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KLF5 : Kruppel-like factor 5 (intestinal)

Identity

Other namesIKLF
BTEB2
HGNC (Hugo) KLF5
LocusID (NCBI) 688
Location 13q22.1
Location_base_pair Starts at 73629114 and ends at 73651680 bp from pter ( according to hg19-Feb_2009)  [Mapping]
 
Note FISH study in PC-3 prostate cancer cell line using BAC 505F3 as a probe

DNA/RNA

 
  Black box: Exon
Description KLF5 gene encompasses 4 exons which span about 18.7 kb of DNA. BAC clone RPCI-505F3 contains the complete KLF5 genome sequence.
Transcription about 3.4 Kb mRNA, 1374 bp open reading frame

Protein

 
  TAD: transactivation domain, PY: PPPSY sequence
Description 457 amino acids; about 55 kDa protein; KLF5 protein undergoes numerous post translational modifications: phosphorylation, acetylation, and ubiquitination. The major transactivation domain is proline rich and contains a PY motif (324-328), which can bind to E3 ubiquitin ligase WWP1. Three zinc finger domains at C-terminus can bind to GC rich DNA sequence.
Expression widely expressed in intestine, prostate, breast, lung, bladder, pancreas, placenta, uterus, skin, and skeletal muscle.
Localisation nucleus
Function KLF5 is a transcription factor. Many KLF5 target genes, such as PDGFa, PPARg, NFkB, cyclinD1, KLF4, and TCR, have been identified in different cell models. KLF5 regulates cell proliferation, cell cycle, apoptosis, and differentiation. KLF5 is an important transcription factor for cardiovascular remodeling and tumor angiogenesis. KLF5 is essential for mouse embryo development. Additionally, KLF5 may play an important role in several tumor types including breast, prostate, bladder, colon, esophagus, and skin.
Homology KLF5 gene is highly-conserved among species (from human to Drosophila). KLF5 belongs to the SP1/KLF transcription factor family

Mutations

Somatic The KLF5 gene is rarely mutated in human prostate cancer. One point mutation (A --> G), which change Met294 to Val, has been found in the breast cancer cell line MDA-MB-231.

Implicated in

Entity Breast cancer
Disease The KLF5 gene is deleted in about 43% breast cancer cell lines. Consistently, KLF5 mRNA is down-regulated in these cell lines. In 9 breast cancer cell lines without KLF5 mRNA loss, KLF5 protein is excessively degraded through ubiquitin-proteasome pathway. Forced expression of KLF5 inhibits T-47D cancer cell growth in vitro. In contrast, KLF5 expression is upregulated in clinical breast tumor samples (see below)
Prognosis Recently, high level of KLF5 mRNA expression is found to be associated with shorter survival for breast cancer patients. Using tissue microarray, we performed immunohistochemical staining with the anti-KLF5 Ab. The results suggest that KLF5 protein is generally weak in normal breast epithelial cells but strongly positive in breast tumors. Therefore, KLF5 expression is probably a good prognosis marker for breast cancer.
  
Entity Prostate cancer
Disease The KLF5 gene is deleted in about 33% prostate cancer cell lines/xenografts. Consistently, KLF5 mRNA is down-regulated in these samples compared to three immortalized prostate epithelial cell lines. In PC-3 prostate cancer cell line in which KLF5 mRNA is at normal high level, KLF5 protein is excessively degraded by over-expression of WWP1. KLF5 protein is highly expressed in normal prostate epithelial cells (Figure 5). Forced expression of KLF5 inhibits DU145 and 22Rv1 prostate cancer cell growth in vitro. In contrast, KLF5 knock-down decreases RWPE1 immortalized prostate epithelial cell growth in vitro. These results suggest that KLF5 may play a context dependent role in prostate cancer.
 
  
Entity Bladder cancer
Disease KLF5 mRNA is down-regulated in several bladder cancer cell lines. In TSu-Pr1 cell line, KLF5 over-expression promotes tumorigenesis in SCID mice. Consistently, KLF5 promotes cell cycle progression from G1 to S phase. Interestingly, KLF5 appears to promote tumor angiogenesis. Microarray analysis identified a number of angiogenic factors that are potentially regulated by KLF5, including HBP17, TGFa, and PDGFa. These findings suggest that the KLF5 transcription factor may play an oncogenic role in bladder cancer.
 
