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Symbol JUNB contributors: mct/shn - updated : 20-12-2015
HGNC name jun B proto-oncogene
HGNC id 6205
Location 19p13.2      Physical location : 12.902.309 - 12.904.124
Synonym name
  • activator protein 1
  • transcription factor jun-B
  • Synonym symbol(s) AP-1
    TYPE functioning gene
    STRUCTURE 1.82 kb     1 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    MAPPING cloned Y linked N status confirmed
    Map pter - D19S1165 - D19S221 - JUNB - D19S914 - D19S840 - cen
    Physical map
    ZNF442 19p13.13 zinc finger protein 442 LOC388510 19 LOC388510 LOC90576 19p13.2 hypothetical protein LOC90576 ZNF443 19p13.13 zinc finger protein 443 FLJ38281 19p13.2 hypothetical protein FLJ38281 MGC26914 19p13.2 hypothetical protein MGC26914 PGK1P2 6p21-p12 phosphoglycerate kinase 1, pseudogene 2 ZNF490 19p13.2 zinc finger protein 490 FLJ90396 19p13.2 hypothetical protein FLJ90396 MGC4238 19p13.2 hypothetical protein MGC4238 LOC284393 19p13.2 similar to 60S ribosomal protein L10 (QM protein homolog) MAN2B1 19p13.2-p13.1 mannosidase, alpha, class 2B, member 1 PTD008 19p13.2 PTD008 protein DHPS 19p13.12-p13.11 deoxyhypusine synthase MGC10870 19p13.2 hypothetical protein MGC10870 TNPO2 19p13.2 transportin 2 (importin 3, karyopherin beta 2b) MGC2803 19p13.2 hypothetical protein MGC2803 ASNA1 19q13.3 arsA arsenite transporter, ATP-binding, homolog 1 (bacterial) VMD2L1 19p13.2-p13.12 arsA arsenite transporter, ATP-binding, homolog 1 (bacterial) HOOK2 19p13.2 arsA arsenite transporter, ATP-binding, homolog 1 (bacterial) RNASEH2A 19p13.2 ribonuclease H2, large subunit JUNB 19p13.2 jun B proto-oncogene PRDX2 13q12 peroxiredoxin 2 RTBDN 19p12 retbindin DNASE2 19p13.2 deoxyribonuclease II, lysosomal KLF1 19p13.13-p13.12 Kruppel-like factor 1 (erythroid) GCDH 19p13.2 glutaryl-Coenzyme A dehydrogenase FARSLA 19p13.2 phenylalanine-tRNA synthetase-like, alpha subunit CALR 19p13.3-p13.2 calreticulin RAD23A 19p13.2 RAD23 homolog A (S. cerevisiae) PLINP-1 19p13.2 papillomavirus L2 interacting nuclear protein 1 FLJ38607 19p13.2 hypothetical protein FLJ38607 LOC339375 19p13.13 hypothetical LOC339375 NFIX 19p13.2 nuclear factor I/X (CCAAT-binding transcription factor) LYL1 19p13.2-p13.1 lymphoblastic leukemia derived sequence 1 FLJ20244 19p13.13 hypothetical protein FLJ20244 BTBD14B 19p13.13 BTB (POZ) domain containing 14B
    regionally located localized in the psoriasis susceptibility region PSORS6
    TRANSCRIPTS type messenger
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    1 - 1832 - 347 - 2008 18628455
    Type ubiquitous
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Digestiveliver   highly
    Nervousbrain   highly
     nervecranial nerve  highly
     spinal cord    
    Reproductivefemale systemuteruscervix highly
    Respiratorylung   highly
    Urinarykidney   highly
    SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
    Blood / Hematopoieticbone marrow   
    Connectiveadipose  highly
    cell lineage erythroid
    cell lines
    at STAGE
  • basic leucine zipper (bZIP) domain
  • conjugated ubiquitinated
    mono polymer heteromer , dimer
    interspecies ortholog to Junb, Mus musculus
    ortholog to Junb, Rattus norvegicus
    ortholog to JUNB, Pan troglodytes
  • AP-1 family
  • BZIP family
  • JUN subfamily
  • CATEGORY transcription factor , protooncogene
    SUBCELLULAR LOCALIZATION     intracellular
    basic FUNCTION
  • repressor of CCND1 promoter
  • regulator of erythroid differentiation
  • hypoxia-responsive transcription factor, absolutely required for VEGF regulation in a cell-type-independent manner
  • a key transcriptional regulator of myelopoiesis and a potential tumor suppressor gene
  • a positive regulator controlling primarily osteoblast as well as osteoclast activity
  • critical regulator of intrinsic mast cell functions including cross-talk with endothelial cells
