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GENE AND PROTEIN SUMMARY

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Gene name

BAI1

Description

brain-specific angiogenesis inhibitor 1

Protein class

Candidate cancer biomarkers, G-protein coupled receptors, Mapped to UniProt SWISS-PROT, Potential transmembrane proteins, Potentially secreted proteins

Protein evidence

Medium

Entrez gene summary

Angiogenesis is controlled by a local balance between stimulators and inhibitors of new vessel growth and is suppressed under normal physiologic conditions. Angiogenesis has been shown to be essential for growth and metastasis of solid tumors. In order to obtain blood supply for their growth, tumor cells are potently angiogenic and attract new vessels as results of increased secretion of inducers and decreased production of endogenous negative regulators. BAI1 contains at least one 'functional' p53-binding site within an intron, and its expression has been shown to be induced by wildtype p53. There are two other brain-specific angiogenesis inhibitor genes, designated BAI2 and BAI3 which along with BAI1 have similar tissue specificities and structures, however only BAI1 is transcriptionally regulated by p53. BAI1 is postulated to be a member of the secretin receptor family, an inhibitor of angiogenesis and a growth suppressor of glioblastomas [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

3 in total
3 with predicted TM region
3 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nuclear membrane, Vesicles

Additional location(s)

 

Staining summary

Staining of the nuclear membrane and/or vesicles in all three cell lines.

Reliability (Single)

Antibodies in assay

HPA038785
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Weak to moderate cytoplasmic positivity was observed in a majority of normal tissues. Small intestine, exocrine pancreas and neuropil were strongly stained. Glial cells, bile duct, alveolar cells, lymphoid tissue and squamous epithelia were negative.

Tissue specificity

Staining in 44 out of 80 cell types

Reliability (Single)

Antibodies in assay

HPA038785
 

Organ

No of cell types

Antibody staining

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 antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 59% of the cancers

Antibodies in assay

HPA038785
 

Tissue

Cancer staining

Normal tissue
staining

Breast cancer
 
Carcinoid
 
Cervical cancer
 
 
Colorectal cancer
 
 
Endometrial cancer
 
 
Glioma
 
Head and neck cancer
 
 
Liver cancer
 
 
Lung cancer
 
 
Lymphoma
 
 
 

Tissue

Cancer staining

Normal tissue
staining

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

 

HPA038785

A-431 Skin Not detected

-

Weak
A-549 Lung Low

-

CACO-2 Colon Not detected

-

HEK 293 Embryonal kidney Low

-

HeLa Cervix Not detected

-

Hep-G2 Liver Not detected

-

MCF-7 Pleural effusion Low

-

PC-3 Bone marrow Not detected

-

RT-4 Urinary bladder Not detected

-

U-2 OS Bone Medium

-

Weak
U-251 MG Brain Not detected

-

Weak

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA038785 pAb