KLF4

Kruppel-like factor 4 (gut)
Identifiers
Symbols	KLF4; EZF; GKLF
External IDs	OMIM: 602253 MGI: 1342287 HomoloGene: 3123 GeneCards: KLF4 Gene
Gene Ontology Molecular function • core promoter proximal region sequence-specific DNA binding • sequence-specific DNA binding transcription factor recruiting transcription factor activity • RNA polymerase II core promoter proximal region sequence-specific DNA binding transcription factor activity involved in positive regulation of transcription • RNA polymerase II transcription factor binding • RNA polymerase II transcription factor binding transcription factor activity involved in positive regulation of transcription • double-stranded DNA binding • sequence-specific DNA binding transcription factor activity • zinc ion binding • phosphatidylinositol 3-kinase regulator activity • transcription regulatory region DNA binding • metal ion binding Cellular component • nuclear chromatin • transcription factor complex Biological process • negative regulation of transcription from RNA polymerase II promoter • transcription from RNA polymerase II promoter • mesodermal cell fate determination • negative regulation of cell proliferation • epidermal cell differentiation • negative regulation of phosphatidylinositol 3-kinase cascade • negative regulation of muscle hyperplasia • stem cell maintenance • post-embryonic camera-type eye development • negative regulation of NF-kappaB transcription factor activity • response to retinoic acid • negative regulation of heterotypic cell-cell adhesion • post-embryonic hemopoiesis • negative regulation of cysteine-type endopeptidase activity involved in apoptotic process • negative regulation of interleukin-8 biosynthetic process • fat cell differentiation • regulation of cell differentiation • negative regulation of transcription, DNA-dependent • positive regulation of transcription, DNA-dependent • positive regulation of transcription from RNA polymerase II promoter • positive regulation of hemoglobin biosynthetic process • negative regulation of smooth muscle cell proliferation • epidermis morphogenesis • negative regulation of inflammatory response • positive regulation of protein metabolic process • negative regulation of protein kinase B signaling cascade • negative regulation of response to cytokine stimulus • negative regulation of ERK1 and ERK2 cascade • cellular response to growth factor stimulus • negative regulation of cell migration involved in sprouting angiogenesis • negative regulation of chemokine (C-X-C motif) ligand 2 production Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	9314	16600
Ensembl	ENSG00000136826	ENSMUSG00000003032
UniProt	O43474	Q60793
RefSeq (mRNA)	NM_004235	NM_010637
RefSeq (protein)	NP_004226	NP_034767
Location (UCSC)	Chr 9: 110.25 – 110.25 Mb	Chr 4: 55.53 – 55.53 Mb
PubMed search	[1]	[2]

Kruppel-like factor 4 is a protein that in humans is encoded by the KLF4 gene. In embryonic stem cells (ESCs), KLF4 has been demonstrated to be a good indicator of stem-like capacity. It is suggested that the same is true in mesenchymal stem cells (MSCs).

Interactions

KLF4 has been shown to interact with CREB-binding protein.

It was found that the transcription factor Klf4 present at the promoter of an enzymatic subunit of telomerase (TERT), where it formed a complex with β-catenin. Klf4 was required for accumulation of β-catenin at the Tert promoter but was unable to stimulate Tert expression in the absence of β-catenin.

