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FLASH GENE
Symbol NNT contributors: npt/mct - updated : 25-03-2015
HGNC name nicotinamide nucleotide transhydrogenase
HGNC id 7863
Corresponding disease
FGCD4 familial isolated glucocorticoid deficiency 4
Location 5p12      Physical location : 43.602.790 - 43.705.667
Synonym name
  • NAD(P) transhydrogenase
  • pyridine nucleotide transhydrogenase
  • Synonym symbol(s) MGC126502, MGC126503
    EC.number 1.6.1.2
    DNA
    TYPE functioning gene
    STRUCTURE 102.88 kb     22 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    MAPPING cloned Y linked N status provisional
    RNA
    TRANSCRIPTS type messenger
    text two transcripts encode the same protein
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    22 - 4689 - 1086 - 1997 9524818
    22 - 4655 - 1086 - 1997 9524818
    EXPRESSION
    Type widely
       expressed in (based on citations)
    organ(s)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Cardiovascularheart   moderately Homo sapiens
    Endocrineadrenal gland   highly Homo sapiens
     thyroid   moderately Homo sapiens
    Lymphoid/Immunelymph node   highly
    Urinarykidney   moderately Homo sapiens
    tissue
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Blood / hematopoieticbone marrow  highly
    Connectiveadipose    Homo sapiens
    cell lineage
    cell lines
    fluid/secretion
    at STAGE
    PROTEIN
    PHYSICAL PROPERTIES
    STRUCTURE
    motifs/domains
    HOMOLOGY
    interspecies ortholog to bovin,murine enzymes
    Homologene
    FAMILY
    CATEGORY enzyme
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,organelle,mitochondria,inner
    intracellular,cytoplasm,organelle,membrane
    text
  • integral protein of the inner mitochondrial membrane
  • basic FUNCTION
  • catalyzing the reduction of NADP(+) by NADH to NADPH and NAD(+)
  • nuclear-encoded mitochondrial protein involved in detoxification of ROS (reactive oxygen species)
  • play a role in mitochondrial oxidative phosphorylation (Scotto 2008)
  • inner mitochondrial membrane transmembrane protein involved in regenerating NADPH, coupled with proton translocation across the inner membrane
  • novel role for NNT as a regulator of macrophage-mediated inflammatory responses.
  • may have a role in ROS detoxification in human adrenal glands
  • mitochondrial enzyme that transfers reducing equivalents from NADH to NADPH
  • role of NNT in regulating central carbon metabolism via redox balance, calling for other mechanisms that coordinate substrate preference to maintain a functional tricarboxylic acid (TCA) cycle
  • NNT functions is a high-capacity source of mitochondrial NADPH and its functional loss due to the NNT mutation results in mitochondrial redox abnormalities, most notably a poor ability to sustain NADP and glutathione in their reduced states
  • is the critical link between the metabolic and H2O2 antioxidant function in brain mitochondria
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism energetic
    signaling
    a component
  • protein constituent of the inner mitochondrial membrane
  • INTERACTION
    DNA
    RNA
    small molecule
    protein
  • HERPUD1 regulates insulin secretion via control of NNTt expression
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s) FGCD4
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional germinal mutation      
    uncouple beta cell mitochondrial metabolism leading to less ATP production, enhanced KATP channel activity, and consequently impaired insulin secretion
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    SystemTypeDisorderPubmed
    neurologyneurodegenerative 
    potential therapeutic target to improve the redox balance in conditions of oxidative stress associated with neurodegenerative diseases
    ANIMAL & CELL MODELS
  • defect in Nnt function in the mouse, and specifically within the beta-cell, leads to a reduction in insulin secretion