  • essential upstream regulator of p16 and contributes to maintain cell senescence that blocks malignant transformation of transient amplifying cells
  • apparently plays an important role in controlling prostate carcinogenesis
  • critical regulator of T cell function and a transcriptional activator of various cytokine genes, such as IL2, IL4, and IL10
  • REL and JUNB cooperatively regulate FOXP3 expression by modulating the chromatin architecture of FOXP3 promoter region
  • GRN growth factor, JUNB, and MYOD1 transcription factor form a regulatory loop and act in concert in the course of myogenesis
  • a critical role in the epithelial-mesenchymal transition and profibrotic responses to TGF-beta
  • provides important input in setting the transcriptional program of the epithelial-mesenchymal transition and profibrotic responses to TGF-beta
  • CELLULAR PROCESS cell life, differentiation
    nucleotide, transcription
    a component
  • forming heterodimers with JUN, JUND, FOS, FOSB to form the transcription factor AP1 major target of mitogen-activated signal transduction pathway
  • REL and JUNB cooperatively enhance FOXP3 expression during induced regulatory T cell differentiation
  • BATF forms a heterodimeric complex with JUNB and JUN, induced upregulation of matrix-degrading enzymes and downregulation of cartilage matrix molecules in chondrocytes
    small molecule
  • conjugated with small ubiquitin-like modifier (SUMO) on lysine 237
  • protein
  • B-ATF
  • c-Jun NH2-terminal kinase, JNK
  • Nrf2 and Nrf1
  • Smad3 and Smad4
  • estrogen receptor alpha, ERalpha
  • BRCA1
  • BCL-6
  • c-Fos and LRF-1
  • c-Jun
  • NFATC2 and JUNB cooperatively regulate IL31 gene expression in CD4+ T cells in health and disease
  • BATF/JUNB and BATF/JUN complexes play important roles in osteoarthritic cartilage destruction through regulating anabolic and catabolic gene expression in chondrocytes
  • cell & other
    activated by erythropoietin induced
    hypoxia-induced NFKB
    induced by ligand induced
    light in the suprachiasmatic nucleus
    in response to hypoxia and required for VEGF expression
    Other phosphorylated and inactivated by CDC2, in mitotic and early G1 cells
    sumoylation of JUNB regulates its ability to induce cytokine gene transcription and likely plays a critical role in T cell activation
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral     --over  
    with JUN in Hodgkin lymphoma cells
    constitutional     --low  
    in epidermal keratinocytes of psoriatic lesions
    affects VEGF expression resulting in impaired neovascularization (in tumor)
    tumoral     --low  
    in patients with chronic myelogenous leukemia, due aberrant DNA methylation of its promoter, but downregulated in advanced phase CML through a mechanism independent from DNA methylation
    Variant & Polymorphism
    Candidate gene
    Therapy target
    for anti-angiogenic tumor therapies
    new target for cancer prevention and therapy
  • Transgenic mice specifically lacking JunB expression in the myeloid lineage develop a transplantable myeloproliferative disease eventually progressing to blast crisis and mice reconstituted with ES cell-derived junB-/- fetal liver cells also develop a myeloproliferative disease
  • JunBDelta/Delta mice are viable, but develop severe low turnover osteopenia caused by apparent cell-autonomous osteoblast and osteoclast defects before a chronic myeloid leukemia-like disease
  • mice with specific inactivation of Junb in the macrophage-osteoclast lineage develop an osteopetrosis-like phenotype with increased bone mass and reduced numbers of osteoclasts
  • inducible epidermal deletion of JunB and c-Jun in adult mice leads to a phenotype resembling the histological and molecular hallmarks of psoriasis, including arthritic lesions
  • Depletion of JunB by siRNA abrogates TGF-&
  • 946;-induced disruption of cell-cell junctions, formation of actin fibers, focal adhesions, and expression of fibrotic proteins