See also

• Kruppel-like factors

Further reading

• Rowland BD, Peeper DS (2006). "KLF4, p21 and context-dependent opposing forces in cancer.". Nat. Rev. Cancer 6 (1): 11–23. doi:10.1038/nrc1780. PMID 16372018. 
• Shields JM, Christy RJ, Yang VW (1996). "Identification and characterization of a gene encoding a gut-enriched Krüppel-like factor expressed during growth arrest.". J. Biol. Chem. 271 (33): 20009–17. doi:10.1074/jbc.271.33.20009. PMC 2330254. PMID 8702718. 
• Garrett-Sinha LA, Eberspaecher H, Seldin MF, de Crombrugghe B (1997). "A gene for a novel zinc-finger protein expressed in differentiated epithelial cells and transiently in certain mesenchymal cells.". J. Biol. Chem. 271 (49): 31384–90. doi:10.1074/jbc.271.49.31384. PMID 8940147. 
• Yet SF, McA'Nulty MM, Folta SC, et al. (1998). "Human EZF, a Krüppel-like zinc finger protein, is expressed in vascular endothelial cells and contains transcriptional activation and repression domains.". J. Biol. Chem. 273 (2): 1026–31. doi:10.1074/jbc.273.2.1026. PMID 9422764. 
• Zhang W, Shields JM, Sogawa K, et al. (1998). "The gut-enriched Krüppel-like factor suppresses the activity of the CYP1A1 promoter in an Sp1-dependent fashion.". J. Biol. Chem. 273 (28): 17917–25. doi:10.1074/jbc.273.28.17917. PMC 2275057. PMID 9651398. 
• Foster KW, Ren S, Louro ID, et al. (1999). "Oncogene expression cloning by retroviral transduction of adenovirus E1A-immortalized rat kidney RK3E cells: transformation of a host with epithelial features by c-MYC and the zinc finger protein GKLF.". Cell Growth Differ. 10 (6): 423–34. PMID 10392904. 
• Segre JA, Bauer C, Fuchs E (1999). "Klf4 is a transcription factor required for establishing the barrier function of the skin.". Nat. Genet. 22 (4): 356–60. doi:10.1038/11926. PMID 10431239. 
• Geiman DE, Ton-That H, Johnson JM, Yang VW (2000). "Transactivation and growth suppression by the gut-enriched Krüppel-like factor (Krüppel-like factor 4) are dependent on acidic amino acid residues and protein-protein interaction.". Nucleic Acids Res. 28 (5): 1106–13. doi:10.1093/nar/28.5.1106. PMC 102607. PMID 10666450. 
• Zhang W, Geiman DE, Shields JM, et al. (2000). "The gut-enriched Kruppel-like factor (Kruppel-like factor 4) mediates the transactivating effect of p53 on the p21WAF1/Cip1 promoter.". J. Biol. Chem. 275 (24): 18391–8. doi:10.1074/jbc.C000062200. PMC 2231805. PMID 10749849. 
• Okano J, Opitz OG, Nakagawa H, et al. (2000). "The Krüppel-like transcriptional factors Zf9 and GKLF coactivate the human keratin 4 promoter and physically interact.". FEBS Lett. 473 (1): 95–100. doi:10.1016/S0014-5793(00)01468-X. PMID 10802067. 
• Higaki Y, Schullery D, Kawata Y, et al. (2002). "Synergistic activation of the rat laminin gamma1 chain promoter by the gut-enriched Kruppel-like factor (GKLF/KLF4) and Sp1.". Nucleic Acids Res. 30 (11): 2270–9. doi:10.1093/nar/30.11.2270. PMC 117209. PMID 12034813. 
• Chen ZY, Shie JL, Tseng CC (2003). "Gut-enriched Kruppel-like factor represses ornithine decarboxylase gene expression and functions as checkpoint regulator in colonic cancer cells.". J. Biol. Chem. 277 (48): 46831–9. doi:10.1074/jbc.M204816200. PMID 12297499. 
• Yoon HS, Chen X, Yang VW (2003). "Kruppel-like factor 4 mediates p53-dependent G1/S cell cycle arrest in response to DNA damage.". J. Biol. Chem. 278 (4): 2101–5. doi:10.1074/jbc.M211027200. PMC 2229830. PMID 12427745. 
• Wang N, Liu ZH, Ding F, et al. (2003). "Down-regulation of gut-enriched Kruppel-like factor expression in esophageal cancer.". World J. Gastroenterol. 8 (6): 966–70. PMID 12439907. 
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932. 
• Chen X, Whitney EM, Gao SY, Yang VW (2003). "Transcriptional profiling of Krüppel-like factor 4 reveals a function in cell cycle regulation and epithelial differentiation.". J. Mol. Biol. 326 (3): 665–77. doi:10.1016/S0022-2836(02)01449-3. PMC 2693487. PMID 12581631. 
• Dang DT, Chen X, Feng J, et al. (2003). "Overexpression of Krüppel-like factor 4 in the human colon cancer cell line RKO leads to reduced tumorigenecity.". Oncogene 22 (22): 3424–30. doi:10.1038/sj.onc.1206413. PMC 2275074. PMID 12776194. 
• Mao Z, Song S, Zhu Y, et al. (2003). "Transcriptional regulation of A33 antigen expression by gut-enriched Krüppel-like factor.". Oncogene 22 (28): 4434–43. doi:10.1038/sj.onc.1206508. PMID 12853980. 
• Ohnishi S, Ohnami S, Laub F, et al. (2003). "Downregulation and growth inhibitory effect of epithelial-type Krüppel-like transcription factor KLF4, but not KLF5, in bladder cancer.". Biochem. Biophys. Res. Commun. 308 (2): 251–6. doi:10.1016/S0006-291X(03)01356-1. PMID 12901861. 
• Hinnebusch BF, Siddique A, Henderson JW, et al. (2004). "Enterocyte differentiation marker intestinal alkaline phosphatase is a target gene of the gut-enriched Kruppel-like factor.". Am. J. Physiol. Gastrointest. Liver Physiol. 286 (1): G23–30. doi:10.1152/ajpgi.00203.2003. PMID 12919939. 

External links

• KLF4 protein, human at the US National Library of Medicine Medical Subject Headings (MeSH)
• KLF4 microarray expression results and literature

This article incorporates text from the United States National Library of Medicine, which is in the public domain.