Recombinant Human IgG receptor FcRn large subunit p51(FCGRT),partial

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Code CSB-EP008545HU
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  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.

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Product Details

Purity Greater than 90% as determined by SDS-PAGE.
Target Names FCGRT
Uniprot No. P55899
Research Area Immunology
Alternative Names Alpha chain; Fc fragment of IgG; receptor transporter; alpha; FCGRN_HUMAN; FCGRT; FcRn alpha chain; FcRn; FCRN; alpha chain; IgG Fc fragment receptor transporter alpha chain; IgG Gc receptor; IgG receptor FcRn large subunit p51; IgG receptor FcRn large subunit p51 precursor; Immunoglobulin receptor; intestinal; heavy chain; Neonatal Fc receptor
Species Homo sapiens (Human)
Source E.coli
Expression Region 24-297aa
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight 57.4kDa
Protein Length Extracellular Domain
Tag Info N-terminal GST-tagged
Form Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time Basically, we can dispatch the products out in 3-7 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

Target Data

Function Binds to the Fc region of monomeric immunoglobulins gamma
Gene References into Functions
  1. As expected, recombinant factor IX (without albumin fusion) and an FcRn interaction-defective albumin variant localized to the lysosomal compartments of both FcRn-expressing and nonexpressing cells. These results indicate that FcRn-mediated recycling via the albumin moiety is a mechanism for the half-life extension of rIX-FP observed in clinical studies. PMID: 29523681
  2. Regulation of the Human Fc-Neonatal Receptor alpha-Chain Gene FCGRT by MicroRNA-3181. PMID: 29302759
  3. we have demonstrated that loss of FcRn expression promotes tumor cell growth and proliferation. Our data support a model in which FcRn-mediated recycling of albumin reduces amino acid availability to fuel metabolic pathways. PMID: 27974681
  4. An arginine-to-histidine replacement at residue 435 in the binding domain of IgG3 to FcRn increases the transplacental transfer and half-life of malaria-specific IgG3 in young infants and is associated with reduced risk of clinical malaria during infancy. PMID: 28991911
  5. these findings establish a novel mechanism of humoral protection in the eye involving FcRn and may facilitate vaccine and therapeutic development for other ocular surface diseases PMID: 28760885
  6. Data suggest that, unlike albumin with low FcRn-binding affinity, albumin with high FcRn-binding affinity (due to genetic variation/genetic engineering) is directed less to lysosomes and more to endosomes, suggestive of FcRn-directed albumin salvage from lysosomal degradation. (FcRn = neonatal Fc receptor) PMID: 28637874
  7. the localization of FcRn alpha-chain in fixed nasal tissue, was studied. PMID: 26634928
  8. FcRn is involved in transport of aflibercept through REC in vitro. PMID: 27836572
  9. this study shows that FcRn may be associated with the transport and metabolism of IgG in thyrocytes and that transport is independent of IgG type, and that FcRn may be involved in Hashimoto's thyroiditis pathogenesis PMID: 28081504
  10. This review summarizes the main findings on Fc Receptor neonatal biology, function and distribution throughout different tissues. PMID: 27016466
  11. The results suggest that regardless of hyperglycemia degree, it decreases FcRn expression in placenta and blood cells and compromises the production and transfer of antibodies from maternal blood to newborns. PMID: 27469170
  12. Data indicate improved pharmacokinetics through enhanced neonatal Fc receptor (FcRn) interactions were apparent for a complementarity-determining region (CDR) charge-patch normalized monoclonal antibody (mAb) which was affected by non-specific clearance. PMID: 26337808
  13. analysis of binding motifs in the hFCGRT promoter that interact with their corresponding (Sp1, Sp2, Sp3, c-Fos, c-Jun, YY1, and C/EBPbeta or C/EBPdelta) transcription factors (TFs) suggests their involvement in regulation of human FCGRT gene expression PMID: 26252948
  14. These data indicate that human FcRn facilitates the transepithelial transport of IgE in the form of IgG anti-IgE/IgE ICs. PMID: 25652137
  15. Critical Role of the Neonatal Fc Receptor (FcRn) in the Pathogenic Action of Antimitochondrial Autoantibodies Synergizing with Anti-desmoglein Autoantibodies in Pemphigus Vulgaris. PMID: 26260795
  16. FcRn binding activity of a large set of Fc-fusion samples after thermal stress, was investigated. PMID: 26254986
  17. The neonatal Fc receptor (FcRn) binds independently to both sites of the IgG homodimer with identical affinity. PMID: 25658443
  18. These results suggest that hFcRn Tgm are a valuable and useful tool for pharmacokinetic screening of mAbs and Fc-fusion proteins in the preclinical stage. PMID: 25030041
  19. The extents of IgG expression in 86 lung cancers were found to associate with clinical stage, pathological grade and lymph node metastasis. PMID: 24853685
  20. Molecular dynamic simulations of human FcRn-Fc binding structures proposed that the protein-protein binding interface is composed of three subsites. PMID: 24057047
