Protein: 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)

Gene: CD9
Organism: Homo sapiens
Interactions: 142
UniProt ID: P21926

Gene Ontology (top 5):
GO:0005178 - integrin binding
GO:0005615 - extracellular space
GO:0005886 - plasma membrane
GO:0005925 - focal adhesion
GO:0007155 - cell adhesion

Download interactions: TXT   MITAB-2.5

Interaction Interactor Experiments Homologs Category Interaction
Score
Confidence

641987

FPRP
Prostaglandin F2 receptor negative regulator

7

20

Small-scale

0.965

High

641970

IGSF8
Immunoglobulin superfamily member 8

7

20

Small-scale

0.962

High

641932

CD81
CD81 antigen

6

19

Small-scale

0.932

High

160995

ADA10
Disintegrin and metalloproteinase domain-containing protein 10

3

20

Small-scale

0.830

High

477403

CD63
CD63 antigen

3

19

Small-scale

0.817

High

641915

CD82
CD82 antigen

2

19

Small-scale

0.737

High

298986

TSN9
Tetraspanin-9

2

18

Small-scale

0.735

High

641923

CD151
CD151 antigen

2

19

Small-scale

0.735

High

641966

TSN14
Tetraspanin-14

2

19

Small-scale

0.735

High

641922

MUC18
Cell surface glycoprotein MUC18

2

13

Small-scale

0.712

High

431707

ITB1
Integrin beta-1

5

19

Small-scale

0.695

High

252555

TSN1
Tetraspanin-1

1

17

High-throughput

0.691

High

252583

TSN2
Tetraspanin-2

1

19

High-throughput

0.691

High

641912

ITA3
Integrin alpha-3

3

20

Small-scale

0.643

High

269835

IGSF3
Immunoglobulin superfamily member 3

1

20

High-throughput

0.625

High

349374

TSN15
Tetraspanin-15

1

16

High-throughput

0.625

High

641927

BCAM
Basal cell adhesion molecule

1

15

High-throughput

0.625

High

641933

TSN5
Tetraspanin-5

1

20

High-throughput

0.625

High

165164

TSN4
Tetraspanin-4

1

18

Small-scale

0.618

High

622026

CD53
Leukocyte surface antigen CD53

1

19

Small-scale

0.618

High

591222

CD44
CD44 antigen

2

4

Small-scale

0.588

High

584666

MCP
Membrane cofactor protein

2

4

Small-scale

0.584

High

641957

ODFP4
Outer dense fiber protein 4

2

0

High-throughput

0.580

High

641909

CD9
CD9 antigen

1

19

High-throughput

0.575

High

641934

CXAR
Coxsackievirus and adenovirus receptor

1

11

High-throughput

0.575

High

641959

CD276
CD276 antigen

1

7

High-throughput

0.575

High

641967

HAVR2
Hepatitis A virus cellular receptor 2

1

1

High-throughput

0.575

High

641982

NECT3
Nectin-3

1

12

High-throughput

0.575

High

473661

ITA5
Integrin alpha-5

2

20

Small-scale

0.571

High

583963

CD19
B-lymphocyte antigen CD19

2

2

Small-scale

0.571

High

641940

MP2K1
Dual specificity mitogen-activated protein kinase kinase 1

2

1

High-throughput

0.571

High

641949

CD166
CD166 antigen

2

16

Small-scale

0.571

High

390461

TFR1
Transferrin receptor protein 1

2

8

Small-scale

0.570

High

467372

4F2
Amino acid transporter heavy chain SLC3A2

2

4

Small-scale

0.570

High

641910

ITA6
Integrin alpha-6

2

20

Small-scale

0.570

High

641937

ADA17
Disintegrin and metalloproteinase domain-containing protein 17

2

20

Small-scale

0.570

High

458278

ADRB2
Beta-2 adrenergic receptor

1

9

Small-scale

0.552

High

641969

CTL1
Choline transporter-like protein 1

2

4

Small-scale

0.552

High

641971

SPSB4
SPRY domain-containing SOCS box protein 4

2

5

High-throughput

0.549

High

373771

RASN
GTPase NRas

1

7

High-throughput

0.536

High

480700

LEG1
Galectin-1

1

8

High-throughput

0.536

High

602734

AATC
Aspartate aminotransferase, cytoplasmic

1

1

High-throughput

0.536

High

641968

IGDC4
Immunoglobulin superfamily DCC subclass member 4

1

10

High-throughput

0.536

High

641976

TX101
Testis-expressed protein 101

1

2

High-throughput

0.536

High

183909

S22A2
Solute carrier family 22 member 2

1

6

Small-scale

0.527

High

607903

ACHB2
Neuronal acetylcholine receptor subunit beta-2

1

0

High-throughput

