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GENE AND PROTEIN SUMMARY

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Gene name

HIF1A

Description

hypoxia inducible factor 1, alpha subunit (basic helix-loop-helix transcription factor)

Protein class

Candidate cancer biomarkers, Mapped to UniProt SWISS-PROT, Transcription factors

Protein evidence

High

Entrez gene summary

This gene encodes the alpha subunit of transcription factor hypoxia-inducible factor-1 (HIF-1), which is a heterodimer composed of an alpha and a beta subunit. HIF-1 functions as a master regulator of cellular and systemic homeostatic response to hypoxia by activating transcription of many genes, including those involved in energy metabolism, angiogenesis, apoptosis, and other genes whose protein products increase oxygen delivery or facilitate metabolic adaptation to hypoxia. HIF-1 thus plays an essential role in embryonic vascularization, tumor angiogenesis and pathophysiology of ischemic disease. Alternatively spliced transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jul 2011]

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

Additional location(s)

Nucleoli, Cytoplasm 

Staining summary

Staining of nucleus in all three cell lines. Additional staining of cytoplasm in A-431 and U-2 OS.

Reliability (Single)

Antibodies in assay

HPA001275
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Mainly nuclear expression but cytoplasmic as well in some tissues.

Tissue specificity

Expressed in 64 out of 77 cell types

Reliability (APE)

Medium

Antibodies in assay

HPA001275, CAB017442
 

Organ

No of cell types

Protein expression

CNS (brain) 11
Hematopoietic (blood) 8
Liver and pancreas 5
Digestive (GI-tract) 12
Respiratory (lung) 4
Cardiovascular 1
Female tissues 12
Placenta 2
Male tissues 5
Urinary tract (kidney) 3
Skin and soft tissues 11
Endocrine tissues 3

Level of annotated protein expression





High
Medium
Low
None

CANCER TISSUE SUMMARY

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Staining summary

Antibody staining in 59% of the cancers

Antibodies in assay

HPA001275, CAB017442
 

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

HPA001275

CAB017442

HPA001275

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

CAB017442 mAb
HPA001275 pAb