  21. This mAb panel provides a powerful resource for probing the biology of human FcRn and for the evaluation of therapeutic FcRn blockade strategies. PMID: 22453095
  22. domain I and III of albumin required for optimal pH-dependent binding to the neonatal Fc receptor PMID: 25344603
  23. Characterization and screening of IgG binding to the neonatal Fc receptor. PMID: 24802048
  24. In intestine, there was an increasing proximal-distal gradient of mucosal FcRn mRNA and protein expression. PMID: 24072267
  25. A cluster of conserved tryptophan residues of FcRn is required for binding to albumin and anti-FcRn albumin blocking antibodies. PMID: 24764301
  26. Extending serum half-life of albumin by engineering neonatal Fc receptor (FcRn) binding. PMID: 24652290
  27. The Neonatal Fc receptor (FcRn) enhances human immunodeficiency virus type 1 (HIV-1) transcytosis across epithelial cells. PMID: 24278022
  28. analysis of neonatal Fc receptor-based recycling mechanisms through identification of the human Fc interaction with human FcRn PMID: 24469444
  29. FcRn has the potential to interact with IgG-Fc domains in the ciliary epithelium and retinal and choroidal vasculature, which might affect the half-life and distribution of intravitreally injected Fc-carrying molecules. PMID: 24550358
  30. Only the unbound receptor or FcRn bound to monomeric IgG is sorted into recycling tubules emerging from early endosomes. PMID: 23741050
  31. Analytical FcRn chromatography allows differentiation of IgG samples and variants by peak pattern and retention time profile. PMID: 23765230
  32. The FCGRT promoter VNTR may influence mAbs' distribution in the body. CNV of FCGRT cannot be used as a relevant pharmacogenetic marker because of its low frequency. PMID: 23751752
  33. Studies indicate that high levels of endogenous IgG can compete with the monoclonal antibodies (mAbs) for binding to the neonatal Fc receptor (FcRn). PMID: 23917469
  34. Data indicate that Fc-neonatal Fc receptor (FcRn) interaction is pH dependent. PMID: 23384837
  35. Human FcRn was visualized in epithelial cells of Tg276 mice, but low serum hIgG levels were obtained PMID: 23220220
  36. genetic polymorphism is associated with the efficiency of Ig replacement therapy in common variable immunodeficiency PMID: 23286945
  37. Serum half-life of IgG is controlled by the neonatal Fc receptor (FcRn) that interacts with the IgG Fc region and may be increased or decreased as a function of altered FcRn binding. PMID: 22570488
  38. Structure-based mutagenesis reveals the albumin-binding site of the neonatal Fc receptor PMID: 22215085
  39. FcRn transgene blockade is a primary contributing factor toward reduction in arthritis severity; engineering of antibody Fc regions to generate potent FcRn blockers holds promise for the therapy of antibody-mediated autoimmunity in experimental arthritis. PMID: 21690327
  40. Thirty-three genetic variations of FCGRT, including 17 novel ones, were found. PMID: 20930418
  41. These studies demonstrate that FcRn-mediated transport is a mechanism by which IgG can act locally in the female genital tract in immune surveillance and in host defense against sexually transmitted diseases. PMID: 21368166
  42. Methionine (Met) oxidation can result in a significant reduction of the serum circulation half-life and the magnitude of the change correlates well with the extent of Met oxidation and changes in FcRn binding affinities. PMID: 21256596
  43. promoter polymorphism is not associted with the rate of maternal-fetal IgG transfer PMID: 20452034
  44. the x-ray crystal structure of a representative monomeric peptide in complex with human FcRn PMID: 20592032
  45. influence of FcRn expression on disease phenotype and the catabolism of therapeutically administered intravenous immunoglobulins in 28 patients with common variable immunodeficiency PMID: 20627700
  46. No binding of albumin was observed at physiological pH to neonatal Fc receptor. At acidic pH, a 100-fold difference in binding affinity was observed. PMID: 20018855
  47. A recombinant truncated HSA variant, HSA(Bartin), does not interact with FcRn, which gives a molecular explanation for the low serum levels. PMID: 20006594
  48. Affinities to FcRn of clinically used therapeutic proteins are closely correlated with the serum half-lives reported from clinical studies, and suggest an important role of FcRn in regulating the serum half-lives of the therapeutic proteins. PMID: 20083659
  49. Human FcRn binds selectively to human, rabbit and guinea pig IgG but not significantly to rat, bovine, sheep or mouse IgG (except for weak binding to mouse IgG2b). PMID: 11717196
  50. Assembly of the FcRn alpha-chain with beta(2)microglobulin is important for both transport of FcRn from the ER to the cell surface and efficient pH-dependent IgG binding. PMID: 12006623
  51. Functional reconstitution in Madin-Darby canine kidney cells requires co-expressed human beta 2-microglobulin PMID: 12023961
  52. although a secreted soluble form of human FcRn does not dimerize, the membrane-anchored receptor can form both non-covalent and covalent dimers; dimerization of human FcRn occurs in the absence of its ligand, IgG PMID: 12144784
