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GENE AND PROTEIN SUMMARY

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Gene name

ERBB2

Description

v-erb-b2 erythroblastic leukemia viral oncogene homolog 2, neuro/glioblastoma derived oncogene homolog (avian)

Protein class

Candidate cancer biomarkers, CD markers, Enzymes, Kinases, Mapped to UniProt SWISS-PROT, Mutated genes in cancer, Plasma proteins, Potential transmembrane proteins

Entrez gene summary

This gene encodes a member of the epidermal growth factor (EGF) receptor family of receptor tyrosine kinases. This protein has no ligand binding domain of its own and therefore cannot bind growth factors. However, it does bind tightly to other ligand-bound EGF receptor family members to form a heterodimer, stabilizing ligand binding and enhancing kinase-mediated activation of downstream signalling pathways, such as those involving mitogen-activated protein kinase and phosphatidylinositol-3 kinase. Allelic variations at amino acid positions 654 and 655 of isoform a (positions 624 and 625 of isoform b) have been reported, with the most common allele, Ile654/Ile655, shown here. Amplification and/or overexpression of this gene has been reported in numerous cancers, including breast and ovarian tumors. Alternative splicing results in several additional transcript variants, some encoding different isoforms and others that have not been fully characterized. [provided by RefSeq, Jul 2008]

No of splice variants

6 in total
5 with predicted TM region
2 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Additional location(s)

 

Staining summary

No staining was observed in any of the three cell lines.

Reliability (Single)

Antibodies in assay

CAB020416
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Expressed in selected normal tissues. Localization to the plasma membrane.

Tissue specificity

Expressed in 11 out of 66 cell types

Reliability (APE)

Medium

Antibodies in assay

CAB000043, HPA001383, CAB020416
 

Organ

No of cell types

Protein expression

CNS (brain) 9
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 11
Respiratory (lung) 4
Cardiovascular 1
Female tissues 11
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 4
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 40% of the cancers

Antibodies in assay

CAB000043, HPA001383, CAB020416
 

Tissue

Cancer staining

Protein
expression of
normal tissue

Breast cancer
 
Cervical cancer
 
 
Colorectal cancer
 
 
Endometrial cancer
 
 
Head and neck cancer
 
 
Liver cancer
 
 
Lung cancer
 
 
Malignant carcinoid
 
Malignant glioma
 
 
 
Malignant lymphoma
 
 
 
 

Tissue

Cancer staining

Protein
expression of
normal tissue

Malignant 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 level category

High
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

CAB000043

HPA001383

CAB020416

CAB020416

A-431 Skin High
Negative
U-2 OS Bone Medium
Negative
U-251 MG Brain Medium
Negative

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB000043 msAb
HPA001383 pAb
CAB020416 mAb