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KRT23 keratin 23 [ Homo sapiens (human) ]

Gene ID: 25984, updated on 3-Apr-2024

Summary

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Official Symbol
KRT23provided by HGNC
Official Full Name
keratin 23provided by HGNC
Primary source
HGNC:HGNC:6438
See related
Ensembl:ENSG00000108244 MIM:606194; AllianceGenome:HGNC:6438
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
K23; CK23; HAIK1
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. The type I cytokeratin genes are clustered in a region of chromosome 17q12-q21. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]
Expression
Biased expression in placenta (RPKM 45.8), skin (RPKM 39.5) and 7 other tissues See more
Orthologs
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Genomic context

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Location:
17q21.2
Exon count:
10
Annotation release Status Assembly Chr Location
RS_2023_10 current GRCh38.p14 (GCF_000001405.40) 17 NC_000017.11 (40922700..40937646, complement)
RS_2023_10 current T2T-CHM13v2.0 (GCF_009914755.1) 17 NC_060941.1 (41787032..41801979, complement)
105.20220307 previous assembly GRCh37.p13 (GCF_000001405.25) 17 NC_000017.10 (39078952..39093898, complement)

Chromosome 17 - NC_000017.11Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC105371777 Neighboring gene keratin 12 Neighboring gene keratin 20 Neighboring gene uncharacterized LOC107985072 Neighboring gene CDK7 strongly-dependent group 2 enhancer GRCh37_chr17:39109689-39110888 Neighboring gene P300/CBP strongly-dependent group 1 enhancer GRCh37_chr17:39112787-39113986 Neighboring gene keratin 39 Neighboring gene OCT4-NANOG-H3K4me1 hESC enhancer GRCh37_chr17:39136258-39136859 Neighboring gene keratin 40

Genomic regions, transcripts, and products

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Go to nucleotide: Graphics FASTA GenBank

Expression

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  • Project title: 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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Related articles in PubMed

  1. The Overexpression of Keratin 23 Promotes Migration of Ovarian Cancer via Epithelial-Mesenchymal Transition. Ren M, et al. Biomed Res Int, 2020. PMID 33204716, Free PMC Article
  2. Identification of Keratin 23 as a Hepatitis C Virus-Induced Host Factor in the Human Liver. Kinast V, et al. Cells, 2019 Jun 18. PMID 31216713, Free PMC Article
  3. Keratin23 (KRT23) knockdown decreases proliferation and affects the DNA damage response of colon cancer cells. Birkenkamp-Demtröder K, et al. PLoS One, 2013. PMID 24039993, Free PMC Article
  4. Phosphoprotein Keratin 23 accumulates in MSS but not MSI colon cancers in vivo and impacts viability and proliferation in vitro. Birkenkamp-Demtroder K, et al. Mol Oncol, 2007 Sep. PMID 19383294, Free PMC Article
  5. Cytoplasmic intermediate filaments are stably associated with nuclear matrices and potentially modulate their DNA-binding function. Tolstonog GV, et al. DNA Cell Biol, 2002 Mar. PMID 12015898

See all (34) citations in PubMed

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
  1. The Overexpression of Keratin 23 Promotes Migration of Ovarian Cancer via Epithelial-Mesenchymal Transition.
    Title: The Overexpression of Keratin 23 Promotes Migration of Ovarian Cancer via Epithelial-Mesenchymal Transition.
  2. highly elevated in hepatocellular carcinoma
    Title: Keratin 23 Is a Peroxisome Proliferator-Activated Receptor Alpha-Dependent, MYC-Amplified Oncogene That Promotes Hepatocyte Proliferation.
  3. AUthors investigated KRT23 mRNA levels in datasets from liver biopsies of chronic hepatitis C (CHC) patients and in primary human hepatocytes experimentally infected with HCV, in addition to hepatoma cells. In each of these specimens, we observed an HCV-dependent increase of mRNA levels. Importantly, the KRT23 protein levels in patient plasma decreased upon viral clearance.
    Title: Identification of Keratin 23 as a Hepatitis C Virus-Induced Host Factor in the Human Liver.
  4. transcriptome studies identified keratin 23 as a new ductular cell marker in patients with alcoholic hepatitis
    Title: LPS-TLR4 Pathway Mediates Ductular Cell Expansion in Alcoholic Hepatitis.
  5. Data show that Keratin23 (KRT23) knockdown affected molecules of the cell cycle and DNA replication, recombination and repair.
    Title: Keratin23 (KRT23) knockdown decreases proliferation and affects the DNA damage response of colon cancer cells.
  6. Increased expression of KRT23 is associated with colorectal cancer.
    Title: Identification of putative immunologic targets for colon cancer prevention based on conserved gene upregulation from preinvasive to malignant lesions.
  7. Data suggest a regulatory circuitry involving Smad4 dependent up-regulation of KRT23 (directly or indirectly) which in turn modulates the interaction between KRT23 and 14-3-3epsilon leading to a cytoplasmic sequestration of 14-3-3epsilon.
    Title: Keratin 23, a novel DPC4/Smad4 target gene which binds 14-3-3ε.
  8. Observational study of gene-disease association and gene-environment interaction. (HuGE Navigator)
    Title: Polymorphisms in innate immunity genes and lung cancer risk in Xuanwei, China.
  9. Keratin23 expression is a novel and important difference between microsatellite-stable and microsatellite-instable colon cancers.
    Title: Phosphoprotein Keratin 23 accumulates in MSS but not MSI colon cancers in vivo and impacts viability and proliferation in vitro.
  10. Observational study of gene-disease association. (HuGE Navigator)
    Title: Genetic susceptibility to distinct bladder cancer subphenotypes.
Submit: New GeneRIF Correction

