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MYC

Identity

Other namesC-MYC
identified as the oncogene of the MC29 avian myelocytomatosis virus
Hugo MYC
Location 8q24
 
  c-MYC (8q24) in normal cells: PAC 944B18 (top) and PAC 968N11 (below) - Courtesy Mariano Rocchi, Resources for Molecular Cytogenetics. Laboratories willing to validate the probes are wellcome: contact M Rocchi

DNA/RNA

Transcription alternative splicing; coding sequences: 1318 and 1362 bp for proteins p64 and p67 respectively

Protein

Description 439 amino acids and 48 kDa in the p64; 454 amino acids in the p67 (15 additional amino acids in N-term; contains from N-term to C-term: a transactivation domain,an acidic domain, a nuclear localization signal, a basic domain, an helix-loop-helix motif, and a leucin zipper; DNA binding protein
Expression expressed in almost all proliferating cells in embryonic and adult tissues; in adult tissues, expression correlates with cell proliferation; abnormally high expression is found in a wide variety of human and rodent tumours
Localisation located predominantly in the nucleus
Function
  • The encoded myc oncoproteins are apparently transcription factors known as basic region-helixloop-helix-leucine zipper (b-HLH-Zip) proteins; like other b-HLH-Zip proteins, they modulate the expression of target genes by binding to specific DNA sequences
  • In this case, however, the binding requires dimerization to another b-HLH-Zip protein, namely Max (the latter can also form heterodimers with Mad as well as homodimers with itself). Myc/Max complexes activate transcription and promote cell proliferation and transformation. Mad/Max complexes, however, repress transcription and block myc-mediated cell transformation. All three complexes bind to the same DNA sequence and are competitors.
  • Expression of c-myc is required for proliferation; it can over-ride p53-induced Gl-arrest by inducing an inhibitor of the cyclin kinase inhibitor WAFI(p2l). The latter (located at 6p2l) normally coordinates S and M phases of the cell cycle. If absent, cells with damaged DNA arrest not in GI but in a G2-like state from which they can pass through additional S phases without intervening normal mitoses (the deformed polyploid cells that result may then die by apoptosis). The uncoupling of S and M may contribute to the acquisition of the chromosomal abnormalities manifested by most tumour cells when apoptotic pathways have been circumvented
  • Homology the human myc family also includes N-myc and L-myc, rather specifically implicated in neuroblastoma and small-cell lung carcinoma, respectively, in which amplified copy numbers have been found

    Implicated in

    Entity Burkitt's lymphoma
    Hybrid/Mutated Gene the gene is activated by translocation next to an immunoglobulin constant gene. Most frequently, it is positioned near the immunoglobulin heavy-chain (IgH) constant region on chromosome 14 but, in some tumours, near the light-chain region chromosome 2 (IgK) or 22 (IgL). It is now known that immunoglobulin joining enzymes may be involved in recombinations associated with a variety of chromosomal translocations in B and T cells
      
    Entity amplification has been described in many types of tumour, including breast, cervical and colon cancers, as well as in squamous cell carcinomas of the head and neck, myeloma, non-Hodgkin's lymphoma, gastric adenocarcinomas and ovarian cancer
    Prognosis C-myc involvement is by no means universally found in these cancers; there may be a correlation with the more advanced stages, suggesting a value as a prognostic indicator (although this has not been demonstrated in some studies for breast, ovarian and cervical cancers)
    Oncogenesis C-myc gene activation (enhanced expression and/or amplification) may result from chromosomal duplication as well as translocation, and from retroviral as well as point mutation. Multiple copies of the gene may be evidenced in homogeneously staining chromosomal regions and in double minutes
      
    Entity Role of c-myc in other conditions
    Disease In adult respiratory distress syndrome the degree of diffuse alveolar damage and consequently the prognosis may be related to the intensity of expression of c-myc in the alveolar cells which, if severe, may contribute to deregulation of cellular proliferation and apoptosis. In endometriosis, c-myc expression is a possibly important regulator of cellular proliferation.
      

    Breakpoints

     

    To be noted

    Although c-myc appears to be active in variety of tumours, it is important to realise that in common with other mechanistic pathways to cancer induction and progression no single genetic event (including c-myc deregulation) will prove to be necessary in the light of the inherent complexity and diversity of cellular pathways leading to neoplasia

