anti-FOXP3 antibody

anti-FOXP3 antibody for ELISA,Western blot and Human,Mouse,Rat

Cell Biology and Cellular Response antibody; Gene Regulation antibody; Immune System antibody; Regulatory T cells Study antibody


Product Description Rabbit Polyclonal antibody recognizes FOXP3
Tested Reactivity Hu, Ms, Rat
Tested Application ELISA, WB
Host Rabbit
Clonality Polyclonal
Isotype IgG
Target Name FOXP3
Antigen Species Human
Immunogen Synthetic peptide (15 aa) within the last 50 aa of Human FOXP3.
Conjugation Un-conjugated
Alternate Names XPID; AIID; JM2; IPEX; PIDX; Forkhead box protein P3; Scurfin; DIETER

Application Instructions

Application Suggestion
Tested Application Dilution
WB1 - 2 μg/ml
Application Note * The dilutions indicate recommended starting dilutions and the optimal dilutions or concentrations should be determined by the scientist.
Positive Control A549 Cell Lysate


Form Liquid
Purification Affinity purification with immunogen.
Buffer PBS and 0.02% Sodium azide
Preservative 0.02% Sodium azide
Concentration 1 mg/ml
Storage Instruction For continuous use, store undiluted antibody at 2-8°C for up to a week. For long-term storage, aliquot and store at -20°C or below. Storage in frost free freezers is not recommended. Avoid repeated freeze/thaw cycles. Suggest spin the vial prior to opening. The antibody solution should be gently mixed before use.
Note For laboratory research only, not for drug, diagnostic or other use.


Database Links

GeneID: 20371 Mouse FOXP3

GeneID: 50943 Human FOXP3

Swiss-port # Q99JB6 Mouse Forkhead box protein P3

Swiss-port # Q9BZS1 Human Forkhead box protein P3

Gene Symbol FOXP3
Gene Full Name forkhead box P3
Background FOXP3 Antibody: FOXP3 is a member of the forkhead/winged-helix family of transcriptional regulators. FOXP3 acts as a repressor of transcription and regulates T cell activation, with its overexpression in CD4 T cells leading to an attenuation of activation-induced cytokine production and proliferation. In regulatory T (Treg) cells, FOXP3 is essential for Treg suppressor function and its expression leads to the repression of IL-17 expression. Genetic mutations involving FOXP3 are the cause of immunodeficiency polyendocrinopathy, enteropathy, X-linked syndrome (IPEX), also known as X-linked autoimmunity-immunodeficiency syndrome.
Function Transcriptional regulator which is crucial for the development and inhibitory function of regulatory T-cells (Treg). Plays an essential role in maintaining homeostasis of the immune system by allowing the acquisition of full suppressive function and stability of the Treg lineage, and by directly modulating the expansion and function of conventional T-cells. Can act either as a transcriptional repressor or a transcriptional activator depending on its interactions with other transcription factors, histone acetylases and deacetylases. The suppressive activity of Treg involves the coordinate activation of many genes, including CTLA4 and TNFRSF18 by FOXP3 along with repression of genes encoding cytokines such as interleukin-2 (IL2) and interferon-gamma (IFNG). Inhibits cytokine production and T-cell effector function by repressing the activity of two key transcription factors, RELA and NFATC2 (PubMed:15790681). Mediates transcriptional repression of IL2 via its association with histone acetylase KAT5 and histone deacetylase HDAC7 (PubMed:17360565). Can activate the expression of TNFRSF18, IL2RA and CTLA4 and repress the expression of IL2 and IFNG via its association with transcription factor RUNX1 (PubMed:17377532). Inhibits the differentiation of IL17 producing helper T-cells (Th17) by antagonizing RORC function, leading to down-regulation of IL17 expression, favoring Treg development (PubMed:18368049). Inhibits the transcriptional activator activity of RORA (PubMed:18354202). Can repress the expression of IL2 and IFNG via its association with transcription factor IKZF4 (By similarity). [UniProt]
Highlight Related products:
FOXP3 antibodies; FOXP3 Duos / Panels; Anti-Rabbit IgG secondary antibodies;
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Tumor-Infiltrating Lymphocytes (TILs)
Research Area Cell Biology and Cellular Response antibody; Gene Regulation antibody; Immune System antibody; Regulatory T cells Study antibody
Calculated MW 47 kDa
PTM Polyubiquitinated, leading to its proteasomal degradation in regulatory T-cells (Treg) which is mediated by STUB1 in a HSPA1A/B-dependent manner. Deubiquitinated by USP7 leading to increase in protein stability.
Phosphorylation at Ser-418 regulates its transcriptional repressor activity and consequently, regulatory T-cells (Treg) suppressive function. Dephosphorylated at Ser-418 by protein phosphatase 1 (PP1) in Treg cells derived from patients with rheumatoid arthritis. Phosphorylation by CDK2 negatively regulates its transcriptional activity and protein stability (By similarity).
Acetylation on lysine residues stabilizes FOXP3 and promotes differentiation of T-cells into induced regulatory T-cells (iTregs) associated with suppressive functions. Deacetylated by SIRT1.
Undergoes proteolytic cleavage in activated regulatory T-cells (Treg), and can be cleaved at either the N- or C-terminal site, or at both sites.

Images (1) Click the Picture to Zoom In

  • ARG54691 anti-FOXP3 antibody WB image

    Western blot: A549 cell lysate stained with ARG54691 anti-FOXP3 antibody at (A) 1 and (B) 2 ug/ml dilution.