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Symbol TP63 contributors: mct/pgu - updated : 06-03-2015
HGNC name tumor protein p63
HGNC id 15979
Corresponding disease
ADULT acro-dermato-ungual-lacrimal-tooth syndrome
AEC ankyloblepharon-ectodermal dysplasia-clefting syndrome
EEC3 ectrodactyly, ectodermal dysplasia, and cleft lip/palate 3
LMS limb mammary syndrome
RHS Rapp- Hodgkin syndrome
SHFM4 split hand foot malformation 4
Location 3q28      Physical location : 189.349.215 - 189.615.068
Synonym name
  • tumor protein 63KDa with strong homology to p53
  • DN p63 alpha
  • DN p63 beta
  • TA p63 beta
  • tumor protein p73-like
  • tumor protein p53-like
  • tumor protein p53-competing protein
  • amplified in squamous cell carcinoma
  • chronic ulcerative stomatitis protein
  • keratinocyte transcription factor KET
  • Synonym symbol(s) KET, TAP63, P73H, P51, P73L, TP73L, P40, P63, OFC8, B(p51A), B(p51B), TP53L, TP53CP, AIS, NBP, p53CP
    TYPE functioning gene
    STRUCTURE 265.85 kb     14 Exon(s)
    regulatory sequence Binding site
    text structure DNA binding sites
    MAPPING cloned Y linked N status confirmed
    Map cen - CLCN2 - SST - D3S1580 - D3S3549 - D3S3530 - TP63 - D3S1294 - D3S1314 - D3S2747 - APOD - GAP43 - qter
    TRANSCRIPTS type messenger
    text two additional transcripts called delta-N-p63-delta and delta-N-p63-epsilon, that increase from 6 to 10 the number of the p63 isoforms (due to the 2 alternative promoters P1 and P2 and five variants) (PMID: 19700772)
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    14 - 4927 - 680 - 2009 19898465
  • also called TAp63alpha, KET and p51B
  • exons 2-14 with the transactivation domain
  • has little transactivation activity (PMID: 21075072)
  • 13 - 4833 - 555 - 2009 19898465
  • also called TAp63beta (transcriptionally active (TA))
  • exons 2-12, 14, TA+, lacking the SAM domain
  • 11 - 2870 - 487 - 2009 19898465
  • also called TAp63gamma
  • exons 2-10, 15, TA+ lacking the SAM domain
  • transactivates target genes in a manner similar to that of TP53 (PMID: 21075072)
  • 12 - 4697 - 586 - 2009 19898465
  • also called deltaNp63alpha, CUSP and p73H
  • exons 3, 4-14
  • crucial for modulation of KRT14 transcription
  • plays a master role in epidermal development (PMID: 20888799)
  • the SAM domain appears, at least in part, to be involved in the inhibition of POU2F3
  • represses the transactivation activity of TP53 or TAp63gamma, but deltaNp63gamma can only repress the transactivation activity of TP53
  • lacking the N-terminal domain, and having a critical role in the maintenance of self renewal and progenitor capacity in several types of epithelial tissues
  • activation of the CTNNB1 pathway may contribute to overexpression of deltaNp63 during tumour progression, in a cell type-specific manner
  • 11 - 4603 - 461 - 2009 19898465
  • also called deltaNp63beta
  • exons 3', 4-12, 14, TA- lacking the SAM domain
  • lacking the N-terminal domain, and having a critical role in the maintenance of self renewal and progenitor capacity in several types of epithelial tissues
  • activation of the CTNNB1 pathway may contribute to overexpression of deltaNp63 during tumour progression, in a cell type-specific manner
  • 9 - 2640 - 393 - 2009 19898465
  • also called deltaNp63gamma
  • exons 3', 4-10, 15, TA- lacking the SAM domain
  • lacking the N-terminal domain, and having a critical role in the maintenance of self renewal and progenitor capacity in several types of epithelial tissues
  • activation of the CTNNB1 pathway may contribute to overexpression of deltaNp63 during tumour progression, in a cell type-specific manner
    Type widely
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Cardiovascularheart   highly
    Digestiveesophagus   moderately
     mouth   predominantly
     pharynx   highly
    Reproductivemale systemmale genital tract  moderately Homo sapiensFetal
    Respiratoryrespiratory tractlarynx  highly
    Skin/Tegumentskin   moderately Homo sapiensFetal
    Urinarybladder   highly Homo sapiensFetal
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Epithelialbarrier lininguroepithelium   Homo sapiensFetal
    cell lineage highly in the basal or progenitor layers of many epithelial tissues
    cell lines constitutively expressed in female germ cells during meiotic arrest
    at STAGE
  • one transactivation domain
  • a DNA binding region, including four subdomains (II-V), the p63DBD
  • at the C terminus a domain known to interact with other proteins, the sterile alpha motif (SAM), followed by a transcription inhibitory domain (TID)
  • mono polymer homomer , tetramer
    interspecies homolog to murine Trp63 (98.4pc)
    homolog to rattus Trp63 (97.8pc)
    intraspecies homolog to TP53
  • p53 family
  • CATEGORY transcription factor
    SUBCELLULAR LOCALIZATION     intracellular
    basic FUNCTION
  • playing a critical role in the maintenance of the progenitor-cell populations necessary to sustain ectodermal differentiation (median apical ectodermal ridge, AER) development and morphogenesis, essential for regenerative proliferation in limb, craniofacial and epithelial development
  • involved in Notch signaling by probably inducing JAG1 and JAG2
  • playing a role in the regulation of epithelial morphogenesis
  • required for limb formation from the apical ectodermal ridge
  • may play a critical role in the progression of urothelial neoplasia
  • inhibit keratinocyte terminal differentiation during early development and play important roles in maintaining the epidermal stem cell population
  • acts upstream of DLX3 homeobox gene in a transcriptional regulatory pathway relevant to ectodermal dysplasia
  • essential for Ras-induced senescence
