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GENE AND PROTEIN SUMMARY

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Gene name

SSR1

Description

signal sequence receptor, alpha

Protein class

Mapped to UniProt SWISS-PROT, Potential transmembrane proteins, Potentially secreted proteins

Protein evidence

High

Entrez gene summary

The signal sequence receptor (SSR) is a glycosylated endoplasmic reticulum (ER) membrane receptor associated with protein translocation across the ER membrane. The SSR consists of 2 subunits, a 34-kD glycoprotein encoded by this gene and a 22-kD glycoprotein. This gene generates several mRNA species as a result of complex alternative polyadenylation. This gene is unusual in that it utilizes arrays of polyA signal sequences that are mostly non-canonical. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

8 in total
8 with predicted TM region
7 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Endoplasmic reticulum

Additional location(s)

 

Staining summary

Staining of endoplasmic reticulum in U-251 MG and U-2 OS.

Reliability (Single)

Antibodies in assay

HPA011276
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic expression in most tissues. High expression in exocrine pancreas.

Tissue specificity

Expressed in 57 out of 82 cell types

Reliability (APE)

Medium

Antibodies in assay

HPA011276, HPA017062
 

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 76% of the cancers

Antibodies in assay

HPA011276, HPA017062
 

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

HPA011276

HPA017062

HPA011276

A-431 Skin High
A-549 Lung High
CACO-2 Colon High
HEK 293 Embryonal kidney High
HeLa Cervix High
Hep-G2 Liver High
MCF-7 Pleural effusion High
PC-3 Bone marrow High
RT-4 Urinary bladder High
U-2 OS Bone High
Moderate
U-251 MG Brain High
Weak

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA011276 pAb
HPA017062 pAb