    External links

    Nomenclature
    HugoMYC
    GDBMYC
    Entrez_GeneMYC  4609  v-myc myelocytomatosis viral oncogene homolog (avian)
    Cards
    AtlasMYCID27
    GeneCardsMYC
    EnsemblMYC [Search_View]   ENSG00000136997 [Gene_View]
    GenatlasMYC
    GeneLynxMYC
    eGenomeMYC
    euGene4609
    Genomic and cartography
    GoldenPathMYC  -  8q24   chr8:128817498-128822853 +  8q24.21   [Description]    (hg18-Mar_2006)
    EnsemblMYC - 8q24.21 [CytoView]
    NCBIMapview
    OMIMDisease map [OMIM]
    HomoloGeneMYC
    Gene and transcription
    GenbankBC000141 [ ENTREZ ]
    GenbankBC000917 [ ENTREZ ]
    GenbankBC058901 [ ENTREZ ]
    GenbankBT019768 [ ENTREZ ]
    GenbankCR609560 [ ENTREZ ]
    RefSeqNM_002467 [ SRS ]    NM_002467 [ ENTREZ ]
    RefSeqAC_000051 [ SRS ]    AC_000051 [ ENTREZ ]
    RefSeqNC_000008 [ SRS ]    NC_000008 [ ENTREZ ]
    RefSeqNG_007161 [ SRS ]    NG_007161 [ ENTREZ ]
    RefSeqNT_008046 [ SRS ]    NT_008046 [ ENTREZ ]
    RefSeqNW_923984 [ SRS ]    NW_923984 [ ENTREZ ]
    AceViewMYC AceView - NCBI
    UnigeneHs.202453 [ SRS ]    Hs.202453 [ NCBI ]     HS202453 [ spliceNest ]
    Fast-db8586 (alternative variants)
    Protein : pattern, domain, 3D structure
    SwissProtP01106 [ SRS]    P01106 [ EXPASY ]     P01106 [ INTERPRO ]
    PrositePS50888 HLH [ SRS ]    PS50888 HLH [ Expasy ]
    InterproIPR001092 HLH_basic [ SRS ]    IPR001092 HLH_basic [ EBI ]
    InterproIPR011598 HLH_DNA_bd [ SRS ]    IPR011598 HLH_DNA_bd [ EBI ]
    InterproIPR003327 Myc-LZ [ SRS ]    IPR003327 Myc-LZ [ EBI ]
    InterproIPR002418 TF_Myc [ SRS ]    IPR002418 TF_Myc [ EBI ]
    InterproIPR012682 TF_Myc_N [ SRS ]    IPR012682 TF_Myc_N [ EBI ]
    CluSTrP01106
    PfamPF00010 HLH [ SRS ]    PF00010 HLH [ Sanger ]    pfam00010 [ NCBI-CDD ]
    PfamPF02344 Myc-LZ [ SRS ]    PF02344 Myc-LZ [ Sanger ]    pfam02344 [ NCBI-CDD ]
    PfamPF01056 Myc_N [ SRS ]    PF01056 Myc_N [ Sanger ]    pfam01056 [ NCBI-CDD ]
    SmartSM00353 HLH [EMBL]
    BlocksP01106
    PDB1A93 [ SRS ]    1A93 [ PdbSum ],   1A93 [ IMB ]   1A93 [ RSDB ]
    PDB1EE4 [ SRS ]    1EE4 [ PdbSum ],   1EE4 [ IMB ]   1EE4 [ RSDB ]
    PDB1MV0 [ SRS ]    1MV0 [ PdbSum ],   1MV0 [ IMB ]   1MV0 [ RSDB ]
    PDB1NKP [ SRS ]    1NKP [ PdbSum ],   1NKP [ IMB ]   1NKP [ RSDB ]
    PDB2A93 [ SRS ]    2A93 [ PdbSum ],   2A93 [ IMB ]   2A93 [ RSDB ]
    HPRD01818
    Protein Interaction databases
    DIPP01106
    IntActP01106
    Polymorphism : SNP, mutations, diseases
    OMIM113970;190080    [ map ]   
    GENECLINICS113970;190080
    SNPMYC [dbSNP-NCBI]  
    SNPNM_002467 [SNP-NCI]  
    SNPMYC [GeneSNPs - Utah]  MYC] [HGBASE - SRS]
    HAPMAPMYC [HAPMAP]  
    COSMICMYC [Somatic mutation (COSMIC-CGP-Sanger)]  
    TICdbMYC [Translocation breakpoints In Cancer]  
    HGMDMYC
    General knowledge
    Family BrowserMYC [UCSC Family Browser]
    SOURCENM_002467
    SMDHs.202453
    SAGEHs.202453
    GODNA binding [Amigo]  DNA binding
    GOtranscription factor activity [Amigo]  transcription factor activity
    GOtranscription factor activity [Amigo]  transcription factor activity
    GOprotein binding [Amigo]  protein binding
    GOnucleus [Amigo]  nucleus
    GOnucleus [Amigo]  nucleus
    GOnucleus [Amigo]  nucleus
    GOregulation of transcription, DNA-dependent [Amigo]  regulation of transcription, DNA-dependent
    GOregulation of transcription, DNA-dependent [Amigo]  regulation of transcription, DNA-dependent
    GOregulation of transcription from RNA polymerase II promoter [Amigo]  regulation of transcription from RNA polymerase II promoter
    GOcellular iron ion homeostasis [Amigo]  cellular iron ion homeostasis
    GOcell cycle arrest [Amigo]  cell cycle arrest
    GOcell proliferation [Amigo]  cell proliferation
    GOpositive regulation of cell proliferation [Amigo]  positive regulation of cell proliferation
    BIOCARTATumor Suppressor Arf Inhibits Ribosomal Biogenesis    [Genes]
    BIOCARTARole of EGF Receptor Transactivation by GPCRs in Cardiac Hypertrophy    [Genes]
    BIOCARTACadmium induces DNA synthesis and proliferation in macrophages    [Genes]
    BIOCARTACTCF: First Multivalent Nuclear Factor    [Genes]
    BIOCARTAErk1/Erk2 Mapk Signaling pathway    [Genes]
    BIOCARTAInhibition of Cellular Proliferation by Gleevec    [Genes]
    BIOCARTAIL-2 Receptor Beta Chain in T cell Activation    [Genes]
    BIOCARTAMAPKinase Signaling Pathway    [Genes]
    BIOCARTAp38 MAPK Signaling Pathway    [Genes]
    BIOCARTAMechanism of Gene Regulation by Peroxisome Proliferators via PPARa(alpha)    [Genes]
    BIOCARTATelomeres, Telomerase, Cellular Aging, and Immortality    [Genes]
    BIOCARTAOverview of telomerase protein component gene hTert Transcriptional Regulation    [Genes]
    BIOCARTANeuropeptides VIP and PACAP inhibit the apoptosis of activated T cells    [Genes]
    BIOCARTAWNT Signaling Pathway    [Genes]
    KEGGMAPK signaling pathway
    KEGGWnt signaling pathway
    KEGGTGF-beta signaling pathway
    KEGGJak-STAT signaling pathway
    KEGGColorectal cancer
    PubGeneMYC
    TreeFamMYC
    CTD4609 [Comparative ToxicoGenomics Database]
    Other databases
    Probes
    Probec-MYC (8q24) in normal cells (Bari)
    ProbeMYC Related clones (RZPD - Berlin)
    PubMed
    PubMed356 Pubmed reference(s) in LocusLink