  • function as tumour suppressors by regulating senescence through TP53-independent pathways
  • is essential in a process of DNA damage-induced oocyte death not involving TP53
  • multi-isoform TP53 family member essential for epidermal development
  • binds to and transactivates the DICER1 promoter, demonstrating direct transcriptional regulation of DICER1 by TAP63
  • critical regulator of cancer metastasis
  • involved in promoting the repair of doxorubicin-induced DNA damage through arresting the cells at G0/G1
  • inducible in TP53-deficient cells by treatment with DNA-damaging agents and is involved in growth arrest, cell cycle regulation, and DNA damage repair
  • TP63 and SFN play opposing roles in the development of skin tumors and the accumulation of TP63 is essential for Ras/SFN mutation-induced papilloma formation and squamous cell carcinoma carcinogenesis
  • master regulator of epidermal morphogenesis, executing its function in part by directly regulating expression of the genome organizer SATB1 in progenitor cells
  • TP63 acts via transcriptional induction of the BH3-only proteins, BBC3 and PMAIP1 to cause apoptosis of DNA-damaged primordial follicle oocytes
  • TP63 is a crucial regulator of a subset of desmosomal genes
  • involved in bladder exstrophy epispadias complex (BEEC)
  • pathogenesis
    CELLULAR PROCESS cell life, cell death/apoptosis
    nucleotide, transcription, regulation
    nucleotide, RNA splicing
    text transcriptional coactivator
    signaling sensory transduction/vision
    a component
    DNA binding DNA as a homotetramer
    small molecule metal binding,
  • binding ion Zn2+
  • protein
  • FMR1 (RNA target of FMR1)
  • interacting with AIRE (involvement of AIRE and TP63 in the regulation of HLA class II)
  • interacting with SHISA5 (TP63 target gene induced during epithelial differentiation, a complex process that also involves ER stress induction)
  • interacting with CCL17 (TP63 induces CD4+ T-cell chemoattractant CCL17 in human epithelial cells)
  • interacting with CDH3
  • directly associated with the DLX5 and DLX6 promoters
  • MIR130B is a direct target of TP63
  • antagonistic roles of POU2F3 and deltaNp63, probably through competition for overlapping binding sites or through an indirect interaction
  • phosphorylated TP63 induces transcription of ADRM1, leading to NOS2 protein degradation
  • binding specific cis-acting sequence within the ID2 gene promoter, not suppressing ID2 expression, but rather preventing excessive expression of that protein to enable the onset of keratinocyte differentiation
  • ZNF750 is a direct target of TP63
  • TP63 but not TP53 is essential for DNA damage triggered transcriptional induction of BBC3 and PMAIP1 in primordial follicle oocytes
  • RNF144B is a potentially critical component of epithelial homeostasis, acting downstream of TP63 to regulate cellular levels of CDKN1A and TP63
  • FANCD2 activates transcription of TP63 and suppresses tumorigenesis
  • RBM24 is a novel regulator of TP63 via mRNA stability (TP63 is regulated by RBM24 via mRNA stability)
  • MTSS1/TP63 axis might be functionally important to regulate breast tumor progression
  • like CLCA2, MPZL2 is a type I transmembrane protein that is regulated by TP53 and TP63
  • cell & other
    induced by induced in association with the upregulation and a secretion of growth differentiation factor 15 (GDF15) during the keratinocyte differentiation
    Other its phosphorylation is induced by DNA damage
    phosphorylated by PLK1, resulting in a decrease of stability and suppression of TP63-induced cell death in liver tumor cells
    regulated via mRNA stability and a novel regulatory feedback loop between RBM38 and TP63
    corresponding disease(s) AEC , LMS , SHFM4 , ADULT , RHS , EEC3
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional germinal mutation     gain of function
    mutation gain of function in ADULT syndrome
    tumoral       loss of function
    in squamous cell carcinoma
    tumoral somatic mutation      
    in B cell lymphoma
    constitutional germinal mutation      
    in Hay-Wells syndrome
    constitutional     --other  
    dysregulated in psoriasis
    tumoral     --low  
    in cancer showed an increased invasive ability
    tumoral     --over  
    in 80 p100 of head and neck squamous cell carcinomas (HNSCC)
    tumoral     --over  
    in two TP53-deficient human cancer cell lines, leading to cell cycle arrest and attenuating doxorubicin-induced DNA damage
    tumoral     --low  
    in TP53-expressing cancer cells, possibly due to their similar biological functions
    tumoral fusion      
    fusion between TBL1XR1 and TP63,in diffuse large B-cell lymphoma (DLBCL)
    tumoral   amplification    
    in early stage of esophageal squamous cell carcinoma (EC-SCC) carcinogenesis but down-regulated in advanced stage of disease
  • to urinary bladder cancer
  • to nonsyndromic cleft palate and nonsyndromic cleft lip and palate
  • to bladder exstrophy epispadias complex
  • Variant & Polymorphism insertion/deletion , other
  • increasing the risk of urinary bladder cancer
  • a SAM domain mutation (p.Asp564His) in TP63 that predisposed the patients to have nonsyndromic cleft palate and nonsyndromic cleft lip and palate
  • Insertion/deletion polymorphisms in the deltaNp63 promoter are a risk factor for bladder exstrophy epispadias complex
  • Candidate gene
    Therapy target
    potential target of anti-cancer therapy for human malignancies with compromised TP53
  • p63-null mice revealed a complex relationship between the gene and development, with severe deleterious effects
  • mice lacking p63 exhibit skin and craniofacial defects including cleft palate