Protein detail

CD9

CD9 antigen (5H9 antigen) (Cell growth-inhibiting gene 2 protein) (Leukocyte antigen MIC3) (Motility-related protein) (MRP-1) (Tetraspanin-29) (Tspan-29) (p24) (CD antigen CD9)

Entry name CD9	UniProt ID P21926	EVMP confidence score 0.88
Supporting publications (n) 424	Transmembrane count 4	Protein classification Cancer-related genesCD markersPlasma proteinsPredicted membrane proteinsTransporters

EVMP confidence score

Annotation confidence score; open for threshold definitions.

Extremely high >= 0.85High >= 0.70Medium >= 0.55Low >= 0.40

Basic Information13

Protein Names

CD9 antigen (5H9 antigen) (Cell growth-inhibiting gene 2 protein) (Leukocyte antigen MIC3) (Motility-related protein) (MRP-1) (Tetraspanin-29) (Tspan-29) (p24) (CD antigen CD9)

Protein Class (5)

Cancer-related genesCD markersPlasma proteinsPredicted membrane proteinsTransporters

Protein Function (3)

Cancer-related genes:Candidate cancer biomarkers
CD markers
Transporters:Accessory Factors Involved in Transport

Transmembrane

13..33; Helical; 56..76; Helical; 88..111; Helical; 196..221; Helical

Transmembrane Count

Ensembl

ENSG00000010278

Entrez Gene Symbol

CD9

Gene Synonym (5)

BA2MIC3MRP-1P24TSPAN29

Gene Description

CD9 molecule

Chromosome

Position

6199715-6238271

Supporting publications (n)

424

EVMP confidence score

0.88

Fluorescence & Localization1

Function & Pathway7

Protein Function (3)

Cancer-related genes:Candidate cancer biomarkers
CD markers
Transporters:Accessory Factors Involved in Transport

Cellular Component (11)

Page 1 of 2

Molecular Function (2)

Biological Process (3)

KEGG (2)

Reactome (10)

Mediation Categories (4)

Adhesion and uptake mediationClinical-translation mediationFusion and delivery mediationImmune mediation

Relations & Evidence41

Ligand-Receptor Signaling (32)

32 records.

Category	Parent	Database	Transmitter	Receiver	Secreted	Plasma Membrane (Transmembrane)	Plasma Membrane (Peripheral)
cell_adhesion	cell_adhesion	Cellinker	Yes	Yes	Yes	No	No
cell_adhesion	cell_adhesion	Zhong2015	Yes	Yes	Yes	No	No
adhesion	adhesion	OmniPath	Yes	Yes	Yes	No	No
cell_adhesion	cell_adhesion	OmniPath	Yes	Yes	Yes	No	No
transmembrane	transmembrane	UniProt_location	No	No	Yes	No	No
transmembrane	transmembrane	UniProt_topology	No	No	Yes	No	No
transmembrane	transmembrane	UniProt_keyword	No	No	Yes	No	No
transmembrane	transmembrane	TopDB	No	No	Yes	No	No
transmembrane	transmembrane	LOCATE	No	No	Yes	No	No
transmembrane	transmembrane	Ramilowski_location	No	No	Yes	No	No

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Protein Complex Composition (8)

8 records.

Component Gene Symbols	Component UniProt ID	Stoichiometry	Database	Database IDs
ASAP3 CD96 CER1 HSPA1B LDB3	O75112 O95813 P0DMV9 P40200 Q8TDY4	0:0:0:0:0	hu.MAP2
CD96 HSPA1A LDB3	O75112 P0DMV8 P40200	0:0:0	hu.MAP
CD96 HSPA1B LDB3	O75112 P0DMV9 P40200	0:0:0	hu.MAP
AFG2B CD96 HSPA1B LDB3	O75112 P0DMV9 P40200 Q9BVQ7	0:0:0:0	hu.MAP2
CCNB2 CD96 CRHBP NAA20 POGLUT1 SQSTM1 TNIP1	O95067 P24387 P40200 P61599 Q13501 Q15025 Q8NBL1	0:0:0:0:0:0:0	hu.MAP2
CD99	P14209	2	PDB	PDB:7sfx
CD9	P21926	4	PDB	PDB:6z20PDB:6rlrPDB:6rlo
CD93	Q9NPY3	4	PDB	PDB:8ivd

Isolation & Detection Technology (1)

1 record.

