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GENE AND PROTEIN SUMMARY

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Gene name

CCKBR

Description

cholecystokinin B receptor

Protein class

Candidate cancer biomarkers, G-protein coupled receptors, Mapped to UniProt SWISS-PROT, Potential transmembrane proteins

Protein evidence

Medium

Entrez gene summary

This gene encodes a G-protein coupled receptor for gastrin and cholecystokinin (CCK), regulatory peptides of the brain and gastrointestinal tract. This protein is a type B gastrin receptor, which has a high affinity for both sulfated and nonsulfated CCK analogs and is found principally in the central nervous system and the gastrointestinal tract. A misspliced transcript variant including an intron has been observed in cells from colorectal and pancreatic tumors. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

5 in total
4 with predicted TM region
0 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleus but not nucleoli

Additional location(s)

Cytoplasm 

Staining summary

Staining of the nucleus in all three cell lines with additional staining of the cytoplasm in U-251 MG.

Reliability (Single)

Antibodies in assay

HPA041976
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Normal tissues displayed weak to moderate cytoplasmic and occasional nuclear positivity. Stomach, renal tubules, Leydig cells, heart and skeletal muscle were strongly stained. Glial cells, smooth muscle cells and white pulp of spleen were negative.

Tissue specificity

Staining in 65 out of 81 cell types

Reliability (Single)

Antibodies in assay

HPA041976
 

Organ

No of cell types

Antibody staining

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 antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 77% of the cancers

Antibodies in assay

HPA041976
 

Tissue

Cancer staining

Normal tissue
staining

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

Tissue

Cancer staining

Normal tissue
staining

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

Low
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

 

HPA041976

A-431 Skin Not detected

-

Moderate
A-549 Lung Not detected

-

CACO-2 Colon Low

-

HEK 293 Embryonal kidney Low

-

HeLa Cervix Not detected

-

Hep-G2 Liver Not detected

-

MCF-7 Pleural effusion Not detected

-

PC-3 Bone marrow Not detected

-

RT-4 Urinary bladder Not detected

-

U-2 OS Bone Low

-

Moderate
U-251 MG Brain Not detected

-

Weak

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA041976 pAb