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Aliases for KRT20 Gene

Aliases for KRT20 Gene

  • Keratin 20, Type I 2 3
  • Cytokeratin-20 3 4
  • Protein IT 3 4
  • Keratin-20 3 4
  • KRT21 3 6
  • CK-20 3 4
  • CD20 3 6
  • K20 3 4
  • Keratin, Type I Cytoskeletal 20 3
  • Cytokeratin 20 3
  • Keratin 20 2
  • CK20 3

External Ids for KRT20 Gene

Previous GeneCards Identifiers for KRT20 Gene

  • GC17M038532
  • GC17M041208
  • GC17M038940
  • GC17M039405
  • GC17M036285
  • GC17M039030
  • GC17M034826

Summaries for KRT20 Gene

Entrez Gene Summary for KRT20 Gene

  • The protein encoded by this gene is a member of the keratin family. The keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into cytokeratins and hair keratins. The type I cytokeratins consist of acidic proteins which are arranged in pairs of heterotypic keratin chains. This cytokeratin is a major cellular protein of mature enterocytes and goblet cells and is specifically expressed in the gastric and intestinal mucosa. The type I cytokeratin genes are clustered in a region of chromosome 17q12-q21. [provided by RefSeq, Jul 2008]

GeneCards Summary for KRT20 Gene

KRT20 (Keratin 20, Type I) is a Protein Coding gene. Diseases associated with KRT20 include jejunal adenocarcinoma and seminal vesicle adenocarcinoma. GO annotations related to this gene include structural constituent of cytoskeleton. An important paralog of this gene is KRT34.

UniProtKB/Swiss-Prot for KRT20 Gene

  • Plays a significant role in maintaining keratin filament organization in intestinal epithelia. When phosphorylated, plays a role in the secretion of mucin in the small intestine (By similarity).

Gene Wiki entry for KRT20 Gene

No data available for Tocris Summary , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for KRT20 Gene

Genomics for KRT20 Gene

Regulatory Elements for KRT20 Gene

Genomic Location for KRT20 Gene

40,875,889 bp from pter
40,885,243 bp from pter
9,355 bases
Minus strand

Genomic View for KRT20 Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for KRT20 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for KRT20 Gene

Proteins for KRT20 Gene

  • Protein details for KRT20 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Keratin, type I cytoskeletal 20
    Protein Accession:
    Secondary Accessions:
    • B2R6W7

    Protein attributes for KRT20 Gene

    424 amino acids
    Molecular mass:
    48487 Da
    Quaternary structure:
    • Heterotetramer of two type I and two type II keratins. Associates with KRT8
    • There are two types of cytoskeletal and microfibrillar keratin: I (acidic; 40-55 kDa) and II (neutral to basic; 56-70 kDa)

neXtProt entry for KRT20 Gene

Proteomics data for KRT20 Gene at MOPED

Post-translational modifications for KRT20 Gene

  • Hyperphosphorylation at Ser-13 occurs during the early stages of apoptosis but becomes less prominent during the later stages. Phosphorylation at Ser-13 also increases in response to stress brought on by cell injury (By similarity).
  • Proteolytically cleaved by caspases during apoptosis. Cleavage occurs at Asp-228.
  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for KRT20 Gene

ENSEMBL proteins:
REFSEQ proteins:

Antibody Products

  • Cell Signaling Technology (CST) Antibodies for KRT20 (K20)

No data available for DME Specific Peptides for KRT20 Gene

Domains for KRT20 Gene

Gene Families for KRT20 Gene

  • IFF1 :Intermediate filaments type I, keratins (acidic)

Protein Domains for KRT20 Gene

Suggested Antigen Peptide Sequences for KRT20 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • P35900
  • Belongs to the intermediate filament family.
genes like me logo Genes that share domains with KRT20: view

Function for KRT20 Gene

Molecular function for KRT20 Gene

UniProtKB/Swiss-Prot Function: Plays a significant role in maintaining keratin filament organization in intestinal epithelia. When phosphorylated, plays a role in the secretion of mucin in the small intestine (By similarity).

Gene Ontology (GO) - Molecular Function for KRT20 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005198 structural molecule activity --
GO:0005200 structural constituent of cytoskeleton NAS 8359595
GO:0005515 protein binding IPI 16189514
genes like me logo Genes that share ontologies with KRT20: view

miRNA Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for KRT20

In Situ Assay Products

Flow Cytometry Products

No data available for Enzyme Numbers (IUBMB) , Phenotypes , Animal Models , miRNA , Transcription Factor Targeting and HOMER Transcription for KRT20 Gene

Localization for KRT20 Gene

Subcellular locations from UniProtKB/Swiss-Prot for KRT20 Gene


Subcellular locations from

Jensen Localization Image for KRT20 Gene COMPARTMENTS Subcellular localization image for KRT20 gene
Compartment Confidence
cytoskeleton 5
cytosol 3
mitochondrion 3
nucleus 2
extracellular 1
plasma membrane 1

