Keratin 18

Keratin 18


Keratin 18
Identifiers
Symbols KRT18; CYK18; K18
External IDs OMIM148070 MGI96692 HomoloGene55448 GeneCards: KRT18 Gene
RNA expression pattern
PBB GE KRT18 201596 x at tn.png
More reference expression data
Orthologs
Species Human Mouse
Entrez 3875 16668
Ensembl ENSG00000111057 ENSMUSG00000023043
UniProt P05783 P05784
RefSeq (mRNA) NM_000224.2 NM_010664.2
RefSeq (protein) NP_000215.1 NP_034794.2
Location (UCSC) Chr 12:
53.34 – 53.35 Mb
Chr 15:
101.86 – 101.86 Mb
PubMed search [1] [2]

Keratin 18 is a type I cytokeratin. It is, together with its filament partner keratin 8, perhaps the most commonly found products of the intermediate filament gene family. They are expressed in single layer epithelial tissues of the body. Mutations in this gene have been linked to cryptogenic cirrhosis. Two transcript variants encoding the same protein have been found for this gene.[1]

Keratin 18 is often used together with keratin 8 and keratin 19 to differentiate cells of epithelial origin from hematopoietic cells in tests that enumerate circulating tumor cells in blood.[2]

Interactions

Keratin 18 has been shown to interact with Collagen, type XVII, alpha 1,[3] DNAJB6,[4] Pinin[5] and TRADD.[6]

References

  1. ^ "Entrez Gene: KRT18 keratin 18". http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=3875. 
  2. ^ W. Jeffrey Allard, Jeri Matera, M. Craig Miller, et al. (October 2004). "Tumor Cells Circulate in the Peripheral Blood of All Major Carcinomas but not in Healthy Subjects or Patients With Nonmalignant Diseases". Clin. Cancer Research 10 (20): 6897–6904. doi:10.1158/1078-0432.CCR-04-0378. PMID 15501967. 
  3. ^ Aho, S; Uitto J (Mar. 1999). "180-kD bullous pemphigoid antigen/type XVII collagen: tissue-specific expression and molecular interactions with keratin 18". J. Cell. Biochem. (UNITED STATES) 72 (3): 356–67. doi:10.1002/(SICI)1097-4644(19990301)72:3<356::AID-JCB5>3.0.CO;2-M. ISSN 0730-2312. PMID 10022517. 
  4. ^ Izawa, I; Nishizawa M, Ohtakara K, Ohtsuka K, Inada H, Inagaki M (Nov. 2000). "Identification of Mrj, a DnaJ/Hsp40 family protein, as a keratin 8/18 filament regulatory protein". J. Biol. Chem. (UNITED STATES) 275 (44): 34521–7. doi:10.1074/jbc.M003492200. ISSN 0021-9258. PMID 10954706. 
  5. ^ Shi, J; Sugrue S P (May. 2000). "Dissection of protein linkage between keratins and pinin, a protein with dual location at desmosome-intermediate filament complex and in the nucleus". J. Biol. Chem. (UNITED STATES) 275 (20): 14910–5. doi:10.1074/jbc.275.20.14910. ISSN 0021-9258. PMID 10809736. 
  6. ^ Inada, H; Izawa I, Nishizawa M, Fujita E, Kiyono T, Takahashi T, Momoi T, Inagaki M (Oct. 2001). "Keratin attenuates tumor necrosis factor-induced cytotoxicity through association with TRADD". J. Cell Biol. (United States) 155 (3): 415–26. doi:10.1083/jcb.200103078. ISSN 0021-9525. PMC 2150850. PMID 11684708. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2150850. 

Further reading



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