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Aliases for CLDN8 Gene

Aliases for CLDN8 Gene

  • Claudin 8 2 3
  • Claudin-8 3

External Ids for CLDN8 Gene

Previous GeneCards Identifiers for CLDN8 Gene

  • GC21M028163
  • GC21M028246
  • GC21M030507
  • GC21M030508
  • GC21M030509
  • GC21M031586
  • GC21M016995

Summaries for CLDN8 Gene

Entrez Gene Summary for CLDN8 Gene

  • 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 protein plays important roles in the paracellular cation barrier of the distal renal tubule, and in the paracellular barrier to prevent sodium back-leakage in distal colon. Differential expression of this gene has been observed in colorectal carcinoma and renal cell tumors, and along with claudin-7, is an immunohistochemical marker for the differential diagnosis of chromophobe renal cell carcinoma and renal oncocytoma.[provided by RefSeq, May 2010]

GeneCards Summary for CLDN8 Gene

CLDN8 (Claudin 8) is a Protein Coding gene. Diseases associated with CLDN8 include oxyphilic adenoma and chromophobe renal cell carcinoma. Among its related pathways are Integrin Pathway and Cell junction organization. GO annotations related to this gene include identical protein binding and structural molecule activity. An important paralog of this gene is CLDN9.

UniProtKB/Swiss-Prot for CLDN8 Gene

  • Plays a major role in tight junction-specific obliteration of the intercellular space.

Gene Wiki entry for CLDN8 Gene

No data available for Tocris Summary , PharmGKB "VIP" Summary , fRNAdb sequence ontologies and piRNA Summary for CLDN8 Gene

Genomics for CLDN8 Gene

Regulatory Elements for CLDN8 Gene

Genomic Location for CLDN8 Gene

30,214,006 bp from pter
30,216,151 bp from pter
2,146 bases
Minus strand

Genomic View for CLDN8 Gene

UCSC Golden Path with GeneCards custom track
Cytogenetic band:
Genomic Location for CLDN8 Gene
GeneLoc Logo Genomic Neighborhood Exon StructureGene Density

RefSeq DNA sequence for CLDN8 Gene

Proteins for CLDN8 Gene

  • Protein details for CLDN8 Gene (UniProtKB/Swiss-Prot)

    Protein Symbol:
    Recommended name:
    Protein Accession:
    Secondary Accessions:
    • D3DSE3
    • Q53EX7

    Protein attributes for CLDN8 Gene

    225 amino acids
    Molecular mass:
    24845 Da
    Quaternary structure:
    • Directly interacts with TJP1/ZO-1, TJP2/ZO-2 and TJP3/ZO-3.
    • A protein of the expected size has been detected by antibody binding and Western blot in at least one of the analyzed tissues or cells.

neXtProt entry for CLDN8 Gene

Proteomics data for CLDN8 Gene at MOPED

Post-translational modifications for CLDN8 Gene

  • Modification sites at PhosphoSitePlus
  • Modification sites at neXtProt

Other Protein References for CLDN8 Gene

ENSEMBL proteins:
Reactome Protein details:
REFSEQ proteins:

Antibody Products

No data available for DME Specific Peptides for CLDN8 Gene

Domains for CLDN8 Gene

Gene Families for CLDN8 Gene

Protein Domains for CLDN8 Gene

Suggested Antigen Peptide Sequences for CLDN8 Gene

GenScript: Design optimal peptide antigens:

Graphical View of Domain Structure for InterPro Entry



  • Belongs to the claudin family.
  • Belongs to the claudin family.
genes like me logo Genes that share domains with CLDN8: view

Function for CLDN8 Gene

Molecular function for CLDN8 Gene

GENATLAS Biochemistry:
claudin 8,clostridium perfringens enterotoxin receptor,integral membrane protein,claudin family of major structural components of tight junction (TJ) strands,potentially developmentally regulated
UniProtKB/Swiss-Prot Function:
Plays a major role in tight junction-specific obliteration of the intercellular space.