Gene Ontology (GO) - Cellular Components for KRT20 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005737 cytoplasm IDA 10973561
GO:0005882 intermediate filament NAS 8359595
genes like me logo Genes that share ontologies with KRT20: view

Pathways for KRT20 Gene

SuperPathways for KRT20 Gene

No Data Available

Gene Ontology (GO) - Biological Process for KRT20 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0006915 apoptotic process IEA --
GO:0033554 cellular response to stress IEA --
GO:0045109 intermediate filament organization IMP 12857878
GO:0050708 regulation of protein secretion IEA --
genes like me logo Genes that share ontologies with KRT20: view

No data available for Pathways by source for KRT20 Gene

Compounds for KRT20 Gene

(17) Novoseek inferred chemical compound relationships for KRT20 Gene

Compound -log(P) Hits PubMed IDs
mucicarmine 78.6 6
paraffin 53.9 15
estrogen 50.7 52
progesterone 50 40
hematoxylin 47.5 7
genes like me logo Genes that share compounds with KRT20: view

Transcripts for KRT20 Gene

mRNA/cDNA for KRT20 Gene

(60) Selected AceView cDNA sequences:
(3) Additional mRNA sequences :
(1) REFSEQ mRNAs :
(2) Ensembl transcripts including schematic representations, and UCSC links where relevant :

Unigene Clusters for KRT20 Gene

Keratin 20:
Representative Sequences:

miRNA Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for KRT20

Primer Products

Flow Cytometry Products

Alternative Splicing Database (ASD) splice patterns (SP) for KRT20 Gene

No ASD Table

Relevant External Links for KRT20 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for KRT20 Gene

mRNA expression in normal human tissues for KRT20 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for KRT20 Gene

This gene is overexpressed in Colon - Transverse (36.8) and Small Intestine - Terminal Ileum (13.0).

Integrated Proteomics: protein expression from ProteomicsDB, PaxDb, and MOPED for KRT20 Gene

SOURCE GeneReport for Unigene cluster for KRT20 Gene Hs.84905

mRNA Expression by UniProt/SwissProt for KRT20 Gene

Tissue specificity: Expressed predominantly in the intestinal epithelium. Expressed in luminal cells of colonic mucosa. Also expressed in the Merkel cells of keratinized oral mucosa; specifically at the tips of some rete ridges of the gingival mucosa, in the basal layer of the palatal mucosa and in the taste buds of lingual mucosa.
genes like me logo Genes that share expressions with KRT20: view

In Situ Assay Products

Orthologs for KRT20 Gene

This gene was present in the common ancestor of chordates.

Orthologs for KRT20 Gene

Organism Taxonomy Gene Similarity Type Details
(Pan troglodytes)
Mammalia KRT20 35
  • 99.37 (n)
  • 99.29 (a)
KRT20 36
  • 99 (a)
(Bos Taurus)
Mammalia KRT20 35
  • 81.81 (n)
  • 76.4 (a)
KRT20 36
  • 54 (a)
(Canis familiaris)
Mammalia KRT20 35
  • 80.33 (n)
  • 71.33 (a)
KRT20 36
  • 70 (a)
(Mus musculus)
Mammalia Krt20 35
  • 80.82 (n)
  • 79.72 (a)
Krt20 16
Krt20 36
  • 78 (a)
(Monodelphis domestica)
Mammalia KRT20 36
  • 61 (a)
(Ornithorhynchus anatinus)
Mammalia -- 36
  • 59 (a)
-- 36
  • 49 (a)
(Rattus norvegicus)
Mammalia Krt20 35
  • 80.73 (n)
  • 81.28 (a)
(Gallus gallus)
Aves KRT20 35
  • 63.75 (n)
  • 57.92 (a)
KRT20 36
  • 55 (a)
(Anolis carolinensis)
Reptilia -- 36
  • 42 (a)
(Danio rerio)
Actinopterygii BX469912.1 36
  • 22 (a)
cyt1 36
  • 47 (a)
cyt1l 36
  • 47 (a)
krt1-19d 36
  • 41 (a)
krt15 36
  • 42 (a)
krt17 36
  • 46 (a)
si:dkeyp-113d7.4 36
  • 39 (a)
wu:fb17f05 36
  • 47 (a)
zgc:109868 36
  • 47 (a)
zgc:136902 36
  • 40 (a)
zgc:153629 36
  • 43 (a)
zgc:92035 36
  • 42 (a)
zgc:92061 36
  • 48 (a)
zgc:92533 36
  • 24 (a)
Species with no ortholog for KRT20:
  • A. gosspyii yeast (Ashbya gossypii)
  • Actinobacteria (Mycobacterium tuberculosis)
  • African clawed frog (Xenopus laevis)
  • African malaria mosquito (Anopheles gambiae)
  • Alicante grape (Vitis vinifera)
  • alpha proteobacteria (Wolbachia pipientis)
  • amoeba (Dictyostelium discoideum)
  • Archea (Pyrococcus horikoshii)
  • baker's yeast (Saccharomyces cerevisiae)
  • barley (Hordeum vulgare)
  • beta proteobacteria (Neisseria meningitidis)
  • bread mold (Neurospora crassa)
  • Chromalveolata (Phytophthora infestans)
  • common water flea (Daphnia pulex)
  • corn (Zea mays)
  • E. coli (Escherichia coli)
  • filamentous fungi (Aspergillus nidulans)
  • Firmicute bacteria (Streptococcus pneumoniae)
  • fission yeast (Schizosaccharomyces pombe)
  • fruit fly (Drosophila melanogaster)
  • green algae (Chlamydomonas reinhardtii)
  • honey bee (Apis mellifera)
  • K. lactis yeast (Kluyveromyces lactis)
  • loblloly pine (Pinus taeda)
  • malaria parasite (Plasmodium falciparum)
  • medicago trunc (Medicago Truncatula)
  • moss (Physcomitrella patens)
  • orangutan (Pongo pygmaeus)
  • pig (Sus scrofa)
  • rainbow trout (Oncorhynchus mykiss)
  • rice (Oryza sativa)
  • rice blast fungus (Magnaporthe grisea)
  • schistosome parasite (Schistosoma mansoni)
  • sea anemone (Nematostella vectensis)
  • sea squirt (Ciona intestinalis)
  • sea squirt (Ciona savignyi)
  • sea urchin (Strongylocentrotus purpuratus)
  • sorghum (Sorghum bicolor)
  • soybean (Glycine max)
  • stem rust fungus (Puccinia graminis)
  • sugarcane (Saccharum officinarum)
  • thale cress (Arabidopsis thaliana)
  • tomato (Lycopersicon esculentum)
  • toxoplasmosis (Toxoplasma gondii)
  • Trichoplax (Trichoplax adhaerens)
  • tropical clawed frog (Silurana tropicalis)
  • wheat (Triticum aestivum)
  • worm (Caenorhabditis elegans)

Evolution for KRT20 Gene

Gene Tree for KRT20 (if available)
Gene Tree for KRT20 (if available)

Paralogs for KRT20 Gene

genes like me logo Genes that share paralogs with KRT20: view

Variants for KRT20 Gene

Sequence variations from dbSNP and Humsavar for KRT20 Gene

SNP ID Clin Chr 17 pos Sequence Context AA Info Type MAF
rs926 -- 40,876,219(-) AATCC(C/T)ATTTA utr-variant-3-prime
rs1051 -- 40,876,228(-) GGTGG(C/T)GGGAA utr-variant-3-prime
rs971812 -- 40,876,516(-) GAATA(A/T)TATAA intron-variant
rs1051337 -- 40,876,006(-) AAACC(A/T)CACAA utr-variant-3-prime
rs1894409 -- 40,877,215(-) GGCTC(A/G)CAGTT intron-variant

Relevant External Links for KRT20 Gene

HapMap Linkage Disequilibrium report
Human Gene Mutation Database (HGMD)

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot and Structural Variations from Database of Genomic Variants (DGV) for KRT20 Gene

Disorders for KRT20 Gene

(94) Novoseek inferred disease relationships for KRT20 Gene

Disease -log(P) Hits PubMed IDs
carcinoma merkel cell 90.5 44
carcinoma mucinous 81.7 14
adenocarcinoma 81.6 171
carcinoma 79.7 132
metastatic carcinoma 79.2 24

Relevant External Links for KRT20

Genetic Association Database (GAD)
Human Genome Epidemiology (HuGE) Navigator
genes like me logo Genes that share disorders with KRT20: view

No data available for UniProtKB/Swiss-Prot for KRT20 Gene

Publications for KRT20 Gene

  1. The human gene encoding cytokeratin 20 and its expression during fetal development and in gastrointestinal carcinomas. (PMID: 8359595) Moll R. … Franke W.W. (Differentiation 1993) 2 3 4 23
  2. An immunohistological study of cytokeratin 20 in human and mammalian oral epithelium. (PMID: 10973561) Barrett A.W. … Berkovitz B.K.B. (Arch. Oral Biol. 2000) 3 4 23
  3. [Significance of cytokeratin gene (CK-20 mRNA) expression in metastatic lymph nodes in colon carcinoma patients]. (PMID: 12515621) Ye X. … Chen T. (Zhonghua Zhong Liu Za Zhi 2002) 2 3 23
  4. Keratin 20 helps maintain intermediate filament organization in intestinal epithelia. (PMID: 12857878) Zhou Q. … Omary M.B. (Mol. Biol. Cell 2003) 3 4 23
  5. Added value of combined gene and protein expression of CK20 and CEA in non-macroscopically involved lymph nodes of colorectal cancer. (PMID: 19074466) D'Armento G. … Bussolati G. (Int. J. Surg. Pathol. 2009) 3 23

Products for KRT20 Gene

  • Addgene plasmids for KRT20

Sources for KRT20 Gene

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