Selected-GenAtlas references SOURCE GeneCards NCBI Gene Swiss-Prot Ensembl
HGNC UniGene Nucleotide OMIM UCSC
Home Page
FLASH GENE
Symbol FCGRT contributors: mct - updated : 07-02-2018
HGNC name Fc fragment of IgG, receptor, transporter, alpha
HGNC id 3621
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • signal peptide,
  • three extracellular domains
  • transmembrane and cytoplasmic region
  • conjugated GlycoP
    HOMOLOGY
    interspecies ortholog to murine Fcgrt
    homolog to rattus Fcgrt
    homolog to C.elegans B0361.7
    Homologene
    FAMILY
  • MHC,class 1 family
  • immunoglobulin superfamily
  • CATEGORY immunity/defense , receptor membrane
    SUBCELLULAR LOCALIZATION     plasma membrane
    text type I membrane protein
    basic FUNCTION
  • mediating the uptake of IgG from milk
  • involved in the transport of maternal IgG to the fetus, and protection of circulating IgG from catabolism
  • expressed in podocytes and functions to internalize IgG from the glomerular basement membrane (GBM)
  • major histocompatibility complex class I-related molecule that regulates the half-life of IgG and albumin
  • FCGRT expression has a different effect on Ag processing and presentation of immune-complex to CD4(+) T cells in the endosomal versus phagosomal compartments of macrophages (Ms) versus dendritic cells
  • IgG is transcytosed across intestinal epithelial cells of suckling mammals by the neonatal Fc receptor FCGRT
  • prevents IgG degradation by efficiently sorting IgG into recycling endosomes and away from lysosomes
  • physical properties of the lumenal ligand-receptor complex appear to act as key determinants for sorting between the recycling and lysosomal pathways by regulating FGRT entry into recycling tubules
  • plays a critical role in the homeostasis and degradation of immunoglobulin G (IgG)
  • has the potential to interact with IgG-Fc domains in the ciliary epithelium and retinal and choroidal vasculature
  • possible involvement of promoter binding transcription factors (TFs) in the regulation of the human FCGRT gene expression
  • role of FCGRT in IgG transcytosis in the nasal epithelium
  • serum albumin is the most abundant plasma protein and has a long half-life due to neonatal FCGRT-mediated transcytosis by many cell types, including proximal tubule cells of the kidney
  • may be associated with the transport and metabolism of IgG in thyrocytes and this transport is independent of IgG type
  • may be involved in Hashimoto's thyroiditis (HT) pathogenesis
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component heavy chain 48kDa and beta 2 microglobulin 12kDa
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • binding to the Fc region of IgG
  • renal FCGRT reclaims ALB, thereby maintaining the serum concentration of albumin, but facilitates the loss of IgG from plasma protein pools
  • like IgG, albumin has long serum half-life, protected from degradation by pH-dependent recycling mediated by interaction with FCGRT
  • extending serum half-life of ALB by engineering neonatal Fc receptor (FCGRT) binding
  • FCGRT protects albumin from intracellular degradation via a pH-dependent cellular recycling mechanism
  • cellular ALB internalization was proportional to FGRT expression and albumin-binding affinity
  • FCGRT-dependent endosomal cellular-sorting pathway has great importance in describing fundamental mechanisms of intracellular ALB recycling
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    ANIMAL & CELL MODELS