EV Isolation Method	Detection Method	Number of References	References
Differential UltracentrifugationSize Exclusion Chromatography	Mass spectrometryWestern blotting	2	37667547 36849061

Sequence, Structure & Domains8

Sequences

Length

228

Mass

25,416

Sequence

MPVKGGTKCIKYLLFGFNFIFWLAGIAVLAIGLWLRFDSQTKSIFEQETNNNNSSFYTGVYILIGAGALMMLVGFLGCCGAVQESQCMLGLFFGFLLVIFAIEIAAAIWGYSHKDEVIKEVQEFYKDTYNKLKTKDEPQRETLKAIHYALNCCGLAGGVEQFISDICPKKDVLETFTVKSCPDAIKEVFDNKFHIIGAVGIGIAVVMIFGMIFSMILCCAIRRNREMV

3D Structural Models

Turn

154..156; 169..172

Helix

5..37; 41..45; 55..82; 86..111; 114..133; 137..139; 140..150; 161..166; 173..175; 181..190; 193..222

3D Structure

X-ray crystallography (5)

Domain & Motif Annotations

Protein Families

Tetraspanin (TM4SF) family

Sequence Similarities

Belongs to the tetraspanin (TM4SF) family.

Clinical Relevance6

Disease Involvement

Cancer-related genes

Drugs (43)

Antibody

CAB002490

Interaction Protein (2)

ENSG00000110651ENSG00000134247

Interaction Count

Interaction Dataset (2)

biogrid_opencellintact_biogrid_opencell

Supporting Publications409

PMID	Title	Abstract
34173219	Adipose-Derived Stem Cell Exosomes Promoted Hair Regeneration.	The existence of exosomes derived from ADSCs was evidenced by CD63, ALX1, and CD9 expression.
34181396	Multifluorescence Single Extracellular Vesicle Analysis by Time-Sequential Illumination and Tracking.	The tetraspanins (CD9, CD63, and CD81) of individual HEK293 EVs analyzed by both NTA and total internal reflection fluorescence microscopy showed that the proposed NTA system can contribute to the understanding of individual extracellular vesicles.
34181894	Placental extracellular vesicles-associated microRNA-519c mediates endotoxin adaptation in pregnancy.	Lipopolysaccharide treatment increased the extracellular vesicles that were positive for the exosome tetraspanin markers, namely CD9, CD63, and CD81, and secreted primarily by trophoblasts.
34212056	Exosomes of adult human fibroblasts cultured on 3D silk fibroin nonwovens intensely stimulate neoangiogenesis.	CD9-expressing total exosome fractions were from conditioned media of 3D-SFnws and 2D polystyrene plates HDF cultures.
34229300	miR-424-5p shuttled by bone marrow stem cells-derived exosomes attenuates osteogenesis via regulating WIF1-mediated Wnt/β-catenin axis.	Firstly, the BMSCs-derived exosomes were isolated, and identified by Western blot with the exosome surface markers CD9, CD81 and CD63.
34258353	Coupling size exclusion chromatography to ultracentrifugation improves detection of exosomal proteins from human plasma by LC-MS.	In the coupled UC + SEC methodology we found 52.25% more proteins enriched in exosomes as CD9, Annexins, YWHAZ (14-3-3 family) and others, than by using UC alone.
34282141	Specificities of exosome versus small ectosome secretion revealed by live intracellular tracking of CD63 and CD9.	By comparative proteomic analysis and differential response to neutralization of endosomal pH, we identify a few surface proteins likely specific of either exosomes (LAMP1) or ectosomes (BSG, SLC3A2).
34284286	Exosomes synergized with PIONs@E6 enhance their immunity against hepatocellular carcinoma via promoting M1 macrophages polarization.	After characterization of PIONs-contained exosomes by TEM, and then the exosomal surface specific molecules CD9 and CD63 were determined by Western Blotting assay. The expression of exosome specific markers CD9 and CD63 was kept at a high level.
34284947	Analysis of extracellular vesicles as a potential index for monitoring differentiation of neural lineage cells from induced pluripotent stem cells.	The EVs expressed the exosome markers CD63, CD81, and CD9.
34366842	The Depolarization-Evoked, Ca2+-Dependent Release of Exosomes From Mouse Cortical Nerve Endings: New Insights Into Synaptic Transmission.	The structural and biochemical analysis unveiled that supernatants contain vesicles that have the size and the shape of exosomes, which were immunopositive for the exosomal markers TSG101, flotillin-1, CD63, and CD9.

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