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Symbol POR contributors: mct - updated : 06-06-2012
HGNC name P450 (cytochrome) oxidoreductase
HGNC id 9208
Corresponding disease
ANBXL2 Antley-Bixler syndrome 2
DSTG disordered steroidogenesis, isolated
PORD POR deficiency
Location 7q11.23      Physical location : 75.544.419 - 75.616.172
Synonym name NADPH--cytochrome P450 reductase
Synonym symbol(s) NCPR, CYPOR, CPR, P450R, FLJ26468, DKFZp686G04235
TYPE functioning gene
STRUCTURE 71.75 kb     16 Exon(s)
10 Kb 5' upstream gene genomic sequence study
regulatory sequence Binding site   transcription factor
text structure
  • no TATA, no CAAT boxes, house keeping gene
  • Sp1
  • MAPPING cloned Y linked N status confirmed
    Physical map
    GTF2IRD2 7q11.23 transcription factor GTF2IRD2 LOC389522 7 similar to Cohesin subunit SA-3 (Stromal antigen 3) (SCC3 homolog 3) PMS2L5 7q11-q22 postmeiotic segregation increased 2-like 5 LOC389523 7 similar to opposite strand transcription unit to Stag3; Gats protein WBSCR16 7q11.23 Williams-Beuren syndrome chromosome region 16 LOC389524 7 similar to transcription factor GTF2IRD2 NCF1 7q11.23 neutrophil cytosolic factor 1 (47kDa, chronic granulomatous disease, autosomal 1) LOC392058 7 similar to opposite strand transcription unit to Stag3; Gats protein PMS2L2 7q11-q22 postmeiotic segregation increased 2-like 2 LOC222190 7q11.23 hypothetical gene supported by AK024602 DKFZP434A0131 7q11.23-q21.1 DKFZp434A0131 protein TRIM50B 7q11.23 tripartite motif-containing 50B WBSCR20B 7q11.23 tripartite motif-containing 50B LOC340318 7q11.23 hypothetical protein LOC340318 PMS2L9 7q11.23 postmeiotic segregation increased 2-like 9 HIP1 7q11.23 huntingtin interacting protein 1 CCL26 7q11.23 chemokine (C-C motif) ligand 26 CCL24 7q11.23 chemokine (C-C motif) ligand 24 LOC392059 7 similar to ALY NPD007 7q11.23 NPD007 protein POR 7q11.2 P450 (cytochrome) oxidoreductase TMPIT 7q11.23 transmembrane protein induced by tumor necrosis factor alpha MK-STYX 7q11.23 map kinase phosphatase-like protein MK-STYX MDH2 7cen-q22 malate dehydrogenase 2, NAD (mitochondrial) LOC389525 7 similar to hypothetical protein LOC285908 LOC392060 7 similar to GrpE protein homolog 1, mitochondrial precursor (Mt-GrpE#1) (HMGE) LOC392061 7 similar to GTF2I repeat domain containing 1 isoform 2; Williams-Beuren syndrome chromosome region 11; GTF2I repeat domain-containing 1; general transcription factor 3; muscle TFII-I repeat domain-containing protein 1 alpha 1 FLJ37078 7q11.23 hypothetical protein FLJ37078 HSPB1 7q11.23 heat shock 27kDa protein 1 YWHAG 7q11.23 tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, gamma polypeptide LOC392062 7 similar to peptidylprolyl isomerase A SRCRB4D 7p12.3 scavenger receptor cysteine rich domain containing, group B (4 domains) ZP3 7q11.23 zona pellucida glycoprotein 3 (sperm receptor) DTX2 7p12.3 deltex homolog 2 (Drosophila) UPK3B 7q11.2 uroplakin 3B POMZP3 7q11.23 POM (POM121 homolog, rat) and ZP3 fusion LOC392063 7 similar to Farnesyl pyrophosphate synthetase (FPP synthetase) (FPS) (Farnesyl diphosphate synthetase) LOC370523 7q11.23 similar to deltex 2 LOC389526 7 hypothetical gene supported by AK024602 LOC389527 7 similar to PMS4 homolog mismatch repair protein - human LOC202802 7q11.23 similar to Williams Beuren syndrome chromosome region 19 FGL2 7q11.2 fibrinogen-like 2 LOC54103 7q21.11 hypothetical protein LOC54103 LOC392064 7 similar to hypothetical protein
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    16 - 2509 - 680 - 2005 16125667
    Type ubiquitous
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Digestivemouthtongue  highly
    Endocrineadrenal gland   highly
    Reproductivefemale systemovary  highly
    cell lineage
    cell lines
    at STAGE
  • a flavodoxin-like domain
  • a FAD-binding domain
  • conjugated FlavoP
    interspecies homolog to murine Por
  • P450 heme-binding monooxygenase superfamily
  • FAD-FMN family of proteins
  • CATEGORY enzyme , transport
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,cytoplasm,organelle,endoplasmic reticulum
    basic FUNCTION
  • required for electron transfer from NADP to cytochrome p450 in microsomes
  • can also provide electron transfer to heme oxygenase and cytochrome B5
  • electron donor for all microsomal P450 enzymes including CYP26A1 involved in inactivation of all-trans retinoic acid
  • flavoprotein that acts as the obligatory electron donor to all microsomal P450 enzymes, including those involved in hepatic drug metabolism as well as three steroidogenic P450 enzymes
  • microsomal electron-transferring enzyme, which provides the reducing equivalents to various redox partners, such as cytochromes P450 (CYPs), heme oxygenase (HO), cytochrome b(5) and squalene monooxygenase
  • involved in regulation of gap junction function and GJA1 may play an important role in POR-mediated bone defects seen in patients
  • plays a role in transcriptional regulation of GJA1 in osteoblasts and, as a consequence could be an important player in POR-mediated bone development
    PHYSIOLOGICAL PROCESS electron transport
    metabolism drug , lipid/lipoprotein
    a component
    small molecule cofactor, nucleotide,
  • FAD electron acceptor rom NADPH
  • FMN electron donor to acdeptors such as the cytochrome as well as enzymes involved in sterol,fatty acid metabolism and degradation of heme
  • protein
  • PGRMC1 binds to POR, which may influence CYP2B6 activity
  • can regulate GJA1 expression at the transcription level and decreases in POR reduce gap junctional intercellular communication, as well as hemichannel activity
  • cell & other
    induced by pituitary-thyroid axis,thyroid hormone T3
    corresponding disease(s) ANBXL2 , DSTG , PORD
    Variant & Polymorphism
    Candidate gene
    Therapy target