Gene Ontology (GO) - Molecular Function for CLDN8 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005198 structural molecule activity IEA --
GO:0005515 protein binding IPI 25416956
GO:0042802 identical protein binding ISS --
genes like me logo Genes that share ontologies with CLDN8: view

Animal Model Products

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for CLDN8

In Situ Assay Products

Flow Cytometry Products

No data available for Enzyme Numbers (IUBMB) , Phenotypes , Animal Models , miRNA , Transcription Factor Targets and HOMER Transcription for CLDN8 Gene

Localization for CLDN8 Gene

Subcellular locations from UniProtKB/Swiss-Prot for CLDN8 Gene

Cell junction, tight junction. Cell membrane; Multi-pass membrane protein. Note=Localizes to tight junctions in all 3 segments of the epididymis, in the caput found in the lateral margins of principal cells, and in the corpus at the interface between basal and principal cells.

Subcellular locations from

Jensen Localization Image for CLDN8 Gene COMPARTMENTS Subcellular localization image for CLDN8 gene
Compartment Confidence
endoplasmic reticulum 5
plasma membrane 5

Gene Ontology (GO) - Cellular Components for CLDN8 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0005783 endoplasmic reticulum IDA 16780588
GO:0005886 plasma membrane IDA 16780588
GO:0005923 bicellular tight junction ISS --
GO:0016021 integral component of membrane IEA --
GO:0016323 basolateral plasma membrane IEA --
genes like me logo Genes that share ontologies with CLDN8: view

Pathways for CLDN8 Gene

genes like me logo Genes that share pathways with CLDN8: view

PCR Array Products

  • Pathway & Disease-focused RT² Profiler PCR Arrays

Interacting Proteins for CLDN8 Gene

Selected Interacting proteins: P56748-CLD8_HUMAN for CLDN8 Gene via UniProtKB I2D

Gene Ontology (GO) - Biological Process for CLDN8 Gene

GO ID Qualified GO term Evidence PubMed IDs
GO:0016338 calcium-independent cell-cell adhesion via plasma membrane cell-adhesion molecules ISS --
genes like me logo Genes that share ontologies with CLDN8: view

Transcripts for CLDN8 Gene

mRNA/cDNA for CLDN8 Gene

Unigene Clusters for CLDN8 Gene

Claudin 8:
Representative Sequences:

Inhibitory RNA Products

  • Predesigned siRNA for gene silencing in human,mouse,rat for CLDN8

Flow Cytometry Products

Alternative Splicing Database (ASD) splice patterns (SP) for CLDN8 Gene

No ASD Table

Relevant External Links for CLDN8 Gene

GeneLoc Exon Structure for
ECgene alternative splicing isoforms for

Expression for CLDN8 Gene

mRNA expression in normal human tissues for CLDN8 Gene

mRNA expression in embryonic tissues and stem cells from LifeMap Discovery

mRNA differential expression in normal tissues according to GTEx for CLDN8 Gene

This gene is overexpressed in Minor Salivary Gland (8.3), Colon - Transverse (8.3), Breast - Mammary Tissue (7.4), Kidney - Cortex (6.9), and Vagina (5.4).

SOURCE GeneReport for Unigene cluster for CLDN8 Gene Hs.162209

mRNA Expression by UniProt/SwissProt for CLDN8 Gene

Tissue specificity: Expressed in the epididymis, mainly in the caput segment.
genes like me logo Genes that share expressions with CLDN8: view

Primer Products

In Situ Assay Products

No data available for Protein differential expression in normal tissues , Protein expression and Expression partners for CLDN8 Gene

Orthologs for CLDN8 Gene

This gene was present in the common ancestor of chordates.

