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GENE AND PROTEIN SUMMARY

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Gene name

KLK2

Description

kallikrein-related peptidase 2

Protein class

Candidate cancer biomarkers, Enzymes, Mapped to UniProt SWISS-PROT, Peptidases, Potential transmembrane proteins, Potentially secreted proteins

Protein evidence

Medium

Entrez gene summary

This gene encodes a member of the grandular kallikrein protein family. Kallikreins are a subgroup of serine proteases that are clustered on chromosome 19. Members of this family are involved in a diverse array of biological functions. The protein encoded by this gene is a highly active trypsin-like serine protease that selectively cleaves at arginine residues. This protein is primarily expressed in prostatic tissue and is responsible for cleaving pro-prostate-specific antigen into its enzymatically active form. This gene is highly expressed in prostate tumor cells and may be a prognostic maker for prostate cancer risk. Alternate splicing results in both coding and non-coding transcript variants. [provided by RefSeq, Jan 2012]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

Nucleus but not nucleoli 

Staining summary

Staining of nuclei and cytoplasm in U-251MG. Staining of cytoplasm in A-431.

Reliability (Single)

Antibodies in assay

HPA000764
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Prostate epithelium displayed strong cytoplasmic immunoreactivity. Other normal tissues were in general negative.

Tissue specificity

Staining in 2 out of 80 cell types

Reliability (Single)

Antibodies in assay

HPA000764
 

Organ

No of cell types

Antibody staining

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 13
Respiratory (lung) 4
Cardiovascular 1
Female tissues 12
Placenta 1
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 14
Endocrine tissues 3

Level of antibody staining





Strong
Moderate
Weak
Negative

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 5% of the cancers

Antibodies in assay

HPA000764
 

Tissue

Cancer staining

Normal tissue
staining

Breast cancer
 
Carcinoid
 
Cervical cancer
 
 
Colorectal cancer
 
 
Endometrial cancer
 
 
Glioma
 
Head and neck cancer
 
 
Liver cancer
 
 
Lung cancer
 
 
Lymphoma
 
 
 

Tissue

Cancer staining

Normal tissue
staining

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

Low
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA000764

HPA000764

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

Also mapped to

HPA000764 pAb
KLK3 (100%)