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Gene name

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In atlas

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Reliability

Reliability

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Validation

Method

Validation

Method

Validation

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Searches

Tissue

Cell type

Expression

Tissue

Specificity

Cell line

Specificity

Tissue

Detectable

Cell line

Detectable

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Antibodies

Column

 
 
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CD81
  • premium

    TISSUE

  • premium

    CELL

  • CANCER

CANCER ATLAS

GENE/PROTEIN

Antibody validation

Dictionary

Level of antibody staining/expression





High
Medium
Low
Not detected

CANCER ATLASi

The cancer tissue page shows antibody staining in 20 different cancers. The assay and annotation is described here.

This page starts with information about the protein evidence and, when applicable, also protein class. Below the summary, a selection of four standard cancer tissue samples is displayed as representative of the overall staining pattern. From left: colorectal cancer, breast cancer, prostate cancer and lung cancer. An additional 5th image can be added as a complement.

For histological reference, visit the histological dictionary.

Gene description

CD81 molecule

Protein class

CD markers, Disease related genes, Plasma proteins, Potential drug targets, Predicted membrane proteins, Transporters

Protein evidence

Evidence at protein level
Colorectal cancer
Breast cancer
Prostate cancer
Lung cancer
Liver cancer

STAINING SUMMARYi

The cancer tissue summary page shows antibody staining in 20 different cancers. The assay and annotation is described here.

For each cancer, the fraction of samples with antibody staining/protein expression level high, medium, low, or not detected are provided by the blue-scale color-coding (as described by the color-coding scale in the box to the right). The length of the bar represents the number of patient samples analyzed (max=12 patients). The images and annotations can be accessed by clicking on the cancer name or protein expression bar. If more than one antibody is analyzed, the tabs at the top of the staining summary section can be used to toggle between the different antibodies. The tooltip function displays additional data for the features in the staining summary view.

Next to the cancer staining data, the protein expression data of normal tissues or specific cell types corresponding to each cancer are shown and protein expression levels are indicated by the blue-scale color coding.

At the bottom of the page, a summary of the overall protein expression pattern across the analyzed cancer tissues as well as information about literature conformity are presented.

HPA007234
CAB002507

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
 

Staining summary

Most cancers were negative or showed weak cytoplasmic positivity. Several cases of melanoma displayed strong membranous staining.

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
 

Staining summary

Cancer cells were generally weakly stained or negative. Moderate to strong membranous and cytoplasmic immunoreactivity was observed in a few cases of melanoma, ovarian and testicular cancers.

GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Gene name

CD81 (HGNC Symbol)

Synonyms

TAPA-1, TAPA1, TSPAN28

Description

CD81 molecule (HGNC Symbol)

Entrez gene summary

The protein encoded by this gene is a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Most of these members are cell-surface proteins that are characterized by the presence of four hydrophobic domains. The proteins mediate signal transduction events that play a role in the regulation of cell development, activation, growth and motility. This encoded protein is a cell surface glycoprotein that is known to complex with integrins. This protein appears to promote muscle cell fusion and support myotube maintenance. Also it may be involved in signal transduction. This gene is localized in the tumor-suppressor gene region and thus it is a candidate gene for malignancies. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2014]

Chromosome

11

Cytoband

p15.5

Chromosome location (bp)

2376177 - 2397419

Protein evidence

Evidence at protein level (all genes)

Ensembl

ENSG00000110651 (version 83.38)

Entrez gene

975

UniProt

P60033 (UniProt - Evidence at protein level)

neXtProt

NX_P60033

Antibodypedia

CD81 antibodies

PROTEIN BROWSERi

The protein browser displays the antigen location on the target protein(s) and the features of the target protein. The tabs at the top of the protein view section can be used to switch between the different splice variants to which an antigen has been mapped.

At the top of the view, the position of the antigen (identified by the corresponding HPA identifier) is shown as a green bar. A yellow triangle on the bar indicates a <100% sequence identity to the protein target.

Under the antigens, the maximum percent sequence identity of the protein to all other proteins from other human genes is displayed, using a sliding window of 10 aa residues (HsID 10) or 50 aa residues (HsID 50) (read more).

If a signal peptide is predicted by a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius (turquoise) and/or transmembrane regions (orange) are predicted by MDM, these are displayed.

Low complexity regions are shown in yellow and InterPro regions in green. Common (purple) and unique (grey) regions between different splice variants of the gene are also displayed (read more), and at the bottom of the protein view is the protein scale.

