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GENE AND PROTEIN SUMMARY

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Gene name

HLA-DQB1

Description

major histocompatibility complex, class II, DQ beta 1

Protein class

Potential transmembrane proteins, Potentially secreted proteins

Protein evidence

Medium

Entrez gene summary

HLA-DQB1 belongs to the HLA class II beta chain paralogs. This class II molecule is a heterodimer consisting of an alpha (DQA) and a beta chain (DQB), both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The beta chain is approximately 26-28 kDa and it contains six exons. Exon 1 encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, exon 4 encodes the transmembrane domain and exon 5 encodes the cytoplasmic tail. Within the DQ molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to four different molecules. Typing for these polymorphisms is routinely done for bone marrow transplantation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2011]

External links

Ensembl, Entrez gene, Antibodypedia

No of splice variants

7 in total
3 with predicted TM region
6 with predicted signal peptide

SUBCELLULAR LOCATION SUMMARY

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Main location(s)

Cytoplasm

Additional location(s)

 

Staining summary

Staining of cytoplasm in A-431 and U-2 OS.

Reliability (Single)

Antibodies in assay

HPA013667
 

NORMAL TISSUE & ORGAN SUMMARY

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Staining summary

Lymphoid tissues, macrophages, microglia in brain and Langerhans cells in skin displayed strong immunoreactivity. Normal tissues in general showed weak to moderate cytoplasmic positivity. Most squamous epithelia, the liver, testis, smooth and skeletal muscle were negative.

Tissue specificity

Staining in 49 out of 81 cell types

Reliability (Single)

Antibodies in assay

HPA013667
 

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 2
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 46% of the cancers

Antibodies in assay

HPA013667
 

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

Medium
 

Cell line

Cell origin

RNA abundance

IH staining

IF intensity

HPA013667

HPA013667

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

ANTIBODY SUMMARY

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Antibody

Clonality

Validation

HPA013667 pAb