Protein: CD19
B-lymphocyte antigen CD19 (B-lymphocyte surface antigen B4) (Differentiation antigen CD19) (T-cell surface antigen Leu-12) (CD antigen CD19)

Gene: CD19
Organism: Homo sapiens
Interactions: 27
UniProt ID: P15391

Gene Ontology (top 5):
GO:0001923 - B-1 B cell differentiation
GO:0002322 - B cell proliferation involved in immune response
GO:0005886 - plasma membrane
GO:0009897 - external side of plasma membrane
GO:0016064 - immunoglobulin mediated immune response

Download interactions: TXT   MITAB-2.5

Interaction Interactor Experiments Homologs Category Interaction
Score
Confidence

583959

VAV
Proto-oncogene vav

3

3

Small-scale

0.664

High

583970

CD81
CD81 antigen

3

2

Small-scale

0.640

High

583979

B3GN3
N-acetyllactosaminide beta-1,3-N-acetylglucosaminyltransferase 3

3

0

High-throughput

0.638

High

583965

P85A
Phosphatidylinositol 3-kinase regulatory subunit alpha

2

2

Small-scale

0.619

High

583976

IGSF8
Immunoglobulin superfamily member 8

2

0

High-throughput

0.602

High

583964

CD82
CD82 antigen

2

2

Small-scale

0.584

High

583962

CD22
B-cell receptor CD22

2

0

Small-scale

0.576

High

583963

CD9
CD9 antigen

2

2

Small-scale

0.571

High

463313

LYN
Tyrosine-protein kinase Lyn

1

2

Small-scale

0.561

High

583969

VAV2
Guanine nucleotide exchange factor VAV2

1

3

Small-scale

0.561

High

583961

CR2
Complement receptor type 2

2

0

Small-scale

0.559

High

583971

GRB2
Growth factor receptor-bound protein 2

1

3

Small-scale

0.501

High

583960

PLCG2
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase gamma-2

1

0

Small-scale

0.480

High

549730

CD79A
B-cell antigen receptor complex-associated protein alpha chain

1

1

Small-scale

0.479

High

583967

CD79B
B-cell antigen receptor complex-associated protein beta chain

1

1

Small-scale

0.479

High

560297

IFM1
Interferon-induced transmembrane protein 1

1

0

Small-scale

0.458

High

583966

PTN6
Tyrosine-protein phosphatase non-receptor type 6

1

0

Small-scale

0.458

High

583968

KSYK
Tyrosine-protein kinase SYK

1

0

Small-scale

0.458

High

583972

BTK
Tyrosine-protein kinase BTK

1

2

Small-scale

0.445

High

583978

ECT2
Protein ECT2

1

2

High-throughput

0.439

High

583975

P55G
Phosphatidylinositol 3-kinase regulatory subunit gamma

1

6

Small-scale

0.437

High

379487

IGHM
Immunoglobulin heavy constant mu

1

0

Small-scale

0.426

High

583977

MINY3
Ubiquitin carboxyl-terminal hydrolase MINDY-3

3

0

High-throughput

0.347

High

583973

GL1AD
DNA-directed RNA polymerase II subunit GRINL1A, isoforms 4/5

3

0

High-throughput

0.334

High

583974

ANR16
Ankyrin repeat domain-containing protein 16

1

0

High-throughput

0.279

Low

505935

MYZAP
Myocardial zonula adherens protein

1

0

High-throughput

0.232

Low

505992

GRL1A
DNA-directed RNA polymerase II subunit GRINL1A

1

0

High-throughput

0.232

Low


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Last updated: 11Aug2025