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GENE AND PROTEIN SUMMARY

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Gene name

PBX1

Description

pre-B-cell leukemia homeobox 1

Protein class

Mapped to UniProt SWISS-PROT, Mutated genes in cancer, Potentially secreted proteins, Transcription factors

Protein evidence

High

Entrez gene summary

This gene encodes a nuclear protein that belongs to the PBX homeobox family of transcriptional factors. Studies in mice suggest that this gene may be involved in the regulation of osteogenesis, and required for skeletal patterning and programming. A chromosomal translocation, t(1;19) involving this gene and TCF3/E2A gene, is associated with pre-B-cell acute lymphoblastic leukemia. The resulting fusion protein, in which the DNA binding domain of E2A is replaced by the DNA binding domain of this protein, transforms cells by constitutively activating transcription of genes regulated by the PBX protein family. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2011]

External links

Ensembl, UniProt, Entrez gene, neXtProt, Antibodypedia

No of splice variants

15 in total
0 with predicted TM region
1 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

HPA003505, HPA003881, CAB018768
 

NORMAL TISSUE & ORGAN SUMMARY

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Expression summary

Nuclear expression in most tissues at variable levels.

Tissue specificity

Expressed in 69 out of 81 cell types

Reliability (APE)

Medium

Antibodies in assay

HPA003505, HPA003881, CAB018768
 

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 34% of the cancers

Antibodies in assay

HPA003505, HPA003881, CAB018768
 

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

HPA003505

HPA003881

CAB018768

HPA003505

HPA003881

CAB018768

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

Also mapped to

HPA003505 pAb
CAB018768 mAb
HPA003881 pAb
PBX3 (81%)