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Symbol KLF5 contributors: mct/pgu - updated : 03-03-2017
HGNC name Kruppel-like factor 5 (intestinal)
HGNC id 6349
Type widely
   expressed in (based on citations)
SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
Cardiovascularvessel   highly
Digestiveintestinelarge intestinecolon  
Reproductivemale systemprostate   
Respiratoryrespiratory tractlarynx  highly
SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
Epithelialabsorptive excretorydigestive epithelium (mucosa)  
SystemCellPubmedSpeciesStageRna symbol
not specificchondrocyte
cell lineage
cell lines
physiological period pregnancy
Text placenta
  • a N terminal helix-loop-helix (HLH)
  • a highly conserved 81 AA DNA binding domain
  • leucine zipper motifs
  • three C terminal C2H2-type zinc fingers
  • a PY motif in a transactivation domain necessary for interaction with WWP1
  • conjugated ubiquitinated
    interspecies ortholog to murine Klf5
  • Sp1-like family of GC box binding transcription factors
  • Krüppel family of C2H2-type zinc finger
  • CATEGORY transcription factor
    SUBCELLULAR LOCALIZATION     intracellular
    basic FUNCTION
  • transcriptional activator, promoting cell proliferation
  • involved in the cellular response to cardiovascular injury
  • plays a key part in the pathogenesis of cardiovascular diseases such as atherosclerosis and cardiac hypertrophy and fibrosis by mediating tissue remodeling in response to external stresses
  • implicated in carcinogenesis
  • playing a key role in mediating tissue remodeling
  • binding and transactivating the TCR-Dbeta 1 promoter
  • is important for induction of PDGF-alpha chain
  • is a key regulator of adipocyte differentiation
  • acts in concert with CEBPB/CEBPD to activate the PPARG promoter
  • having a growth-promoting role in intestinal epithelium
  • regulator of lipid metabolism and its SUMOylation within transcription factor complexes that also contain PPAR- serves as a molecular switch to repress or activate genes involved in lipid catabolism in response to PPAR- ligand and other signals
  • causes cartilage matrix degradation through transcriptional induction of MMP9, providing the first evidence that transcriptional regulation of a proteinase contributes to endochondral ossification and skeletal development
  • may be indispensable for skeletal development only in the perinatal period but be dispensable after birth under physiological and pathological conditions
  • plays a central role in cardiovascular pathologies through direct and specific stimulation of cell growth as well as inhibition of apoptosis
  • regulates both apoptosis in the early phase and proliferation in the late phase, thus indicating that this factor acts as a bimodal and likely central regulator of proliferative cardiovascular pathologies
  • mediates the signaling functions in cell proliferation, cell cycle, apoptosis, migration, differentiation, and stemness by regulating gene expression in response to environment stimuli
  • may promote breast cancer cell proliferation at least partially through directly activating the FGFBP1 mRNA transcription
  • not only essential for MYC transcription in proliferating epithelial cells but also mediates the inhibitory effect of TGFbeta on MYC transcription
  • mportant transcription factor regulating cell proliferation, cell cycle, survival, migration, differentiation, angiogenesis, and stem cell self-renewal
  • multifunctional transcription factor involved in cell proliferation, differentiation and carcinogenesis
  • required for formation and differentiation of the bladder urothelium
  • promoted cancer cell proliferation, migration and invasiveness in a manner dependent partly on TNFRSF11A expression
  • KLF5 and TNFRSF11A promote cervical cancer cell proliferation, migration and invasiveness
  • CDX1/CDX2, and KLF5 are key transcription factors involved in SHH pathway and cancer stem cells
  • CELLULAR PROCESS cell life, proliferation/growth
    nucleotide, transcription, regulation
    a component part of KLF5-FGFBP1-pERK-DUSP1 signaling axis, that may provide new therapeutic targets for invasive breast cancer