  53. Expression of FcRn is demonstrated along the human fetal intestine and in a human nonmalignant fetal intestinal epithelial cell line (H4), which by location indicates that FcRn could play a role in the uptake and transport of IgG in the human fetus. PMID: 12538789
  54. data show that it is possible to confer binding of mouse immunoglobulin G on human FcRn by mutagenesis of selected residues; observations are of direct relevance to understanding the molecular nature of the human FcRn-IgG interaction PMID: 12972260
  55. Analysis of the dynamics and properties of trafficking of FcRn in live microvascular endothelial cells shows that the primary site at which FcRn sorts IgGs for either salvage or lysosomal degradation is the sorting endosome. PMID: 14764666
  56. strong cell surface polarity displayed by hFcRn results from dominant basolateral sorting by motifs in the cytoplasmic tail that nonetheless allows for a cycle of bidirectional transcytosis PMID: 14767057
  57. FCRN is involved in IgG exocytosis. PMID: 15258288
  58. residues encompassing and extending away from the interaction site on the alpha2 helix of FcRn play a significant and most likely indirect role in FcRn-IgG interactions PMID: 15644205
  59. expression of a functional FcRn in normal human epidermal keratinocytes. PMID: 15654966
  60. FcRn leaves sorting endosomes in Rab4(+)Rab11(+) or Rab11(+) compartments PMID: 15689494
  61. These transport and localization data are in accordance with efficient hFcRn-mediated apical IgG recycling and basolateral directed IgG transcytosis in placental trophoblasts. PMID: 16229888
  62. FcRn binds IgG and albumin, salvages both from a degradative fate, and maintains their physiologic concentrations PMID: 16549777
  63. a variable number of tandem repeats promoter polymorphism influences the expression of the FcRn receptor, leading to different IgG-binding capacities PMID: 16805790
  64. FcRn fulfills a major role in IgG-mediated phagocytosis PMID: 16849638
  65. FcRn-mediated recycling is a major contributor to the high endogenous concentrations of IgG and serum albumin, two important plasma proteins. PMID: 17046328
  66. Our results show clear evidence that the conserved H166 is a key player in the FcRn-albumin interaction. PMID: 17048273
  67. Elucidation of intracellular recycling pathways leading to exocytosis of FCRN was facilitated by using multifocal plane micoscopy. PMID: 17384151
  68. Neonatal Fc receptor (FcRn) was expressed in various cells of the human skin (including keratinocytes, melanocytes, and histiocytes). PMID: 17674040
  69. This review summarizes FcRn biology. PMID: 17703228
  70. These data provide the first evidence that NF-kappaB signaling via intronic sequences regulates FcRn expression and function. PMID: 17709515
  71. These results suggest a novel mechanism for regulation of IgG transport by calmodulin-dependent sorting of FcRn and its cargo away from a degradative pathway and into a bidirectional transcytotic route. PMID: 18003977
  72. JAK/STAT-1 signaling pathway was necessary and sufficient to mediate the down-regulation of FcRn gene expression by IFN-gamma PMID: 18566411
  73. A previously undescribed role for FcRn in mediating the presentation of antigens by dendritic cells when antigens are present as a complex with antibody, is shown. PMID: 18599440
  74. The impact of two free cysteine residues (C48 and C251) of the FcRn heavy chain on the overall structure and function of soluble human FcRn is explored. PMID: 18637944
  75. Intracellular trafficking of FcRn is regulated by its intrinsic sorting information and/or an interaction with major histocompatibility (MHC) class II invariant chain (Ii). PMID: 18684948
  76. Results indicate that FcRn-dependent internalization of IgG may be important not only in cells taking up IgG from an extracellular acidic space, but also in endothelial cells participating in homeostatic regulation of circulating IgG levels. PMID: 18843053
  77. N-glycans in FcRn contribute significantly to the steady-state membrane distribution and direction of IgG transport in polarized epithelia. PMID: 19164298
  78. The role of hFcRn in IgG transport and trafficking in syncytiotrophoblasts cultures in vitro. PMID: 19362735
  79. a single structurally and functionally heterogeneous recycling endosome compartment that traffics FcRn to both cell surfaces while discriminating between recycling and transcytosis pathways polarized in their direction of transport PMID: 19451275
  80. It plays a role in intracellular IGG transfer and immune surveillance. (review) PMID: 19462839
  81. VNTR polymorphisms within the FCGRT promoter are not associated with LN in the Chinese population. PMID: 19772792

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Subcellular Location Cell membrane, Single-pass type I membrane protein
Protein Families Immunoglobulin superfamily
Tissue Specificity Expressed in full-term placenta, heart, lung, liver, muscle, kidney, pancreas, and both fetal and adult small intestine.
Database Links

HGNC: 3621

OMIM: 601437

KEGG: hsa:2217

STRING: 9606.ENSP00000221466

UniGene: Hs.111903

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