosamine kinase
  • Synonym symbol(s) GLCNE, NM, DMRV, IBM2, Uae1
    EC.number 2.7.1.60, 5.1.3.14
    DNA
    TYPE like-sequence
    STRUCTURE 62.62 kb     13 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    MAPPING cloned Y linked N status provisional
    Map pter - D9S929 - D9S1794 - GNE - D9S1209 - D9S1221 - cen
    regionally located 78kb telomeric to RNF38
    RNA
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    12 - 5313 - 753 - 2009 18815882
  • GNE2
  • a 31 AA N-terminal extension compared to GNE1
  • displayed selective reduction of UDP-GlcNAc 2-epimerase activity by the loss of its tetrameric state, which is essential for full enzyme activity
  • role of GNE1 in basic supply of cells with sialic acids, whereas GNE2 and GNE3 may have a function in fine-tuning of the sialic acid pathway
  • 12 - 5329 - 722 - 2009 18815882
  • GNE1
  • role of GNE1 in basic supply of cells with sialic acids, whereas GNE2 and GNE3 may have a function in fine-tuning of the sialic acid pathway
  • 11 - 5107 - 717 - 2009 18815882
  • GNE3
  • a 55-AA N-terminal deletion and a 50-AA N-terminal extension compared to GNE1
  • epimerase enzymatic activity of GNE3 and GNE8 is likely absent, because the deleted fragment contains important substrate binding residues in homologous bacterial epimerases
  • role of GNE1 in basic supply of cells with sialic acids, whereas GNE2 and GNE3 may have a function in fine-tuning of the sialic acid pathway
  • 10 - 4970 - 612 - 2009 18815882
    11 - 5107 - 648 - 2009 18815882
    EXPRESSION
    Type widely
       expressed in (based on citations)
    organ(s)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Endocrinepancreas    
    Reproductivefemale systembreastmammary gland  
     female systemuteruscervix  
    Skin/Tegumentskin    
    tissue
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Epithelialabsorptive excretorydigestive epithelium  
    Epithelialbarrier/lininguroepithelium  
    Epithelialsecretoryglandularexocrine 
    Muscularstriatumskeletal  
    cell lineage
    cell lines
    fluid/secretion
    at STAGE
    physiological period pregnancy
    Text placenta
    PROTEIN
    PHYSICAL PROPERTIES Hydrophilic
    STRUCTURE
    motifs/domains
  • two functional domains
  • an epimerase domain
  • a kinase domain (Eisenberg 2008)
  • HOMOLOGY
    interspecies homolog to murine Uac1
    Homologene
    FAMILY
  • ROK family
  • CATEGORY enzyme
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,cytoplasm,cytosolic
    basic FUNCTION
  • key enzyme of sialic acid biosynthesis
  • biosynthesis of N-acetylneuraminic acid catalyzing the first step rate limiting in sialic acid biosynthesis
  • bi-functional enzyme acting in the biosynthetic pathway of sialic acid
  • a bifunctional enzyme which catalyzes the two key sequential steps in the biosynthetic pathway of sialic acid, the most abundant terminal monosaccharide on glycoconjugates of eukaryotic cells
  • plays an important role in neuronal cell and brain development, and is strongly involved in cardiac tissue and skeletal muscle early survival and organization
  • catalyzes the first two committed steps in sialic acid synthesis
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism carbohydrate
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • interacting with CRMP1 and ZBTB16
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s) IBM2 , DMRV , SIAFT
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral       gain of function
    occurred predominantly in pancreatic cancer but also in other malignancies
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS