KRT20 keratin 20 [Homo sapiens (human)] - Gene

Summary

Official Symbol: KRT20provided by HGNC
Official Full Name: keratin 20provided by HGNC
Primary source: HGNC:HGNC:20412
See related: Ensembl:ENSG00000171431 MIM:608218; AllianceGenome:HGNC:20412
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: K20; CD20; CK20; CK-20; KRT21
Summary: 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]
Expression: Biased expression in small intestine (RPKM 435.8), colon (RPKM 405.3) and 3 other tissues See more
Orthologs: mouse all
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Genomic context

Location:: 17q21.2

Exon count:: 8

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	17	NC_000017.11 (40875889..40885242, complement)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	17	NC_060941.1 (41740198..41749557, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	17	NC_000017.10 (39032141..39041494, complement)

Chromosome 17 - NC_000017.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: HPA RNA-seq normal tissues HPA RNA-seq normal tissues
Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
BioProject: PRJEB4337
Publication: PMID 24309898
Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Expression of cytokeratin 7/20 and Ki67 in Helicobacter pylori-associated gastritis and intestinal metaplasia.
Title: Expression of cytokeratin 7/20 and Ki67 in Helicobacter pylori-associated gastritis and intestinal metaplasia.
Relevance of CD20 antigen expression among paediatric patients with B-lineage acute lymphoblastic leukaemia.
Title: Relevance of CD20 antigen expression among paediatric patients with B-lineage acute lymphoblastic leukaemia.
Loss of CD20 expression as a mechanism of resistance to mosunetuzumab in relapsed/refractory B-cell lymphomas.
Title: Loss of CD20 expression as a mechanism of resistance to mosunetuzumab in relapsed/refractory B-cell lymphomas.
The Association of P53, CK29, and FGFR3 Overexpression with the Characteristics of Urothelial Cell Carcinoma of the Bladder.
Title: P53, CK20, and FGFR3 Overexpression is Associated with the Characteristics of Urothelial Cell Carcinoma of the Bladder.
Significance of Intraperitoneal-free KRT20 and CEACAM6 mRNA Expression for Peritoneal Recurrence of Gastric Cancer.
Title: Significance of Intraperitoneal-free KRT20 and CEACAM6 mRNA Expression for Peritoneal Recurrence of Gastric Cancer.
Identifying KRT20 as a Potential Key Gene in Lymphatic Metastasis of Head and Neck Squamous Cell Carcinoma.
Title: Identifying KRT20 as a Potential Key Gene in Lymphatic Metastasis of Head and Neck Squamous Cell Carcinoma.
Cytokeratin 7 and cytokeratin 20 expression in cancer: A tissue microarray study on 15,424 cancers.
Title: Cytokeratin 7 and cytokeratin 20 expression in cancer: A tissue microarray study on 15,424 cancers.
Supervised machine learning algorithm identified KRT20, BATF and TP63 as biologically relevant biomarkers for bladder biopsy specimens from interstitial cystitis/bladder pain syndrome patients.
Title: Supervised machine learning algorithm identified KRT20, BATF and TP63 as biologically relevant biomarkers for bladder biopsy specimens from interstitial cystitis/bladder pain syndrome patients.
Biomarkers CDX2, CK20, CK7 in Schoolchildren with Gastritis in the Realization of Familial Predisposition of Stomach Cancer.
Title: Biomarkers CDX2, CK20, CK7 in Schoolchildren with Gastritis in the Realization of Familial Predisposition of Stomach Cancer.
Differential expression of CK7, CK20, CDX2 in intestinal and pancreatobiliary types of preriampullary carcinoma.
Title: Differential expression of CK7, CK20, CDX2 in intestinal and pancreatobiliary types of preriampullary carcinoma.

Submit: New GeneRIF Correction See all GeneRIFs (95)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

EBI GWAS Catalog

Description
Identification of 15 loci influencing height in a Korean population. EBI GWAS Catalog EBI GWAS CatalogPubMed

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

RH18130 (e-PCR)
- UniSTS:52532

D17S1996 (e-PCR)
- UniSTS:19032

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables structural constituent of cytoskeleton	NAS Non-traceable Author Statement more info	PubMed

Process	Evidence Code	Pubs
involved_in apoptotic process	IEA Inferred from Electronic Annotation more info
involved_in cellular response to starvation	IEA Inferred from Electronic Annotation more info
involved_in epithelial cell differentiation	IBA Inferred from Biological aspect of Ancestor more info
involved_in intermediate filament organization	IBA Inferred from Biological aspect of Ancestor more info
involved_in intermediate filament organization	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in regulation of protein secretion	IEA Inferred from Electronic Annotation more info

Component	Evidence Code	Pubs
located_in cytoplasm	IDA Inferred from Direct Assay more info	PubMed
is_active_in cytoskeleton	IBA Inferred from Biological aspect of Ancestor more info
located_in cytosol	IDA Inferred from Direct Assay more info
located_in cytosol	TAS Traceable Author Statement more info
located_in intermediate filament	NAS Non-traceable Author Statement more info	PubMed
located_in intermediate filament cytoskeleton	IDA Inferred from Direct Assay more info

General protein information

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Preferred Names: keratin, type I cytoskeletal 20

Names: cytokeratin 20; keratin 20, type I; protein IT

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.