0.513

High

641975

SRRT
Serrate RNA effector molecule homolog

1

0

High-throughput

0.513

High

470257

NEP
Neprilysin

1

8

Small-scale

0.500

High

641950

IL16
Pro-interleukin-16 [Cleaved into: Interleukin-16

1

2

Small-scale

0.494

High

338584

AGRL2
Adhesion G protein-coupled receptor L2

1

13

High-throughput

0.484

High

420360

AT1A1
Sodium/potassium-transporting ATPase subunit alpha-1

1

9

High-throughput

0.484

High

420766

AT1B1
Sodium/potassium-transporting ATPase subunit beta-1

1

7

High-throughput

0.484

High

484051

PGFRB
Platelet-derived growth factor receptor beta

1

6

High-throughput

0.484

High

603746

ITA2
Integrin alpha-2

1

20

High-throughput

0.484

High

641920

MOT8
Monocarboxylate transporter 8

1

8

High-throughput

0.484

High

641925

MMP14
Matrix metalloproteinase-14

1

1

High-throughput

0.484

High

641929

AT1B3
Sodium/potassium-transporting ATPase subunit beta-3

1

7

High-throughput

0.484

High

641945

STX4
Syntaxin-4

1

11

High-throughput

0.484

High

641947

STX3
Syntaxin-3

1

11

High-throughput

0.484

High

641951

DAG1
Dystroglycan 1

1

4

High-throughput

0.484

High

641965

DGLB
Diacylglycerol lipase-beta

1

3

High-throughput

0.484

High

641983

TEN2
Teneurin-2

1

7

High-throughput

0.484

High

641986

TEN3
Teneurin-3

1

7

High-throughput

0.484

High

184005

S22A1
Solute carrier family 22 member 1

1

6

Small-scale

0.481

High

136182

LST1
Leukocyte-specific transcript 1 protein

1

1

Small-scale

0.479

High

140143

SDCB1
Syntenin-1

1

1

Small-scale

0.479

High

360172

GSHR
Glutathione reductase, mitochondrial

1

1

High-throughput

0.479

High

374400

RASH
GTPase HRas

1

6

Small-scale

0.479

High

428290

RLA2
Large ribosomal subunit protein P2

1

1

High-throughput

0.479

High

532047

KIT
Mast/stem cell growth factor receptor Kit

1

6

Small-scale

0.479

High

583056

VATB1
V-type proton ATPase subunit B, kidney isoform

1

1

High-throughput

0.479

High

598579

CD36
Platelet glycoprotein 4

1

4

Small-scale

0.479

High

603162

KPCA
Protein kinase C alpha type

1

3

Small-scale

0.479

High

616717

SDC1
Syndecan-1

1

3

Small-scale

0.479

High

641926

SERPH
Serpin H1

1

6

Small-scale

0.479

High

641943

LG3BP
Galectin-3-binding protein

1

4

Small-scale

0.479

High

641964

RHG18
Rho GTPase-activating protein 18

1

1

High-throughput

0.479

High

641973

TS101
Tumor susceptibility gene 101 protein

1

1

Small-scale

0.479

High

641977

ACE2
Angiotensin-converting enzyme 2

1

1

Small-scale

0.479

High

641989

CLN8
Protein CLN8

1

0

Small-scale

0.460

High

221834

CHM2A
Charged multivesicular body protein 2a

1

0

High-throughput

0.458

High

641916

PSB4
Proteasome subunit beta type-4

1

0

High-throughput

0.458

High

175322

PLXB2
Plexin-B2

1

2

High-throughput

0.445

High

380521

DRB1
HLA class II histocompatibility antigen, DRB1 beta chain

1

9

Small-scale

0.445

High

466002

ANXA6
Annexin A6

1

5

Small-scale

0.445

High

467233

MDR1
ATP-dependent translocase ABCB1

1

3

High-throughput

0.445

High

522590

PTPRF
Receptor-type tyrosine-protein phosphatase F

1

6

High-throughput

0.445

High

586207

IGLL1
Immunoglobulin lambda-like polypeptide 1

1

2

Small-scale

0.445

High

598687

ANFB
Natriuretic peptides B

1

1

High-throughput

0.445

High

627254

AT2B1
Plasma membrane calcium-transporting ATPase 1

1

14

High-throughput

0.445

High

641911

AT2B4
Plasma membrane calcium-transporting ATPase 4

1

14

High-throughput

0.445

High

641913

STOM
Stomatin

1

3

High-throughput

0.445

High

641917

L1CAM
Neural cell adhesion molecule L1

1

4

High-throughput

0.445

High

641918

STX2
Syntaxin-2

1

11

High-throughput

0.445

High

641921

VATA
V-type proton ATPase catalytic subunit A

1

3

High-throughput

0.445

High

641924

AGRE5