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

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Genotypes

Interactions

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Products Interactant Other Gene Complex Source Pubs Description

General gene information

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Markers

Homology

Clone Names

  • MGC26158, DKFZp434G032

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables protein binding IPI
Inferred from Physical Interaction
more info
 PubMed 
enables structural molecule activity IEA
Inferred from Electronic Annotation
more info
  
Process Evidence Code Pubs
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
  
Component Evidence Code Pubs
is_active_in cytoskeleton IBA
Inferred from Biological aspect of Ancestor
more info
  
located_in cytosol TAS
Traceable Author Statement
more info
  
located_in intermediate filament IEA
Inferred from Electronic Annotation
more info
  

General protein information

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Preferred Names
keratin, type I cytoskeletal 23
Names
CK-23
cytokeratin 23
histone deacetylase inducible keratin 23
hyperacetylation-inducible type I keratin
keratin 23 (histone deacetylase inducible)
keratin 23, type I
type I intermediate filament cytokeratin

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.

Genomic

  1. NG_012287.1 RefSeqGene

    Range
    4939..19885
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_001282433.2 → NP_001269362.1  keratin, type I cytoskeletal 23 isoform 2

    See identical proteins and their annotated locations for NP_001269362.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) differs in the 5' UTR and has multiple coding region differences, compared to variant 1. These differences cause translation initiation at a downstream AUG and result in an isoform (2) with a shorter N-terminus, compared to isoform 1.
    Source sequence(s)
    AK302109, CV373638
    Consensus CDS
    CCDS62182.1
    UniProtKB/Swiss-Prot
    Q9C075
    Related
    ENSP00000414056.3, ENST00000436344.7
    Conserved Domains (1) summary
    pfam00038
    Location:3 → 243
    Filament; Intermediate filament protein

  2. NM_015515.5 → NP_056330.3  keratin, type I cytoskeletal 23 isoform 1

    See identical proteins and their annotated locations for NP_056330.3

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) encodes the larger isoform (1)
    Source sequence(s)
    AA649738, AC004231, BC028356, DA846104
    Consensus CDS
    CCDS11380.1
    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6
    UniProtKB/TrEMBL
    Q8TC04
    Related
    ENSP00000209718.3, ENST00000209718.8
    Conserved Domains (1) summary
    pfam00038
    Location:71 → 380
    Filament; Intermediate filament protein

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2023_10

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000017.11 Reference GRCh38.p14 Primary Assembly

    Range
    40922700..40937646 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_005257200.6 → XP_005257257.1  keratin, type I cytoskeletal 23 isoform X2

    See identical proteins and their annotated locations for XP_005257257.1

    UniProtKB/Swiss-Prot
    Q9C075
    Conserved Domains (1) summary
    pfam00038
    Location:3 → 243
    Filament; Intermediate filament protein

  2. XM_047435728.1 → XP_047291684.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  3. XM_047435729.1 → XP_047291685.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  4. XM_047435727.1 → XP_047291683.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  5. XM_047435726.1 → XP_047291682.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  6. XM_011524595.3 → XP_011522897.1  keratin, type I cytoskeletal 23 isoform X2

    See identical proteins and their annotated locations for XP_011522897.1

    UniProtKB/Swiss-Prot
    Q9C075
    Conserved Domains (1) summary
    pfam00038
    Location:3 → 243
    Filament; Intermediate filament protein

Reference GRCh38.p14 ALT_REF_LOCI_1

Genomic

  1. NW_003871091.1 Reference GRCh38.p14 ALT_REF_LOCI_1

    Range
    71968..86914 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_054329715.1 → XP_054185690.1  keratin, type I cytoskeletal 23 isoform X2

  2. XM_054329712.1 → XP_054185687.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  3. XM_054329713.1 → XP_054185688.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  4. XM_054329711.1 → XP_054185686.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  5. XM_054329710.1 → XP_054185685.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  6. XM_054329709.1 → XP_054185684.1  keratin, type I cytoskeletal 23 isoform X1

    UniProtKB/Swiss-Prot
    A8K084, B7Z7J2, I3L3Q6, Q9C075, Q9NUR6

  7. XM_054329714.1 → XP_054185689.1  keratin, type I cytoskeletal 23 isoform X2

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060941.1 Alternate T2T-CHM13v2.0

    Range
    41787032..41801979 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. XM_054315674.1 → XP_054171649.1  keratin, type I cytoskeletal 23 isoform X2

  2. XM_054315671.1 → XP_054171646.1  keratin, type I cytoskeletal 23 isoform X1

  3. XM_054315672.1 → XP_054171647.1  keratin, type I cytoskeletal 23 isoform X1

  4. XM_054315670.1 → XP_054171645.1  keratin, type I cytoskeletal 23 isoform X1

  5. XM_054315669.1 → XP_054171644.1  keratin, type I cytoskeletal 23 isoform X1

  6. XM_054315673.1 → XP_054171648.1  keratin, type I cytoskeletal 23 isoform X2

Suppressed Reference Sequence(s)

The following Reference Sequences have been suppressed. Explain

  1. NM_173213.1: Suppressed sequence

    Description
    NM_173213.1: This RefSeq was permanently suppressed because currently there is insufficient support for the transcript.
Nucleotide Protein
Heading Accession and Version
Protein Accession Links
GenPept Link UniProtKB Link
Q9C075.2 GenPept UniProtKB/Swiss-Prot:Q9C075

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