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GENE AND PROTEIN SUMMARY

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Gene name

CTSS

Description

cathepsin S

Protein class

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

Protein evidence

High

Entrez gene summary

The protein encoded by this gene, a member of the peptidase C1 family, is a lysosomal cysteine proteinase that may participate in the degradation of antigenic proteins to peptides for presentation on MHC class II molecules. The encoded protein can function as an elastase over a broad pH range in alveolar macrophages. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Dec 2010]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Vesicles

Additional location(s)

 

Staining summary

Localized to vesicles.

Reliability (APE)

Medium

Antibodies in assay

CAB000460, HPA002988
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Selective granular cytoplasmic expression in many glandular epithelia and subsets of leukocytes.

Tissue specificity

Expressed in 35 out of 81 cell types

Reliability (APE)

Medium

Antibodies in assay

CAB000460, HPA002988
 

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 13
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 40% of the cancers

Antibodies in assay

CAB000460, HPA002988
 

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

Medium
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

CAB000460

HPA002988

CAB000460

HPA002988

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB000460 mAb
HPA002988 pAb