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GENE AND PROTEIN SUMMARY

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Gene name

PPP2R4

Description

protein phosphatase 2A activator, regulatory subunit 4

Protein class

Enzymes, Mapped to UniProt SWISS-PROT, Potential transmembrane proteins

Protein evidence

High

Entrez gene summary

Protein phosphatase 2A is one of the four major Ser/Thr phosphatases and is implicated in the negative control of cell growth and division. Protein phosphatase 2A holoenzymes are heterotrimeric proteins composed of a structural subunit A, a catalytic subunit C, and a regulatory subunit B. The regulatory subunit is encoded by a diverse set of genes that have been grouped into the B/PR55, B'/PR61, and B''/PR72 families. These different regulatory subunits confer distinct enzymatic specificities and intracellular localizations to the holozenzyme. The product of this gene belongs to the B' family. This gene encodes a specific phosphotyrosyl phosphatase activator of the dimeric form of protein phosphatase 2A. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

27 in total
0 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)

 

Staining summary

Mainly localized to the nucleus but excluded from nucleoli.

Reliability (APE)

High

Antibodies in assay

HPA005695, CAB022068, CAB035999
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic and nuclear expression in most cells.

Tissue specificity

Expressed in 57 out of 83 cell types

Reliability (APE)

Medium

Antibodies in assay

HPA005695, CAB022068, CAB035999
 

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 15
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

HPA005695, CAB022068, CAB035999
 

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

HPA005695

CAB022068

HPA005695

CAB022068

CAB035999

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA005695 pAb
CAB022068 mAb
CAB035999 mAb