    DNA binding to epidermal growth factor response element, GC boxes and CAAT/GT boxes
    small molecule metal binding, cofactor, other,
  • zinc Zn2+
  • essential cofactor for TGFbeta signaling
  • basic transcription factor binding to GC boxes at a number of gene promoters and regulating their transcription
  • KLF5 activates NOS2 gene transcription and is involved in vascular inflammatory injury and remodeling)
  • protein
  • binding RAR
  • target of the E3 ubiquitin ligase WWP1 for proteolysis in epithelial cells
  • physically associating with PPARD
  • interact with EP300 through the region that is homologous to EKLFTAD2
  • binds directly to the 5' regulatory region of EGFR (regulates MEK/ERK signaling via EGFR and is also downstream of MAPK signaling, providing a novel mechanism for signal amplification or suppression and control of proliferation in basal cells)
  • directly bound to the promoter and up-regulated gene expression of CCND1, as well as showing specific transactivation of cyclins and cyclin-dependent kinase inhibitors in cardiovascular cells
  • interacts with the novel histone chaperone acidic nuclear phosphoprotein 32B (ANP32B), leading to transcriptional repression of a KLF5-downstream gene
  • FBXW7 inhibits breast cell proliferation at least partially through targeting KLF5 for proteolysis
  • WWP1 E3 ligase targets KLF5 for ubiquitin-mediated degradation
  • essential co-factor for the TGFbeta (transforming growth factor B) tumour suppressor
  • transactivates NOTCH1 in the context of TP53 mutation or loss
  • SMURF2, an E3 ubiquitin ligase, is an interacting protein of KLF5
  • interacting with WWTR1 (promotes breast cell growth partially through protecting KLF5 from WWP1-mediated degradation and enhancing KLF5 activities)
  • role of KLF5 (Krüppel-like factor 5) in androgen-regulated DHCR24 expression
  • CDX1-induced SALL4 and KLF5 converted gastric epithelial cells into tissue stem-like progenitor cells, which then transdifferentiated into intestinal epithelial cell
  • TNFRSF11A is a direct binding target of KLF5, in tumour cell proliferation and invasiveness
  • BAP1 antagonized WWP1-mediated ubiquitination of KLF5 to inhibit autophagy and promote melanoma development
  • cell & other
    induced by angiotensin 2
    inhibited by rapidly degraded through the proteasome after ubiquitination by E3 ubiquitin ligases, such as WWP1 and FBXW7
    oestrogen that causes the degradation of KLF5 protein by inducing the expression of TRIM25 in ER-positive breast cancer cells
    repressed by HDAC1 through direct interaction
    Other controlled directly by its protein
    tightly regulated by the ubiquitin-proteasome pathway
    SUMOylation of KLF5 functions as a molecular switch for fatty acid oxidation programs involving PPAR- and various co-regulators
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral   deletion    
    frequent hemizygous deletion or loss of expression in breast cancer
    tumoral     --low  
    an LOH and loss of function in prostate cancer
    tumoral     --low  
    in intestinal tumors
    silenced by hypermethylation in acute myeloid leukemia
    tumoral     --low  
    was lost concurrently with NOTCH1 in squamous cell cancers
    Variant & Polymorphism
    Candidate gene may be a tumor suppressor gene in prostate cancer
    Therapy target
    FBXW7 tumor suppressor targeting KLF5 for ubiquitin-mediated degradation and suppression of breast cell proliferation, is a therapeutic target for breast cancer and other cancers
    potential diagnostic biomarker and therapeutic target for cardiovascular diseases
    KLF5 may be a useful diagnostic and therapeutic target in esophageal squamous carcinomas and possibly more generally in other cancers associated with TP53 loss of function
  • Klf5 knockout mice, homozygous mutant died before embryonic day 8.5
  • Klf5 +/- mice showed diminished levels of arterial wall thickening angiogenesis, cardiac hypertrophy and intestinal fibrosis in response to external stress
  • Klf5 null mice were markedly deficient in white adipose tissue development