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GENE AND PROTEIN SUMMARY

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Gene name

SIGMAR1

Description

sigma non-opioid intracellular receptor 1

Protein class

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

Protein evidence

High

Entrez gene summary

This gene encodes a receptor protein that interacts with a variety of psychotomimetic drugs, including cocaine and amphetamines. The receptor is believed to play an important role in the cellular functions of various tissues associated with the endocrine, immune, and nervous systems. As indicated by its previous name, opioid receptor sigma 1 (OPRS1), the product of this gene was erroneously thought to function as an opioid receptor; it is now thought to be a non-opioid receptor. Alternative splicing of this gene results in transcript variants encoding distinct isoforms. [provided by RefSeq, Dec 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

4 in total
3 with predicted TM region
1 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

 

Staining summary

Localized to the cytoplasm.

Reliability (APE)

Very low

Antibodies in assay

CAB013470, HPA018002, HPA024071
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic expression in most tissues with highest levels in glandular cells.

Tissue specificity

Expressed in 61 out of 82 cell types

Reliability (APE)

Medium

Antibodies in assay

CAB013470, HPA018002, HPA024071
 

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 72% of the cancers

Antibodies in assay

CAB013470, HPA018002, HPA024071
 

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

CAB013470

HPA024071

CAB013470

HPA018002

HPA024071

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB013470 pAb
HPA018002 pAb
HPA024071 pAb