Fields »

GENE AND PROTEIN SUMMARY

? »

Gene name

KCNA4

Description

potassium voltage-gated channel, shaker-related subfamily, member 4

Protein class

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

Protein evidence

High

Entrez gene summary

Potassium channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. This member contains six membrane-spanning domains with a shaker-type repeat in the fourth segment. It belongs to the A-type potassium current class, the members of which may be important in the regulation of the fast repolarizing phase of action potentials in heart and thus may influence the duration of cardiac action potential.[provided by RefSeq, Mar 2011]

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

? »

Show image »

Main location(s)

Nucleoli

Additional location(s)

Nucleus 

Staining summary

Staining of nucleoli in all three cell lines with additional staining of nucleus in U-251 MG and A-431.

Reliability (Single)

Antibodies in assay

HPA016422
 

NORMAL TISSUE & ORGAN SUMMARY

? »

Show image »

Expression summary

Ubiquitous cytoplasmic expression.

Tissue specificity

Expressed in 62 out of 82 cell types

Reliability (APE)

Low

Antibodies in assay

CAB001977, HPA016422
 

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 14
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

? »

Staining summary

Antibody staining in 79% of the cancers

Antibodies in assay

CAB001977, HPA016422
 

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

? »

RNA evidence

Low
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

CAB001977

HPA016422

A-431 Skin Not detected
Moderate
A-549 Lung Not detected
CACO-2 Colon Not detected
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
Strong
U-251 MG Brain Not detected
Moderate

ANTIBODY SUMMARY

? »

Antibody

Clonality

Validation

CAB001977 mAb
HPA016422 pAb