Orthologs for CLDN8 Gene

Organism Taxonomy Gene Similarity Type Details
(Bos Taurus)
Mammalia CLDN8 35
  • 86.67 (n)
  • 86.67 (a)
CLDN8 36
  • 87 (a)
(Canis familiaris)
Mammalia CLDN8 35
  • 86.37 (n)
  • 84.44 (a)
CLDN8 36
  • 73 (a)
(Mus musculus)
Mammalia Cldn8 35
  • 82.96 (n)
  • 82.67 (a)
Cldn8 16
Cldn8 36
  • 83 (a)
(Pan troglodytes)
Mammalia CLDN8 35
  • 99.7 (n)
  • 99.56 (a)
CLDN8 36
  • 100 (a)
(Rattus norvegicus)
Mammalia Cldn8 35
  • 83.26 (n)
  • 83.11 (a)
(Monodelphis domestica)
Mammalia CLDN8 36
  • 82 (a)
(Gallus gallus)
Aves CLDN8 35
  • 68.45 (n)
  • 65.18 (a)
CLDN8 36
  • 65 (a)
(Anolis carolinensis)
Reptilia CLDN8 36
  • 59 (a)
(Danio rerio)
Actinopterygii zgc:110333 35
  • 57.87 (n)
  • 52.81 (a)
CLDN17 36
  • 30 (a)
Species with no ortholog for CLDN8:
  • 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)
  • platypus (Ornithorhynchus anatinus)
  • 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 CLDN8 Gene

Gene Tree for CLDN8 (if available)
Gene Tree for CLDN8 (if available)

Paralogs for CLDN8 Gene

(18) SIMAP similar genes for CLDN8 Gene using alignment to 1 proteins:

genes like me logo Genes that share paralogs with CLDN8: view

Variants for CLDN8 Gene

Sequence variations from dbSNP and Humsavar for CLDN8 Gene

SNP ID Clin Chr 21 pos Sequence Context AA Info Type MAF
rs685967 - 30,215,541(-) TCATC(A/C/G/T)CGGGC reference, missense
rs686364 - 30,215,475(-) ATAAC(C/T)CAATA missense, reference
rs1557294 - 30,215,853(+) GACAG(C/T)GACAG reference, missense
rs1557295 -- 30,215,987(+) AAGCA(C/G)GGTTC utr-variant-5-prime
rs1557296 -- 30,216,007(+) CAGAA(C/G)AGAAC utr-variant-5-prime

Relevant External Links for CLDN8 Gene

HapMap Linkage Disequilibrium report

No data available for Polymorphic Variants from UniProtKB/Swiss-Prot and Structural Variations from Database of Genomic Variants (DGV) for CLDN8 Gene

Disorders for CLDN8 Gene

(2) University of Copenhagen DISEASES for CLDN8 Gene

(2) Novoseek inferred disease relationships for CLDN8 Gene

Disease -log(P) Hits PubMed IDs
carcinoma renal cell 58.3 7
tumors 0 3

Relevant External Links for CLDN8

Genetic Association Database (GAD)
genes like me logo Genes that share disorders with CLDN8: view

No data available for OMIM , UniProtKB/Swiss-Prot and Genatlas for CLDN8 Gene

Publications for CLDN8 Gene

  1. Cell array-based intracellular localization screening reveals novel functional features of human chromosome 21 proteins. (PMID: 16780588) Hu Y.H. … Janitz M. (BMC Genomics 2006) 3 23
  2. Claudin-7 and claudin-8: immunohistochemical markers for the differential diagnosis of chromophobe renal cell carcinoma and renal oncocytoma. (PMID: 18799195) Osunkoya A.O. … Young A.N. (Hum. Pathol. 2009) 3 23
  3. Na+ absorption defends from paracellular back-leakage by claudin-8 upregulation. (PMID: 19000657) Amasheh S. … Fromm M. (Biochem. Biophys. Res. Commun. 2009) 3 23
  4. Immunohistochemical stain for cytokeratin 7, S100A1 and claudin 8 is valuable in differential diagnosis of chromophobe renal cell carcinoma from renal oncocytoma. (PMID: 19302533) Kim S.S. … Choi C. (Histopathology 2009) 3 23
  5. Differential expression of genes encoding tight junction proteins in colorectal cancer: frequent dysregulation of claudin-1, -8 and -12. (PMID: 17047970) GrAPne J. … Buhr H.J. (Int J Colorectal Dis 2007) 3 23

Products for CLDN8 Gene

Sources for CLDN8 Gene

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