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GENE AND PROTEIN SUMMARY

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Gene name

PRKAB1

Description

protein kinase, AMP-activated, beta 1 non-catalytic subunit

Protein class

Mapped to UniProt SWISS-PROT

Protein evidence

High

Entrez gene summary

The protein encoded by this gene is a regulatory subunit of the AMP-activated protein kinase (AMPK). AMPK is a heterotrimer consisting of an alpha catalytic subunit, and non-catalytic beta and gamma subunits. AMPK is an important energy-sensing enzyme that monitors cellular energy status. In response to cellular metabolic stresses, AMPK is activated, and thus phosphorylates and inactivates acetyl-CoA carboxylase (ACC) and beta-hydroxy beta-methylglutaryl-CoA reductase (HMGCR), key enzymes involved in regulating de novo biosynthesis of fatty acid and cholesterol. This subunit may be a positive regulator of AMPK activity. The myristoylation and phosphorylation of this subunit have been shown to affect the enzyme activity and cellular localization of AMPK. This subunit may also serve as an adaptor molecule mediating the association of the AMPK complex. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

Nucleoli 

Staining summary

Mainly localized to the cytoplasm. In addition localized to the nucleus.

Reliability (APE)

Medium

Antibodies in assay

HPA004247, CAB005058
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Ubiquitous cytoplasmic expression.

Tissue specificity

Expressed in 70 out of 79 cell types

Reliability (APE)

Medium

Antibodies in assay

HPA004247, CAB005058
 

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 1
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 12
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 95% of the cancers

Antibodies in assay

HPA004247, CAB005058
 

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

HPA004247

CAB005058

HPA004247

CAB005058

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA004247 pAb
CAB005058 mAb