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GENE AND PROTEIN SUMMARY

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Gene name

SPP1

Description

secreted phosphoprotein 1

Protein class

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

Protein evidence

Medium

Entrez gene summary

The protein encoded by this gene is involved in the attachment of osteoclasts to the mineralized bone matrix. The encoded protein is secreted and binds hydroxyapatite with high affinity. The osteoclast vitronectin receptor is found in the cell membrane and may be involved in the binding to this protein. This protein is also a cytokine that upregulates expression of interferon-gamma and interleukin-12. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

 

Staining summary

Staining of cytoplasm in U-2 OS.

Reliability (Single)

Antibodies in assay

CAB002212
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic expression in a subset of tissues, most abundant in renal tubules and gallbladder.

Tissue specificity

Expressed in 26 out of 82 cell types

Reliability (APE)

Low

Antibodies in assay

CAB002212, HPA027541
 

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 63% of the cancers

Antibodies in assay

CAB002212, HPA027541
 

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

CAB002212

HPA027541

CAB002212

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB002212 mAb
HPA027541 pAb