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GENE AND PROTEIN SUMMARY

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Gene name

PTK2B

Description

PTK2B protein tyrosine kinase 2 beta

Protein class

Enzymes, Kinases, Mapped to UniProt SWISS-PROT

Protein evidence

High

Entrez gene summary

This gene encodes a cytoplasmic protein tyrosine kinase which is involved in calcium-induced regulation of ion channels and activation of the map kinase signaling pathway. The encoded protein may represent an important signaling intermediate between neuropeptide-activated receptors or neurotransmitters that increase calcium flux and the downstream signals that regulate neuronal activity. The encoded protein undergoes rapid tyrosine phosphorylation and activation in response to increases in the intracellular calcium concentration, nicotinic acetylcholine receptor activation, membrane depolarization, or protein kinase C activation. This protein has been shown to bind CRK-associated substrate, nephrocystin, GTPase regulator associated with FAK, and the SH2 domain of GRB2. The encoded protein is a member of the FAK subfamily of protein tyrosine kinases but lacks significant sequence similarity to kinases from other subfamilies. Four transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

12 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, Cytoplasm

Additional location(s)

 

Staining summary

Localized to the nucleus and the cytoplasm.

Reliability (APE)

High

Antibodies in assay

CAB003850, HPA026091, HPA026276
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic and/or nuclear expression at variable levels in most cell types.

Tissue specificity

Expressed in 49 out of 80 cell types

Reliability (APE)

Medium

Antibodies in assay

CAB003850, HPA026091, HPA026276
 

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 12
Placenta 1
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

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Staining summary

Antibody staining in 43% of the cancers

Antibodies in assay

CAB003850, HPA026091, HPA026276
 

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

Medium
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

CAB003850

HPA026091

HPA026276

CAB003850

HPA026091

HPA026276

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB003850 mAb
HPA026276 pAb
HPA026091 pAb