    Bibliography

    c-myc and immunoglobulin kappa light chain constant genes are on the 8q+ chromosome of three Burkitt lymphoma lines with t(2;8) translocations.
    Rappold GA, Hameister H, Cremer T, Adolph S, Henglein B, Freese UK, Lenoire GM, Bornkamm GW
    The EMBO journal. 1984 ; 3 (12) : 2951-2955.
    PMID 6441706
     
    Amplification of the c-myc oncogene in a subpopulation of human small cell lung cancer.
    Saksela K, Bergh J, Lehto VP, Nilsson K, Alitalo K
    Cancer research. 1985 ; 45 (4) : 1823-1827.
    PMID 2983887
     
    Myc family genes: a dispersed multi-gene family.
    Depinho RA, Hatton K, Ferrier P, Zimmerman K, Legouy E, Tesfaye A, Collum R, Yancopoulos G, Nisen P, Alt F
    Annals of clinical research. 1986 ; 18 (5-6) : 284-289.
    PMID 3551773
     
    c-myc protooncogene polypeptide expression in endometriosis.
    Schenken RS, Johnson JV, Riehl RM
    American journal of obstetrics and gynecology. 1991 ; 164 (4) : 1031-1036.
    PMID 1707594
     
    The c-myc oncogene in tumor progression.
    Garte SJ
    Critical reviews in oncogenesis. 1993 ; 4 (4) : 435-449.
    PMID 8353142
     
    Chromosomal translocations deregulating c-myc are associated with normal immune responses.
    Roschke V, Kopantzev E, Dertzbaugh M, Rudikoff S
    Oncogene. 1997 ; 14 (25) : 3011-3016.
    PMID 9223664
     
    Repression by the Mad(Mxi1)-Sin3 complex.
    Schreiber-Agus N, DePinho RA
    BioEssays : news and reviews in molecular, cellular and developmental biology. 1998 ; 20 (10) : 808-818.
    PMID 9819568
     
    Amplification of the c-myc oncogene in non-small cell lung cancer.
    Ozkara HA, Ozkara S, Topˆßu S, Criss WE
    Tumori. 1999 ; 85 (6) : 508-511.
    PMID 10774575
     
    MYC oncogenes and human neoplastic disease.
    Nesbit CE, Tersak JM, Prochownik EV
    Oncogene. 1999 ; 18 (19) : 3004-3016.
    PMID 10378696
     
    Proliferation, C-myc, and cyclin D1 expression in diffuse alveolar damage: potential roles in pathogenesis and implications for prognosis.
    Adamson A, Perkins S, Brambilla E, Tripp S, Holden J, Travis W, Guinee D Jr
    Human pathology. 1999 ; 30 (9) : 1050-1057.
    PMID 10492039
     
    REVIEW articlesautomatic search in PubMed
    Last year publicationsautomatic search in PubMed

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    Contributor(s)

    Written08-2000Niels B Atkin

    Citation

    This paper should be referenced as such :
    Atkin NB . MYC. Atlas Genet Cytogenet Oncol Haematol. August 2000 .
    URL : http://AtlasGeneticsOncology.org/Genes/MYCID27.html

    © Atlas of Genetics and Cytogenetics in Oncology and Haematology
    indexed on : Wed Jul 2 08:25:17 2008


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