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GENE AND PROTEIN SUMMARY

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Gene name

C4BPB

Description

complement component 4 binding protein, beta

Protein class

Mapped to UniProt SWISS-PROT, Plasma proteins, Potentially secreted proteins

Protein evidence

Medium

Entrez gene summary

This gene encodes a member of a superfamily of proteins composed predominantly of tandemly arrayed short consensus repeats of approximately 60 amino acids. A single, unique beta-chain encoded by this gene assembles with seven identical alpha-chains into the predominant isoform of C4b-binding protein, a multimeric protein that controls activation of the complement cascade through the classical pathway. C4b-binding protein has a regulatory role in the coagulation system also, mediated through the beta-chain binding of protein S, a vitamin K-dependent protein that serves as a cofactor of activated protein C. The genes encoding both alpha and beta chains are located adjacent to each other on human chromosome 1 in the regulator of complement activation gene cluster. Alternative splicing gives rise to multiple transcript variants. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleus

Additional location(s)

Vesicles 

Staining summary

Staining of nucleus in all three cell lines with additional staining of vesicles in U-2 OS.

Reliability (Single)

Antibodies in assay

HPA051620
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

A majority of normal tissues showed weak to moderate cytoplasmic staining. Respiratory epithelia, salivary gland, squamous epithelia and a subset of cells in liver, seminiferus ducts and prostate displayed strong positivity. The neuronal cells exhibited distinct nuclear membranous staining. Pancreas, glial cells and the lymphoid tissues were negative.

Tissue specificity

Staining in 53 out of 78 cell types

Reliability (Single)

Antibodies in assay

HPA051620
 

Organ

No of cell types

Antibody staining

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 12
Respiratory (lung) 4
Cardiovascular 1
Female tissues 13
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 11
Endocrine tissues 3

Level of antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 35% of the cancers

Antibodies in assay

HPA051620
 

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

High
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA051620

HPA051620

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA051620 pAb