CLDN23 claudin 23 [Homo sapiens (human)] - Gene

Summary

Official Symbol: CLDN23provided by HGNC
Official Full Name: claudin 23provided by HGNC
Primary source: HGNC:HGNC:17591
See related: Ensembl:ENSG00000253958 MIM:609203; AllianceGenome:HGNC:17591
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: CLDNL; hCG1646163
Summary: This gene encodes a member of the claudin family. Claudins are integral membrane proteins and components of tight junction strands. Tight junction strands serve as a physical barrier to prevent solutes and water from passing freely through the paracellular space between epithelial or endothelial cell sheets, and also play critical roles in maintaining cell polarity and signal transductions. This gene is expressed in germinal center B-cells, placenta and stomach as well as in colon tumor. This gene is down-regulated in intestinal type gastric cancer. [provided by RefSeq, Aug 2010]
Orthologs: mouse all
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Genomic context

Location:: 8p23.1

Exon count:: 1

Annotation release	Status	Assembly	Chr	Location
RS_2024_08	current	GRCh38.p14 (GCF_000001405.40)	8	NC_000008.11 (8701937..8704096)
RS_2024_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	8	NC_060932.1 (11040282..11042441, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	8	NC_000008.10 (8559447..8561606)

Chromosome 8 - NC_000008.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Claudin-23 reshapes epithelial tight junction architecture to regulate barrier function.
Title: Claudin-23 reshapes epithelial tight junction architecture to regulate barrier function.
claudin-23 facilitates the migration ability of colorectal cancer cells and may participate in the metastasis of colorectal cancer
Title: [The Expression and Biological Function of claudin-23 in Colorectal Cancer].
The expression of claudin-11, -23 was remarkably downregulated in gastric cancer.
Title: Expression of claudin-11, -23 in different gastric tissues and its relationship with the risk and prognosis of gastric cancer.
The present study demonstrated an epigenetic link between the activity of the EZH2 methyltransferase at the CLDN23 locus and the expression of CLDN23 in CRC tissue.
Title: Regulation of the expression of claudin 23 by the enhancer of zeste 2 polycomb group protein in colorectal cancer.
Down-regulation of CLDN23 is associated with colorectal cancer.
Title: Differential expression and prognostic role of selected genes in colorectal cancer patients.
Observational study of gene-disease association. (HuGE Navigator)
Title: MRPS18CP2 alleles and DEFA3 absence as putative chromosome 8p23.1 modifiers of hearing loss due to mtDNA mutation A1555G in the 12S rRNA gene.
characterization of CLDN23 gene, a candidate tumor suppressor gene implicated in intestinal-type gastric cancer
Title: CLDN23 gene, frequently down-regulated in intestinal-type gastric cancer, is a novel member of CLAUDIN gene family.
Human CLDN23, showing 79.5% total-amino-acid identity with mouse Cldn23, is a four-transmembrane protein with WWCC motif, defined by W-X(17-22)-W-X(2)-C-X(8-10)-C.
Title: CLDN23 gene, frequently down-regulated in intestinal-type gastric cancer, is a novel member of CLAUDIN gene family.

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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
Discovery of genetic biomarkers contributing to variation in drug response of cytidine analogues using human lymphoblastoid cell lines. EBI GWAS Catalog EBI GWAS CatalogPubMed
Novel genetic loci identified for the pathophysiology of childhood obesity in the Hispanic 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

NoName (e-PCR)
- UniSTS:483094

RH12660 (e-PCR)
- UniSTS:66739

RH67977 (e-PCR)
- UniSTS:65777

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables identical protein binding	ISS Inferred from Sequence or Structural Similarity more info
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 bicellular tight junction assembly	IBA Inferred from Biological aspect of Ancestor more info
involved_in calcium-independent cell-cell adhesion via plasma membrane cell-adhesion molecules	ISS Inferred from Sequence or Structural Similarity more info
involved_in cell adhesion	IBA Inferred from Biological aspect of Ancestor more info

Component	Evidence Code	Pubs
is_active_in bicellular tight junction	IBA Inferred from Biological aspect of Ancestor more info
located_in bicellular tight junction	ISS Inferred from Sequence or Structural Similarity more info
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info

General protein information

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Preferred Names: claudin-23

Names: 2310014B08Rik

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.