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  • CD9
PROTEIN SUMMARY GENE INFORMATION RNA DATA ANTIBODY DATA
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

CD9
Synonyms BA2, MIC3, MRP-1, P24, TSPAN29
Gene descriptioni

Full gene name according to HGNC.

CD9 molecule
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Cancer-related genes
CD markers
Plasma proteins
Transporters
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.

  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Membrane
Protein evidence Evidence at protein level (all genes)
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.

Chromosome 12
Cytoband p13.31
Chromosome location (bp) 6199715 - 6238271
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

12
Ensembl ENSG00000010278 (version 109)
Entrez gene 928
HGNC HGNC:1709
UniProt P21926 (UniProt - Evidence at protein level)
neXtProt NX_P21926
GeneCards CD9
Antibodypedia CD9 antibodies


PROTEIN FUNCTION
Protein function (UniProt)i

Useful information about the protein provided by UniProt.

Integral membrane protein associated with integrins, which regulates different processes, such as sperm-egg fusion, platelet activation and aggregation, and cell adhesion 1, 2, 3. Present at the cell surface of oocytes and plays a key role in sperm-egg fusion, possibly by organizing multiprotein complexes and the morphology of the membrane required for the fusion (By similarity). In myoblasts, associates with CD81 and PTGFRN and inhibits myotube fusion during muscle regeneration (By similarity). In macrophages, associates with CD81 and beta-1 and beta-2 integrins, and prevents macrophage fusion into multinucleated giant cells specialized in ingesting complement-opsonized large particles 4. Also prevents the fusion between mononuclear cell progenitors into osteoclasts in charge of bone resorption (By similarity). Acts as a receptor for PSG17 (By similarity). Involved in platelet activation and aggregation 5. Regulates paranodal junction formation (By similarity). Involved in cell adhesion, cell motility and tumor metastasis 6, 7.... show less
Biological process (UniProt)i

Keywords assigned by UniProt to proteins because they are involved in a particular biological process.

Cell adhesion, Fertilization
Gene summary (Entrez)i

Useful information about the gene from Entrez

This gene encodes a member of the transmembrane 4 superfamily, also known as the tetraspanin family. Tetraspanins are cell surface glycoproteins with four transmembrane domains that form multimeric complexes with other cell surface proteins. The encoded protein functions in many cellular processes including differentiation, adhesion, and signal transduction, and expression of this gene plays a critical role in the suppression of cancer cell motility and metastasis. [provided by RefSeq, Jan 2011]... show less
PROTEIN INFORMATIONi

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

The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.

