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GENE AND PROTEIN SUMMARY

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Gene name

CD55

Description

CD55 molecule, decay accelerating factor for complement (Cromer blood group)

Protein class

Blood group antigen proteins, CD markers, Mapped to UniProt SWISS-PROT, Plasma proteins, Potential transmembrane proteins, Potentially secreted proteins

Protein evidence

High

Entrez gene summary

This gene encodes a protein involved in the regulation of the complement cascade. The encoded glycoprotein is also known as the decay-accelerating factor (DAF); binding of DAF to complement proteins accelerates their decay, disrupting the cascade and preventing damage to host cells. Antigens present on the DAF glycoprotein constitute the Cromer blood group system (CROM). Two alternatively spliced transcripts encoding different proteins have been identified. The predominant transcript encodes a membrane-bound protein expressed on cells exposed to plasma component proteins but an alternatively spliced transcript produces a soluble protein present at much lower levels. Additional, alternatively spliced transcript variants have been described, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleus

Additional location(s)

 

Staining summary

Localized to the nucleus.

Reliability (APE)

Low

Antibodies in assay

HPA002190, CAB010454, HPA024386
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Membranous expression in selected tissues, high expression was observed in trophoblasts and alveolar cells.

Tissue specificity

Expressed in 31 out of 83 cell types

Reliability (APE)

High

Antibodies in assay

HPA002190, CAB010454, HPA024386
 

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 15
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 68% of the cancers

Antibodies in assay

HPA002190, CAB010454, HPA024386
 

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

High
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA002190

CAB010454

HPA024386

HPA002190

CAB010454

HPA024386

A-431 Skin High
ModerateWeakNegative
A-549 Lung High
CACO-2 Colon High
HEK 293 Embryonal kidney Medium
HeLa Cervix High
Hep-G2 Liver Medium

-

MCF-7 Pleural effusion High
PC-3 Bone marrow High
RT-4 Urinary bladder High
U-2 OS Bone High
NegativeNegative
U-251 MG Brain Medium
WeakWeakNegative

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA002190 pAb
CAB010454 pAb
HPA024386 pAb