  
Entity Intestinal and colon cancer
Disease Down-regulation of KLF5 may be an early event in intestinal tumorigenesis. Expression of KLF5 in non-transformed intestinal epithelial cells enhances cell growth; however, KLF5 inhibits cell growth in colon cancer cell lines. Another group found that all-trans retinoic acid inhibits intestinal epithelial cell growth in vitro through inhibiting KLF5 expression. At the same time, lipopolysaccharide (LPS) induces proinflammatory response in intestinal epithelial cells through inducing KLF5 expression. These findings suggest that KLF5 may play an important but yet to be identified role in intestinal and colon cancer.
  
Entity Esophagus cancer
Disease KLF5 is expressed in proliferating cells of the gastrointestinal tract, including the esophagus. Expression of KLF5 in a poorly differentiated esophageal squamous cancer cell line TE2 inhibits proliferation and invasion, decreases viability after treatment with hydrogen peroxide and UV irradiation, and increases anoikis. KLF5 upregulates the cdk inhibitor p21(waf1/cip1) and pro-apoptotic protein BAX following UV irradiation.
  
Entity Skin cancer
Disease KLF5 is expressed predominantly in the basal layers of the developing epidermis, in the basal layers of cells of the inner root sheath, and in matrix cells of adult human hair follicles. In a transgenic mouse model, KLF5 over-expression in the basal layers of the epidermis causes abnormal epidermal development and differentiation. KLF5 over-expression may decrease the proliferation of stem cell populations of bulge keratinocytes.
  
Entity Cardiovascular remodeling
Disease KLF5 hemizygous knock-out mice reduce cardiac hypertrophy and interstitial fibrosis upon infusion of angiotensin II. Additionally, KLF5 may play a role in antherosclerosis and restenosis through regulating vascular smooth muscle cells.
  