Adhesion G protein-coupled receptor E5

1

12

High-throughput

0.445

High

641930

S12A2
Solute carrier family 12 member 2

1

3

High-throughput

0.445

High

641936

CNTP1
Contactin-associated protein 1

1

4

High-throughput

0.445

High

641938

LAT1
Large neutral amino acids transporter small subunit 1

1

6

High-throughput

0.445

High

641939

DSG1
Desmoglein-1

1

4

High-throughput

0.445

High

641941

ATP7A
Copper-transporting ATPase 1

1

8

High-throughput

0.445

High

641942

ACVR1
Activin receptor type-1

1

4

High-throughput

0.445

High

641952

S39AE
Metal cation symporter ZIP14

1

7

High-throughput

0.445

High

641953

PDIA6
Protein disulfide-isomerase A6

1

2

Small-scale

0.445

High

641954

ERBB4
Receptor tyrosine-protein kinase erbB-4

1

8

High-throughput

0.445

High

641958

SDK2
Protein sidekick-2

1

7

High-throughput

0.445

High

641960

CNNM4
Metal transporter CNNM4

1

4

High-throughput

0.445

High

641963

CTL2
Choline transporter-like protein 2

1

4

High-throughput

0.445

High

641978

F234A
Protein FAM234A

1

1

High-throughput

0.445

High

641979

AT133
Polyamine-transporting ATPase 13A3

1

16

High-throughput

0.445

High

641980

CELR2
Cadherin EGF LAG seven-pass G-type receptor 2

1

3

High-throughput

0.445

High

641984

GPC5B
G-protein coupled receptor family C group 5 member B

1

4

High-throughput

0.445

High

641985

MYOF
Myoferlin

1

5

High-throughput

0.445

High

641988

MRC2
C-type mannose receptor 2

1

8

High-throughput

0.445

High

641990

LCAP
Leucyl-cystinyl aminopeptidase

1

2

High-throughput

0.445

High

641992

PCDB5
Protocadherin beta-5

1

2

High-throughput

0.445

High

641993

AGRG1
Adhesion G-protein coupled receptor G1

1

12

High-throughput

0.445

High

641994

ROBO1
Roundabout homolog 1

1

5

High-throughput

0.445

High

641974

VKOR1
Vitamin K epoxide reductase complex subunit 1

1

6

Small-scale

0.439

High

105334

APRIO
Alternative prion protein

1

2

High-throughput

0.437

High

137960

PSDE
26S proteasome non-ATPase regulatory subunit 14

1

2

High-throughput

0.437

High

612864

EGR1
Early growth response protein 1

1

1

Small-scale

0.437

High

641914

RFA1
Replication protein A 70 kDa DNA-binding subunit

1

1

High-throughput

0.437

High

641935

RNF4
E3 ubiquitin-protein ligase RNF4

1

3

High-throughput

0.437

High

641961

TRI67
Tripartite motif-containing protein 67

1

4

High-throughput

0.437

High

641928

GALK1
Galactokinase

1

0

Small-scale

0.426

High

641956

OCLN
Occludin

1

0

High-throughput

0.426

High

641991

DAAM1
Disheveled-associated activator of morphogenesis 1

1

0

Small-scale

0.426

High

142278

PEX7
Peroxisomal targeting signal 2 receptor

1

1

High-throughput

0.407

High

330040

VENTX
Homeobox protein VENTX

1

3

High-throughput

0.407

High

641931

ECHB
Trifunctional enzyme subunit beta, mitochondrial

1

1

High-throughput

0.407

High

641944

LR74A
Leucine-rich repeat-containing protein 74A

1

1

Small-scale

0.407

High

641946

MK07
Mitogen-activated protein kinase 7

2

0

High-throughput

0.298

High

338053

NSA2
Ribosome biogenesis protein NSA2 homolog

1

0

High-throughput

0.279

Low

641972

FWCH2
FLYWCH family member 2

1

0

High-throughput

0.279

Low

641981

M1IP1
Mid1-interacting protein 1

1

0

High-throughput

0.279

Low

641962

SRGP1
SLIT-ROBO Rho GTPase-activating protein 1

1

0

High-throughput

0.269

Low

587910

RFA2
Replication protein A 32 kDa subunit

1

0

High-throughput

0.249

Low

641919

RFA3
Replication protein A 14 kDa subunit

1

0

High-throughput

0.249

Low

641955

HMGN3
High mobility group nucleosome-binding domain-containing protein 3

1

0

High-throughput

0.249

Low

641948

RM49
Large ribosomal subunit protein mL49

1

0

High-throughput

0.232

Low


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Last updated: 11Aug2025