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GENE AND PROTEIN SUMMARY

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Gene name

CCNE1

Description

cyclin E1

Protein class

Candidate cancer biomarkers, Mapped to UniProt SWISS-PROT, Potential transmembrane proteins

Protein evidence

High

Entrez gene summary

The protein encoded by this gene belongs to the highly conserved cyclin family, whose members are characterized by a dramatic periodicity in protein abundance through the cell cycle. Cyclins function as regulators of CDK kinases. Different cyclins exhibit distinct expression and degradation patterns which contribute to the temporal coordination of each mitotic event. This cyclin forms a complex with and functions as a regulatory subunit of CDK2, whose activity is required for cell cycle G1/S transition. This protein accumulates at the G1-S phase boundary and is degraded as cells progress through S phase. Overexpression of this gene has been observed in many tumors, which results in chromosome instability, and thus may contribute to tumorigenesis. This protein was found to associate with, and be involved in, the phosphorylation of NPAT protein (nuclear protein mapped to the ATM locus), which participates in cell-cycle regulated histone gene expression and plays a critical role in promoting cell-cycle progression in the absence of pRB. Two alternatively spliced transcript variants of this gene, which encode distinct isoforms, have been described. Two additional splice variants were reported but detailed nucleotide sequence information is not yet available. [provided by RefSeq, Jul 2008]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

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

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Nucleus but not nucleoli

Additional location(s)

 

Staining summary

Localized to the nucleus.

Reliability (APE)

High

Antibodies in assay

CAB000308, CAB016682, HPA018169
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Nuclear and cytoplasmic expression with varying intensity in most tissues. Highest expression in testis and placenta.

Tissue specificity

Expressed in 76 out of 82 cell types

Reliability (APE)

Low

Antibodies in assay

CAB000308, CAB016682, HPA018169
 

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 71% of the cancers

Antibodies in assay

CAB000308, CAB016682, HPA018169
 

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

CAB000308

CAB016682

CAB000308

CAB016682

HPA018169

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB000308 mAb
CAB016682 pAb
HPA018169 pAb