External links

Nomenclature
HGNC (Hugo)KLF5   6349
Cards
AtlasKLF5ID41074ch13q21
Entrez_Gene (NCBI)KLF5  688  Kruppel-like factor 5 (intestinal)
GeneCards (Weizmann)KLF5
Ensembl (Hinxton)ENSG00000102554 [Gene_View]  chr13:73629114-73651680 [Contig_View]  KLF5 [Vega]
ICGC DataPortalENSG00000102554
cBioPortalKLF5
AceView (NCBI)KLF5
Genatlas (Paris)KLF5
WikiGenes688
SOURCE (Princeton)NM_001286818 NM_001730
Genomic and cartography
GoldenPath (UCSC)KLF5  -  13q22.1   chr13:73629114-73651680 +  13q21.3   [Description]    (hg19-Feb_2009)
EnsemblKLF5 - 13q21.3 [CytoView]
Mapping of homologs : NCBIKLF5 [Mapview]
OMIM602903   
Gene and transcription
Genbank (Entrez)AB030824 AF132818 AF287272 AK131397 AK296900
RefSeq transcript (Entrez)NM_001286818 NM_001730
RefSeq genomic (Entrez)AC_000145 NC_000013 NC_018924 NT_024524 NW_001838081 NW_004929388
Consensus coding sequences : CCDS (NCBI)KLF5
Cluster EST : UnigeneHs.508234 [ NCBI ]
CGAP (NCI)Hs.508234
Alternative Splicing : Fast-db (Paris)GSHG0008169
Alternative Splicing GalleryENSG00000102554
Gene ExpressionKLF5 [ NCBI-GEO ]     KLF5 [ SEEK ]   KLF5 [ MEM ]
Protein : pattern, domain, 3D structure
UniProt/SwissProtQ13887 (Uniprot)
NextProtQ13887  [Medical]
With graphics : InterProQ13887
Splice isoforms : SwissVarQ13887 (Swissvar)
Domaine pattern : Prosite (Expaxy)ZINC_FINGER_C2H2_1 (PS00028)    ZINC_FINGER_C2H2_2 (PS50157)   
Domains : Interpro (EBI)Znf_C2H2 [organisation]   Znf_C2H2-like [organisation]   Znf_C2H2/integrase_DNA-bd [organisation]  
Related proteins : CluSTrQ13887
Domain families : Pfam (Sanger)
Domain families : Pfam (NCBI)
Domain families : Smart (EMBL)ZnF_C2H2 (SM00355)  
DMDM Disease mutations688
Blocks (Seattle)Q13887
PDB (SRS)2EBT   
PDB (PDBSum)2EBT   
PDB (IMB)2EBT   
PDB (RSDB)2EBT   
Human Protein AtlasENSG00000102554 [gene] [tissue] [antibody] [cell] [cancer]
Peptide AtlasQ13887
HPRD04212
IPIIPI00015934   IPI01012072   IPI01012474   IPI00816138   
Protein Interaction databases
DIP (DOE-UCLA)Q13887
IntAct (EBI)Q13887
FunCoupENSG00000102554
BioGRIDKLF5
InParanoidQ13887
Interologous Interaction database Q13887
IntegromeDBKLF5
STRING (EMBL)KLF5
Ontologies - Pathways
Ontology : AmiGORNA polymerase II core promoter proximal region sequence-specific DNA binding  RNA polymerase II core promoter proximal region sequence-specific DNA binding transcription factor activity involved in positive regulation of transcription  angiogenesis  protein binding  nucleus  nucleolus  cytoplasm  Golgi apparatus  plasma membrane  transcription from RNA polymerase II promoter  positive regulation of cell proliferation  microvillus assembly  skeletal muscle cell differentiation  intracellular membrane-bounded organelle  positive regulation of transcription from RNA polymerase II promoter  metal ion binding  cellular response to organic cyclic compound  cellular response to peptide  
Ontology : EGO-EBIRNA polymerase II core promoter proximal region sequence-specific DNA binding  RNA polymerase II core promoter proximal region sequence-specific DNA binding transcription factor activity involved in positive regulation of transcription  angiogenesis  protein binding  nucleus  nucleolus  cytoplasm  Golgi apparatus  plasma membrane  transcription from RNA polymerase II promoter  positive regulation of cell proliferation  microvillus assembly  skeletal muscle cell differentiation  intracellular membrane-bounded organelle  positive regulation of transcription from RNA polymerase II promoter  metal ion binding  cellular response to organic cyclic compound  cellular response to peptide  
Protein Interaction DatabaseKLF5
Wikipedia pathwaysKLF5
Gene fusion - rearrangments
Polymorphisms : SNP, mutations, diseases
SNP Single Nucleotide Polymorphism (NCBI)KLF5
snp3D : Map Gene to Disease688
SNP (GeneSNP Utah)KLF5
SNP : HGBaseKLF5
Genetic variants : HAPMAPKLF5
Exome VariantKLF5
1000_GenomesKLF5 
ICGC programENSG00000102554 
Somatic Mutations in Cancer : COSMICKLF5 
CONAN: Copy Number AnalysisKLF5 
Mutations and Diseases : HGMDKLF5
Genomic VariantsKLF5  KLF5 [DGVbeta]
dbVarKLF5
ClinVarKLF5
Pred. of missensesPolyPhen-2  SIFT(SG)  SIFT(JCVI)  Align-GVGD  MutAssessor  Mutanalyser  
Pred. splicesGeneSplicer  Human Splicing Finder  MaxEntScan  
Diseases
OMIM602903   
MedgenKLF5
GENETestsKLF5
Disease Genetic AssociationKLF5
Huge Navigator KLF5 [HugePedia]  KLF5 [HugeCancerGEM]
General knowledge
Homologs : HomoloGeneKLF5
Homology/Alignments : Family Browser (UCSC)KLF5
Phylogenetic Trees/Animal Genes : TreeFamKLF5
Chemical/Protein Interactions : CTD688
Chemical/Pharm GKB GenePA30139
Clinical trialKLF5
Cancer Resource (Charite)ENSG00000102554
Other databases
Probes
Litterature
PubMed117 Pubmed reference(s) in Entrez
CoreMineKLF5
iHOPKLF5
OncoSearchKLF5

Bibliography

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REVIEW articlesautomatic search in PubMed
Last year publicationsautomatic search in PubMed

Search in all EBI   NCBI

Contributor(s)

Written10-2006Ceshi Chen, Yinfa Zhou, Jin-Tang Dong
The Center for Cell Biology and Cancer Research Albany Medical College MS355/350, Mail code 165, 47 New Scotland Ave. Albany, NY 12208, USA

Citation

This paper should be referenced as such :
Dong, JT ; Zhou, Y ; Chen, C
KLF5 (Kruppel-like factor 5 (intestinal))
Atlas Genet Cytogenet Oncol Haematol. 2007;11(1):19-22.
Free online version   Free pdf version   [Bibliographic record ]
URL : http://AtlasGeneticsOncology.org/Genes/KLF5ID41074ch13q21.html

© Atlas of Genetics and Cytogenetics in Oncology and Haematology
indexed on : Wed Jul 30 16:47:29 CEST 2014

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