«
CD81-001
CD81-002
CD81-003
CD81-004
CD81-005
CD81-006
CD81-007
CD81-012
CD81-013
CD81-014
CD81-015
CD81-017
»

PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The ENSP identifier links to the Ensembl website protein summary, while the ENST identifier links to the Ensembl website transcript summary for the selected splice variant. The data in the UniProt column can be expanded to show links to all matching UniProt identifiers for this protein.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The Gene Ontology terms assigned to this protein are listed if expanding the Gene ontology column. The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide (according to a majority of the signal peptide predictors SPOCTOPUS, SignalP 4.0, and Phobius) and the number of predicted transmembrane region(s) (according to MDM) are also reported.

Splice variant

UniProt

Protein class

Gene ontology

Length & mass

Signal peptide
(predicted)

Transmembrane regions
(predicted)

CD81-001
ENSP00000263645
ENST00000263645
P60033 [Direct mapping]
CD81 antigen
A0A024RCB7 [Target identity:100%; Query identity:100%]
Tetraspanin
Show all
CD markers
Transporters
   Accessory Factors Involved in Transport
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   4TM proteins predicted by MDM
Plasma proteins
Disease related genes
Potential drug targets
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000187 [activation of MAPK activity]
GO:0001772 [immunological synapse]
GO:0005515 [protein binding]
GO:0005886 [plasma membrane]
GO:0005887 [integral component of plasma membrane]
GO:0005925 [focal adhesion]
GO:0007166 [cell surface receptor signaling pathway]
GO:0008104 [protein localization]
GO:0008283 [cell proliferation]
GO:0008284 [positive regulation of cell proliferation]
GO:0009611 [response to wounding]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0016324 [apical plasma membrane]
GO:0023026 [MHC class II protein complex binding]
GO:0030890 [positive regulation of B cell proliferation]
GO:0031647 [regulation of protein stability]
GO:0031982 [vesicle]
GO:0040008 [regulation of growth]
GO:0042127 [regulation of cell proliferation]
GO:0043128 [positive regulation of 1-phosphatidylinositol 4-kinase activity]
GO:0045944 [positive regulation of transcription from RNA polymerase II promoter]
GO:0046718 [viral entry into host cell]
GO:0046813 [receptor-mediated virion attachment to host cell]
GO:0050731 [positive regulation of peptidyl-tyrosine phosphorylation]
GO:0050776 [regulation of immune response]
GO:0061462 [protein localization to lysosome]
GO:0070062 [extracellular exosome]
GO:1904352 [positive regulation of protein catabolic process in the vacuole]
GO:1990459 [transferrin receptor binding]
GO:2000145 [regulation of cell motility]
Show all
236 aa
25.8 kDa
No 4
CD81-002
ENSP00000433178
ENST00000475945
E9PM31 [Direct mapping]
CD81 antigen
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
93 aa
10.1 kDa
No 1
CD81-003
ENSP00000437242
ENST00000492627
E9PJK1 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
165 aa
18 kDa
No 2
CD81-004
ENSP00000432497
ENST00000493525
E9PQV4 [Direct mapping]
CD81 antigen
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   3TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
99 aa
10.7 kDa
No 3
CD81-005
ENSP00000370424
ENST00000381036
A6NMH8 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   4TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
274 aa
29.8 kDa
Yes 4
CD81-006
ENSP00000432249
ENST00000492252
E9PRJ8 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   4TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
209 aa
22.5 kDa
No 4
CD81-007
ENSP00000432033
ENST00000481687
E9PIF1 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   3TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
242 aa
25.9 kDa
No 3
CD81-012
ENSP00000432723
ENST00000530648
E9PPF5 [Direct mapping]
CD81 antigen
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   1TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
52 aa
5.7 kDa
No 1
CD81-013
ENSP00000435633
ENST00000533417
H0YEE2 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   3TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
148 aa
16 kDa
No 3
CD81-014
ENSP00000433767
ENST00000527343
H0YDJ9 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   4TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
225 aa
24.4 kDa
No 4
CD81-015
ENSP00000433904
ENST00000464784
H0YDL9 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   4TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
221 aa
23.7 kDa
No 4
CD81-017
ENSP00000431780
ENST00000526072
E9PJK1 [Direct mapping]
Tetraspanin
Show all
Predicted membrane proteins
   Prediction method-based
   Membrane proteins predicted by MDM
   MEMSAT3 predicted membrane proteins
   MEMSAT-SVM predicted membrane proteins
   Phobius predicted membrane proteins
   SCAMPI predicted membrane proteins
   SPOCTOPUS predicted membrane proteins
   THUMBUP predicted membrane proteins
   TMHMM predicted membrane proteins
   # TM segments-based
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0016021 [integral component of membrane]
Show all
165 aa
18 kDa
No 2

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