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GENE AND PROTEIN SUMMARY

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Gene name

CLDN3

Description

claudin 3

Protein class

Candidate cancer biomarkers, Mapped to UniProt SWISS-PROT, Potential transmembrane proteins

Protein evidence

High

Entrez gene summary

Tight junctions represent one mode of cell-to-cell adhesion in epithelial or endothelial cell sheets, forming continuous seals around cells and serving as a physical barrier to prevent solutes and water from passing freely through the paracellular space. These junctions are comprised of sets of continuous networking strands in the outwardly facing cytoplasmic leaflet, with complementary grooves in the inwardly facing extracytoplasmic leaflet. The protein encoded by this intronless gene, a member of the claudin family, is an integral membrane protein and a component of tight junction strands. It is also a low-affinity receptor for Clostridium perfringens enterotoxin, and shares aa sequence similarity with a putative apoptosis-related protein found in rat. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

1 in total
1 with predicted TM region
0 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Additional location(s)

 

Staining summary

Protein was not detected.

Reliability (APE)

N/A

Antibodies in assay

CAB002702, HPA007322
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Membranous expression at variable levels in most tissues.

Tissue specificity

Expressed in 51 out of 81 cell types

Reliability (APE)

Medium

Antibodies in assay

CAB002702, HPA007322, HPA014361
 

Organ

No of cell types

Protein expression

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 13
Respiratory (lung) 4
Cardiovascular 1
Female tissues 13
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 13
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 76% of the cancers

Antibodies in assay

CAB002702, HPA007322, HPA014361
 

Tissue

Cancer staining

Protein
expression of
normal tissue

Breast cancer
 
Carcinoid
 
Cervical cancer
 
 
Colorectal cancer
 
 
Endometrial cancer
 
 
Glioma
 
Head and neck cancer
 
 
Liver cancer
 
 
Lung cancer
 
 
Lymphoma
 
 
 

Tissue

Cancer staining

Protein
expression of
normal tissue

Melanoma
 
Ovarian cancer
 
Pancreatic cancer
 
Prostate cancer
 
Renal cancer
 
Skin cancer
 
Stomach cancer
 
 
Testis cancer
 
Thyroid cancer
 
Urothelial cancer
 

Level of antibody staining





Strong
Moderate
Weak
Negative

CELL LINE SUMMARY

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RNA evidence

High
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

CAB002702

HPA007322

HPA014361

CAB002702

HPA007322

A-431 Skin Low
NegativeNegative
A-549 Lung Low
CACO-2 Colon Low

-

HEK 293 Embryonal kidney Low
HeLa Cervix Low
Hep-G2 Liver Low
MCF-7 Pleural effusion High
PC-3 Bone marrow High
RT-4 Urinary bladder Low
U-2 OS Bone Low
NegativeNegative
U-251 MG Brain Not detected
Negative

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

Also mapped to

CAB002702 pAb
HPA007322 pAb
CLDN4 (100%), CLDN6 (97%), CLDN9 (97%)
HPA014361 pAb