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GENE AND PROTEIN SUMMARY

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Gene name

CGB8

Description

chorionic gonadotropin, beta polypeptide 8

Protein class

Candidate cancer biomarkers, Mapped to UniProt SWISS-PROT, Plasma proteins, Potentially secreted proteins

Protein evidence

High

Entrez gene summary

This gene is a member of the glycoprotein hormone beta chain family and encodes the beta 3 subunit of chorionic gonadotropin (CG). Glycoprotein hormones are heterodimers consisting of a common alpha subunit and an unique beta subunit which confers biological specificity. CG is produced by the trophoblastic cells of the placenta and stimulates the ovaries to synthesize the steroids that are essential for the maintenance of pregnancy. The beta subunit of CG is encoded by 6 genes which are arranged in tandem and inverted pairs on chromosome 19q13.3 and contiguous with the luteinizing hormone beta subunit gene. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

 

Staining summary

Localized to the cytoplasm. Caution: Based on antibodies targeting proteins from multiple genes.

Reliability (APE)

Medium

Antibodies in assay

HPA038925, HPA038934
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Selective cytoplasmic expression in placental trophoblasts. Caution: Based on antibodies targeting proteins from multiple genes.

Tissue specificity

Expressed in 4 out of 82 cell types

Reliability (APE)

Low

Antibodies in assay

HPA038925, HPA038934
 

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 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 7% of the cancers

Antibodies in assay

HPA038925, HPA038934
 

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

HPA038934

HPA038925

HPA038934

A-431 Skin Low
WeakWeak
A-549 Lung Low
CACO-2 Colon Not detected
HEK 293 Embryonal kidney Not detected
HeLa Cervix Not detected
Hep-G2 Liver Not detected
MCF-7 Pleural effusion Not detected
PC-3 Bone marrow Not detected
RT-4 Urinary bladder Not detected
U-2 OS Bone Low
WeakWeak
U-251 MG Brain Medium
Weak

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

Also mapped to

HPA038925 pAb
CGB (100%), CGB1 (100%), CGB2 (100%), CGB5 (100%), CGB7 (100%), CTB-60B18.6 (100%), LHB (88%)
HPA038934 pAb
CGB (100%), CGB1 (100%), CGB2 (97%), CGB5 (100%), CGB7 (97%)