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GENE AND PROTEIN SUMMARY

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Gene name

KCNJ3

Description

potassium inwardly-rectifying channel, subfamily J, member 3

Protein class

Mapped to UniProt SWISS-PROT, Potential transmembrane proteins, Transporters, Voltage-gated ion channels

Protein evidence

Medium

Entrez gene summary

Potassium channels are present in most mammalian cells, where they participate in a wide range of physiologic responses. The protein encoded by this gene is an integral membrane protein and inward-rectifier type potassium channel. The encoded protein, which has a greater tendency to allow potassium to flow into a cell rather than out of a cell, is controlled by G-proteins and plays an important role in regulating heartbeat. It associates with three other G-protein-activated potassium channels to form a heteromultimeric pore-forming complex that also couples to neurotransmitter receptors in the brain and whereby channel activation can inhibit action potential firing by hyperpolarizing the plasma membrane. These multimeric G-protein-gated inwardly-rectifying potassium (GIRK) channels may play a role in the pathophysiology of epilepsy, addiction, Down's syndrome, ataxia, and Parkinson's disease. Alternative splicing results in multiple transcript variants encoding distinct proteins. [provided by RefSeq, May 2012]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleoli, Centrosome

Additional location(s)

 

Staining summary

Staining of centrosomes in U-251 MG and A-431, and staining of nucleoli in A-431 and U-2 OS.

Reliability (Single)

Antibodies in assay

HPA024231
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Strong cytoplasmic positivity was observed in granular layer of cerebral cortex. Other normal tissues were in general negative.

Tissue specificity

Staining in 20 out of 79 cell types

Reliability (Single)

Antibodies in assay

HPA024231
 

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 12
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 12
Endocrine tissues 3

Level of antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 4% of the cancers

Antibodies in assay

HPA024231
 

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

HPA024231

HPA024231

A-431 Skin Not detected
Strong
A-549 Lung Not detected
CACO-2 Colon Not detected
HEK 293 Embryonal kidney Not detected
HeLa Cervix Not detected
Hep-G2 Liver Not detected
MCF-7 Pleural effusion Low
PC-3 Bone marrow Not detected
RT-4 Urinary bladder Not detected
U-2 OS Bone Not detected
Strong
U-251 MG Brain Low
Strong

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA024231 pAb