Fractalkine (P78423)

Uniprot ID P78423
Protein Name Fractalkine
Gene Name CX3CL1
Species Homo sapiens (Human)
Signal peptide(a) Y Secretome P(b) 0.171
Function Acts as a ligand for both CX3CR1 and integrins. Binds to CX3CR1 (PubMed:23125415, PubMed:9931005, PubMed:21829356). Binds to integrins ITGAV:ITGB3 and ITGA4:ITGB1. Can activate integrins in both a CX3CR1-dependent and CX3CR1-independent manner. In the presence of CX3CR1, activates integrins by binding to the classical ligand-binding site (site 1) in integrins. In the absence of CX3CR1, binds to a second site (site 2) in integrins which is distinct from site 1 and enhances the binding of other integrin ligands to site 1 (PubMed:23125415, PubMed:24789099). The soluble form is chemotactic for T-cells and monocytes and not for neutrophils. The membrane-bound form promotes adhesion of those leukocytes to endothelial cells. May play a role in regulating leukocyte adhesion and migration processes at the endothelium (PubMed:9024663, PubMed:9177350). .
GO - Molecular function
  • CCR chemokine receptor binding : IBA:GO_Central
  • chemoattractant activity : IMP:ARUK-UCL
  • chemokine activity : IDA:UniProtKB
  • CX3C chemokine receptor binding : IDA:UniProtKB
  • CXCR1 chemokine receptor binding : IPI:ARUK-UCL
  • integrin binding : IDA:UniProtKB
  • signaling receptor binding : TAS:UniProtKB
GO - Biological process
  • aging : ISS:ARUK-UCL
  • angiogenesis involved in wound healing : IEA:Ensembl
  • autocrine signaling : ISS:ARUK-UCL
  • cell adhesion : IPI:ARUK-UCL
  • cell chemotaxis : IDA:ARUK-UCL
  • cell-cell adhesion : ISS:ARUK-UCL
  • cell-cell signaling : TAS:ARUK-UCL
  • cellular response to interferon-gamma : IBA:GO_Central
  • cellular response to interleukin-1 : IBA:GO_Central
  • cellular response to tumor necrosis factor : IBA:GO_Central
  • chemokine-mediated signaling pathway : IDA:ARUK-UCL
  • chemotaxis : IDA:UniProtKB
  • cytokine-mediated signaling pathway : TAS:UniProtKB
  • defense response : TAS:UniProtKB
  • eosinophil chemotaxis : IBA:GO_Central
  • G protein-coupled receptor signaling pathway : ISS:ARUK-UCL
  • immune response : TAS:UniProtKB
  • inflammatory response : IBA:GO_Central
  • integrin activation : IMP:UniProtKB
  • leukocyte adhesive activation : TAS:UniProtKB
  • leukocyte chemotaxis : TAS:UniProtKB
  • leukocyte migration involved in inflammatory response : IMP:UniProtKB
  • lymphocyte chemotaxis : IBA:GO_Central
  • macrophage chemotaxis : IEA:Ensembl
  • microglial cell activation : ISS:ARUK-UCL
  • microglial cell proliferation : IMP:ARUK-UCL
  • monocyte chemotaxis : IBA:GO_Central
  • negative regulation of apoptotic process : IMP:ARUK-UCL
  • negative regulation of apoptotic signaling pathway : IGI:ARUK-UCL
  • negative regulation of cell migration : IDA:BHF-UCL
  • negative regulation of cell-substrate adhesion : NAS:ARUK-UCL
  • negative regulation of extrinsic apoptotic signaling pathway in absence of ligand : IEA:Ensembl
  • negative regulation of glutamate receptor signaling pathway : ISS:ARUK-UCL
  • negative regulation of hippocampal neuron apoptotic process : IGI:ARUK-UCL
  • negative regulation of interleukin-1 alpha production : ISS:ARUK-UCL
  • negative regulation of interleukin-1 beta production : TAS:ARUK-UCL
  • negative regulation of interleukin-6 production : TAS:ARUK-UCL
  • negative regulation of microglial cell activation : ISS:ARUK-UCL
  • negative regulation of neuron migration : TAS:ARUK-UCL
  • negative regulation of tumor necrosis factor production : TAS:ARUK-UCL
  • negative regulation of tumor necrosis factor secretion : IDA:ARUK-UCL
  • neuron cellular homeostasis : ISS:ARUK-UCL
  • neuron remodeling : TAS:ARUK-UCL
  • neutrophil chemotaxis : IBA:GO_Central
  • positive chemotaxis : IMP:ARUK-UCL
  • positive regulation of actin filament bundle assembly : IGI:ARUK-UCL
  • positive regulation of angiogenesis : IEA:Ensembl
  • positive regulation of calcium-independent cell-cell adhesion : IDA:UniProtKB
  • positive regulation of cell population proliferation : IMP:ARUK-UCL
  • positive regulation of cell-matrix adhesion : TAS:ARUK-UCL
  • positive regulation of ERK1 and ERK2 cascade : IBA:GO_Central
  • positive regulation of GTPase activity : IBA:GO_Central
  • positive regulation of I-kappaB kinase/NF-kappaB signaling : ISS:ARUK-UCL
  • positive regulation of I-kappaB phosphorylation : IGI:ARUK-UCL
  • positive regulation of inflammatory response : IEP:UniProtKB
  • positive regulation of MAPK cascade : IGI:ARUK-UCL
  • positive regulation of microglial cell migration : IDA:ARUK-UCL
  • positive regulation of neuroblast proliferation : ISS:ARUK-UCL
  • positive regulation of neuron projection development : ISS:ARUK-UCL
  • positive regulation of NF-kappaB transcription factor activity : IGI:ARUK-UCL
  • positive regulation of protein kinase B signaling : IGI:ARUK-UCL
  • positive regulation of release of sequestered calcium ion into cytosol : IGI:ARUK-UCL
  • positive regulation of smooth muscle cell proliferation : ISS:ARUK-UCL
  • positive regulation of transcription by RNA polymerase II : ISS:ARUK-UCL
  • positive regulation of transforming growth factor beta1 production : IEA:Ensembl
  • regulation of lipopolysaccharide-mediated signaling pathway : IDA:ARUK-UCL
  • regulation of neurogenesis : TAS:ARUK-UCL
  • regulation of synaptic plasticity : TAS:ARUK-UCL
  • response to ischemia : ISS:ARUK-UCL
  • synapse pruning : TAS:ARUK-UCL
Back
(a) The Signal peptide D-score cutoff for "YES"(having signal peptide) is 0.45.
(b) Non-classically secreted proteins should obtain an NN-score(Neural Networks score) exceeding the normal threshold of 0.5, but not at the same time be predicted to contain a signal peptide.