Javascript is not enabled on this browser. This site will not work properly without Javascript.
PhosphoSitePlus Homepage Cell Signaling Technology
PhosphoSitePlus
HomeAbout PhosphoSiteUsing PhosphoSiteCuration ProcessContact
NIH-logos NIGMS Logo NIAAA Logo NCI Logo NIH Logo
Protein Page:
CD4 (human)
p Phosphorylation
ac Acetylation
me Methylation
m1 Mono-methylation
m2 Di-methylation
m3 Tri-methylation
ub Ubiquitination
sm Sumoylation
ne Neddylation
gl O-GlcNAc
ga O-GalNAc
pa Palmitoylation
ad Adenylylation
sn S-Nitrosylation
ca Caspase cleavage
sc Succinylation

Overview
CD4 Accessory protein for MHC class-II antigen/T-cell receptor interaction. May regulate T-cell activation. Induces the aggregation of lipid rafts. Associates with LCK. Binds to HIV-1 gp120 and to P4HB/PDI and upon HIV-1 binding to the cell membrane, is part of P4HB/PDI- CD4-CXCR4-gp120 complex. Interacts with HIV-1 Envelope polyprotein gp160 and protein Vpu. Interacts with Human Herpes virus 7 capsid proteins. Interacts with PTK2/FAK1; this interaction requires the presence of HIV-1 gp120. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Cell surface
Cellular Component: T cell receptor complex; endoplasmic reticulum membrane; endoplasmic reticulum lumen; early endosome; integral to membrane; plasma membrane; lipid raft; external side of plasma membrane
Molecular Function: protein binding; enzyme binding; transmembrane receptor activity; protein homodimerization activity; zinc ion binding; extracellular matrix structural constituent; coreceptor activity; receptor activity; glycoprotein binding; protein kinase binding; MHC class II protein binding
Biological Process: maintenance of cellular protein localization; viral reproduction; positive regulation of interleukin-2 biosynthetic process; T cell selection; cytokine production; positive regulation of calcium-mediated signaling; induction by virus of cell-cell fusion in host; defense response to Gram-negative bacterium; signal transduction; T cell receptor signaling pathway; enzyme linked receptor protein signaling pathway; regulation of defense response to virus by virus; positive regulation of peptidyl-tyrosine phosphorylation; cell surface receptor linked signal transduction; positive regulation of protein kinase activity; protein palmitoleylation; T cell costimulation; innate immune response; immune response; entry into host cell; cell adhesion; transmembrane receptor protein tyrosine kinase signaling pathway; regulation of T cell activation; T cell differentiation
Reference #:  P01730 (UniProtKB)
Alt. Names/Synonyms: CD4; CD4 antigen (p55); CD4 molecule; CD4 receptor; CD4mut; T-cell surface antigen T4/Leu-3; T-cell surface glycoprotein CD4
Gene Symbols: CD4
Molecular weight: 51,111 Da
Basal Isoelectric point: 9.6  Predict pI for various phosphorylation states
CST Pathways:  T Cell Receptor Signaling
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
Select Structure to View Below

CD4

Protein Structure Not Found.


STRING  |  Reactome  |  neXtProt  |  Protein Atlas  |  BioGPS  |  Scansite  |  Pfam  |  RCSB PDB  |  Phospho3D  |  Phospho.ELM  |  NetworKIN  |  Source  |  UCSD-Nature  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene  |  InnateDB  |  Ensembl Protein


Sites Implicated In
intracellular localization: S433‑p, S440‑p
protein degradation: S433‑p
receptor internalization, altered: S433‑p

Modification Sites and Domains Show Modification Legend
Click here to view phosphorylation modifications only

Modification Sites in Parent Protein, Orthologs, and Isoforms Show Modification Legend
 

Show Multiple Sequence Alignment


 SS 

SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.


 MS 

MS: The number of records in which this modification site was assigned using ONLY proteomic discovery-mode mass spectrometry.


       human

► Hide Isoforms
 
0 3 - gap
0 1 S67-p KILGNQGsFLtKGPS
0 1 T70-p GNQGsFLtKGPSKLN
3 1 S433-p RRQAERMsQIkRLLs
0 1 K436-ub AERMsQIkRLLsEKK
1 0 S440-p sQIkRLLsEKKTCQC
0 2 K453-ub QCPHRFQkTCSPI__
  CD4 iso2  
S18-p PISSPRVsPFPPPAF
- gap
- gap
S254 RRQAERMSQIKRLLS
K257 AERMSQIKRLLSEKK
S261 SQIKRLLSEKKTCQC
K274 QCPHRFQKTCSPI__
  mouse

 
- gap
- gap
- gap
S432-p QRQAARMsQIKRLLS
K435 AARMsQIKRLLSEKK
S439 sQIKRLLSEKKTCQC
K452 QCPHRMQKSHNLI__
Home  |  Curator Login With enhanced literature mining using Linguamatics I2E I2E Logo Produced by 3rd Millennium  |  Design by Digizyme
©2003-2013 Cell Signaling Technology, Inc.