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 length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Splice variant SwissProt TrEMBL Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
CD9-201
ENSP00000009180
ENST00000009180
P21926
[Direct mapping] CD9 antigen
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
Cancer-related genes
   Candidate cancer biomarkers
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005178 [integrin binding]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005886 [plasma membrane]
GO:0005925 [focal adhesion]
GO:0007155 [cell adhesion]
GO:0007338 [single fertilization]
GO:0007342 [fusion of sperm to egg plasma membrane involved in single fertilization]
GO:0008283 [cell population proliferation]
GO:0008285 [negative regulation of cell population proliferation]
GO:0008347 [glial cell migration]
GO:0009897 [external side of plasma membrane]
GO:0009986 [cell surface]
GO:0014905 [myoblast fusion involved in skeletal muscle regeneration]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0030168 [platelet activation]
GO:0030666 [endocytic vesicle membrane]
GO:0030669 [clathrin-coated endocytic vesicle membrane]
GO:0030913 [paranodal junction assembly]
GO:0031092 [platelet alpha granule membrane]
GO:0031623 [receptor internalization]
GO:0032991 [protein-containing complex]
GO:0035036 [sperm-egg recognition]
GO:0070062 [extracellular exosome]
GO:0071404 [cellular response to low-density lipoprotein particle stimulus]
GO:0090331 [negative regulation of platelet aggregation]
GO:1903561 [extracellular vesicle]
GO:1905521 [regulation of macrophage migration]
Show all
228 aa
25.4 kDa
No 4
CD9-202
ENSP00000371955
ENST00000382515
A6NNI4
[Direct mapping] CD9 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
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
159 aa
17.8 kDa
No 2
CD9-203
ENSP00000371958
ENST00000382518
P21926
[Direct mapping] CD9 antigen
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
Cancer-related genes
   Candidate cancer biomarkers
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005178 [integrin binding]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005886 [plasma membrane]
GO:0005925 [focal adhesion]
GO:0007155 [cell adhesion]
GO:0007338 [single fertilization]
GO:0007342 [fusion of sperm to egg plasma membrane involved in single fertilization]
GO:0008347 [glial cell migration]
GO:0014905 [myoblast fusion involved in skeletal muscle regeneration]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0030168 [platelet activation]
GO:0030666 [endocytic vesicle membrane]
GO:0030669 [clathrin-coated endocytic vesicle membrane]
GO:0030913 [paranodal junction assembly]
GO:0031092 [platelet alpha granule membrane]
GO:0031623 [receptor internalization]
GO:0032991 [protein-containing complex]
GO:0035036 [sperm-egg recognition]
GO:0070062 [extracellular exosome]
GO:0071404 [cellular response to low-density lipoprotein particle stimulus]
GO:0090331 [negative regulation of platelet aggregation]
GO:1903561 [extracellular vesicle]
Show all
228 aa
25.4 kDa
No 4
CD9-204
ENSP00000371959
ENST00000382519
G8JLH6
[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)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005576 [extracellular region]
GO:0005886 [plasma membrane]
GO:0007338 [single fertilization]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
251 aa
28.1 kDa
No 4
CD9-206
ENSP00000440985
ENST00000536586
F5GXT1
[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)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005576 [extracellular region]
GO:0005886 [plasma membrane]
GO:0007338 [single fertilization]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
270 aa
29.9 kDa
No 4
CD9-208
ENSP00000496639
ENST00000538834
P21926
[Direct mapping] CD9 antigen
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
Cancer-related genes
   Candidate cancer biomarkers
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005178 [integrin binding]
GO:0005515 [protein binding]
GO:0005576 [extracellular region]
GO:0005615 [extracellular space]
GO:0005886 [plasma membrane]
GO:0005925 [focal adhesion]
GO:0007155 [cell adhesion]
GO:0007338 [single fertilization]
GO:0007342 [fusion of sperm to egg plasma membrane involved in single fertilization]
GO:0008347 [glial cell migration]
GO:0014905 [myoblast fusion involved in skeletal muscle regeneration]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
GO:0030168 [platelet activation]
GO:0030666 [endocytic vesicle membrane]
GO:0030669 [clathrin-coated endocytic vesicle membrane]
GO:0030913 [paranodal junction assembly]
GO:0031092 [platelet alpha granule membrane]
GO:0031623 [receptor internalization]
GO:0032991 [protein-containing complex]
GO:0035036 [sperm-egg recognition]
GO:0070062 [extracellular exosome]
GO:0071404 [cellular response to low-density lipoprotein particle stimulus]
GO:0090331 [negative regulation of platelet aggregation]
GO:1903561 [extracellular vesicle]
Show all
228 aa
25.4 kDa
No 4
CD9-212
ENSP00000478288
ENST00000610354
A0A087WU13
[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
   5TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005576 [extracellular region]
GO:0005886 [plasma membrane]
GO:0007338 [single fertilization]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
255 aa
28.4 kDa
No 5
CD9-213
ENSP00000494858
ENST00000642746
A6NNI4
[Direct mapping] CD9 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
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
159 aa
17.8 kDa
No 2
CD9-215
ENSP00000493732
ENST00000645565
A0A2R8Y478
[Direct mapping] CD9 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
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
159 aa
17.7 kDa
No 2
CD9-216
ENSP00000495090
ENST00000646407
A6NNI4
[Direct mapping] CD9 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
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
159 aa
17.8 kDa
No 2
CD9-218
ENSP00000502917
ENST00000676764
A6NNI4
[Direct mapping] CD9 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
   2TM proteins predicted by MDM
Protein evidence (Ezkurdia et al 2014)
   DeepTMHMM predicted membrane proteins
Show all
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
159 aa
17.8 kDa
No 2
CD9-225
ENSP00000503704
ENST00000679331
A0A7I2V3T7
[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)
   DeepTMHMM predicted membrane proteins
Show all
GO:0005576 [extracellular region]
GO:0005886 [plasma membrane]
GO:0007338 [single fertilization]
GO:0016020 [membrane]
GO:0016021 [integral component of membrane]
Show all
218 aa
24 kDa
No 4

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