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GENE AND PROTEIN SUMMARY

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Gene name

KCNMB3

Description

potassium large conductance calcium-activated channel, subfamily M beta member 3

Protein class

Mapped to UniProt SWISS-PROT, Potential transmembrane proteins, Potentially secreted proteins, Transporters

Protein evidence

High

Entrez gene summary

MaxiK channels are large conductance, voltage and calcium-sensitive potassium channels which are fundamental to the control of smooth muscle tone and neuronal excitability. MaxiK channels can be formed by 2 subunits: the pore-forming alpha subunit and the modulatory beta subunit. The protein encoded by this gene is an auxiliary beta subunit which may partially inactivate or slightly decrease the activation time of MaxiK alpha subunit currents. Alternative splicing results in multiple transcript variants. A related pseudogene has been identified on chromosome 22. [provided by RefSeq, Jul 2009]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleus, Mitochondria

Additional location(s)

 

Staining summary

Staining of nucleus in A-431 and staining of both nucleus and mitochondria in U-2 OS.

Reliability (Single)

Antibodies in assay

HPA019185
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Granular cytoplasmic expression in a few tissues. High expression in glandular cells of the gastrointestinal tract, renal tubuli and Leydig cells in testis.

Tissue specificity

Expressed in 29 out of 80 cell types

Reliability (APE)

Low

Antibodies in assay

HPA015665, HPA019185
 

Organ

No of cell types

Protein expression

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 12
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 62% of the cancers

Antibodies in assay

HPA015665, HPA019185
 

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

Low
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA015665

HPA019185

A-431 Skin Low
Moderate
A-549 Lung Low
CACO-2 Colon Low
HEK 293 Embryonal kidney Low
HeLa Cervix Low
Hep-G2 Liver Low
MCF-7 Pleural effusion Low
PC-3 Bone marrow Low
RT-4 Urinary bladder Low
U-2 OS Bone Low
Moderate
U-251 MG Brain Low
Negative

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA015665 pAb
HPA019185 pAb