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GENE AND PROTEIN SUMMARY

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Gene name

KRT8

Description

keratin 8

Protein class

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

Protein evidence

High

Entrez gene summary

This gene is a member of the type II keratin family clustered on the long arm of chromosome 12. Type I and type II keratins heteropolymerize to form intermediate-sized filaments in the cytoplasm of epithelial cells. The product of this gene typically dimerizes with keratin 18 to form an intermediate filament in simple single-layered epithelial cells. This protein plays a role in maintaining cellular structural integrity and also functions in signal transduction and cellular differentiation. Mutations in this gene cause cryptogenic cirrhosis. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2012]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoskeleton (Intermediate filaments)

Additional location(s)

 

Staining summary

Localized to intermediate filaments.

Reliability (APE)

High

Antibodies in assay

CAB000131, HPA049866
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Cytoplasmic and membranous expression in glandular epithelium. Caution: Based on antibodies targeting proteins from multiple genes.

Tissue specificity

Expressed in 30 out of 82 cell types

Reliability (APE)

High

Antibodies in assay

CAB000131, CAB001696, HPA049866
 

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 64% of the cancers

Antibodies in assay

CAB000131, CAB001696, HPA049866
 

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

CAB000131

CAB001696

HPA049866

CAB000131

HPA049866

A-431 Skin High
Weak
A-549 Lung High
CACO-2 Colon High
Strong
HEK 293 Embryonal kidney High

-

HeLa Cervix High
Hep-G2 Liver High
MCF-7 Pleural effusion High
Strong
PC-3 Bone marrow High
RT-4 Urinary bladder High
U-2 OS Bone High
WeakStrong
U-251 MG Brain Medium
Negative

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

Also mapped to

CAB000131 mAb
CAB001696 mAb
HPA049866 pAb
KRT8P11 (85%)