Gene Set: BIOCARTA_CTLA4_PATHWAY

Standard name BIOCARTA_CTLA4_PATHWAY
Systematic name M1467
Brief description The Co-Stimulatory Signal During T-cell Activation
Full description or abstract For a T cell to be activated by a specific antigen, the T cell receptor must recognize complexes of MHCI with the antigen on the surface of an antigen-presenting cell. T cells and the T cell receptor complex do not respond to antigen in solution, but even for the specific antigen they only respond to antigen-MHC-1 complexes on the cell surface. This interaction is necessary for T cell activation, but it is not sufficient. T cell activation also requires a co-stimulatory signal involving interaction of CD28 on the T cell with CD80 or CD86 (B7 family genes) on the antigen-presenting cell. CD28 activates a signal transduction pathway acting through PI-3K, Lck and Grb-2/ITK to provide its co-stimulatory signal for T cell activation. Another means to control T cell activation is by expressing factors that down-regulate T cell activation. Signaling by activated T cell receptors induces expression of CTLA-4, a receptor that opposes T cell activation. CTLA-4 has a higher affinity than CD28 for B7 proteins, terminating T cell activation. ICOS is a protein related to CD28 that is only expressed on activated T cells, and that provides another important co-stimulatory signal. The requirement for co-stimulatory signals provides additional control mechanisms that prevent inappropriate and hazardous T cell activation.
Collection C2: curated gene sets
      CP: canonical pathways
            CP:BIOCARTA: BioCarta gene sets
Source publication  
Exact source  
Related gene sets  
External links http://www.biocarta.com/pathfiles/h_ctla4Pathway.asp
http://www.biocarta.com/pathfiles/PathwayProteinList.asp?showPFID=160
Organism Homo sapiens
Contributed by BioCarta
Source platform EntrezGeneIds
Dataset references  
Download gene set format: grp | text | gmt | gmx | xml
Compute overlaps C1: positional gene sets
C2: curated gene sets
      CGP: chemical and genetic perturbations
      CP: canonical pathways
            CP:BIOCARTA: BioCarta gene sets
            CP:KEGG: KEGG gene sets
            CP:REACTOME: Reactome gene sets
C3: motif gene sets
      MIR: microRNA targets
      TFT: transcription factor targets
C4: computational gene sets
      CGN: cancer gene neighborhoods
      CM: cancer modules
C5: GO gene sets
      BP: GO biological process
      CC: GO cellular component
      MF: GO molecular function
Compendia expression profiles Human tissue compendium (Novartis)
Global Cancer Map (Broad Institute)
NCI-60 cell lines (National Cancer Institute)
Advanced query Further investigate these 21 genes
Gene families Categorize these 21 genes by gene family
Show members (show 21 members mapped to 21 genes)
Version history