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FKHR Antibody

Rabbit Monoclonal Antibody

  • WB - FKHR Antibody AJ1302a
    A. Western blot analysis on NIH/3T3 cell lysate using anti-FKHR RabMAb (Cat. #AJ1302a), dilution 1:1000
  • IHC - FKHR Antibody AJ1302a
    B. Immunohistochemical staining of paraffin-embedded human bladder carcinoma using anti-FKHR RabMAb (Cat. #AJ1302a).
  • IF - FKHR Antibody AJ1302a
    C. Immunofluorescent staining of HeLa cells using anti-FKHR RabMAb (Cat. #AJ1302a).
Product Information
  • Applications Legend:
  • WB=Western Blot
  • IHC=Immunohistochemistry
  • IHC-P=Immunohistochemistry (Paraffin-embedded Sections)
  • IHC-F=Immunohistochemistry (Frozen Sections)
  • IF=Immunofluorescence
  • FC=Flow Cytopmetry
  • IC=Immunochemistry
  • ICC=Immunocytochemistry
  • IP=Immunoprecipitation
  • DB=Dot Blot
  • CHIP=Chromatin Immunoprecipitation
  • FA=Fluorescence Assay
  • IEM=Immunoelectronmicroscopy
  • EIA=Enzyme Immunoassay
Primary Accession Q12778
Reactivity Human, Mouse, Rat
Host Rabbit
Clonality Monoclonal
Clone Names EP927Y
Calculated MW 69662 Da
Gene ID 2308
Other Names Forkhead box protein O1, Forkhead box protein O1A, Forkhead in rhabdomyosarcoma, FOXO1, FKHR, FOXO1A
Target/Specificity A synthetic peptide corresponding to residues surrounding Ser329 of human FKHR was used as immunogen. Anti-FKHR RabMab recognizes both phosphorylated and unphosphorylated FKHR.
Dilution WB~~1:500~1000
Format 50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.
PrecautionsFKHR Antibody is for research use only and not for use in diagnostic or therapeutic procedures.
Protein Information
Name FOXO1
Synonyms FKHR, FOXO1A
Function Transcription factor that is the main target of insulin signaling and regulates metabolic homeostasis in response to oxidative stress. Binds to the insulin response element (IRE) with consensus sequence 5'-TT[G/A]TTTTG-3' and the related Daf-16 family binding element (DBE) with consensus sequence 5'- TT[G/A]TTTAC-3'. Activity suppressed by insulin. Main regulator of redox balance and osteoblast numbers and controls bone mass. Orchestrates the endocrine function of the skeleton in regulating glucose metabolism. Acts synergistically with ATF4 to suppress osteocalcin/BGLAP activity, increasing glucose levels and triggering glucose intolerance and insulin insensitivity. Also suppresses the transcriptional activity of RUNX2, an upstream activator of osteocalcin/BGLAP. In hepatocytes, promotes gluconeogenesis by acting together with PPARGC1A and CEBPA to activate the expression of genes such as IGFBP1, G6PC and PCK1. Important regulator of cell death acting downstream of CDK1, PKB/AKT1 and SKT4/MST1. Promotes neural cell death. Mediates insulin action on adipose tissue. Regulates the expression of adipogenic genes such as PPARG during preadipocyte differentiation and, adipocyte size and adipose tissue-specific gene expression in response to excessive calorie intake. Regulates the transcriptional activity of GADD45A and repair of nitric oxide- damaged DNA in beta-cells. Required for the autophagic cell death induction in response to starvation or oxidative stress in a transcription-independent manner.
Cellular Location Cytoplasm {ECO:0000250|UniProtKB:Q9R1E0}. Nucleus {ECO:0000250|UniProtKB:Q9R1E0}. Note=Shuttles between the cytoplasm and nucleus. Largely nuclear in unstimulated cells. In osteoblasts, colocalizes with ATF4 and RUNX2 in the nucleus (By similarity). Insulin-induced phosphorylation at Ser-256 by PKB/AKT1 leads, via stimulation of Thr-24 phosphorylation, to binding of 14-3-3 proteins and nuclear export to the cytoplasm where it is degraded by the ubiquitin-proteosomal pathway Phosphorylation at Ser-249 by CDK1 disrupts binding of 14-3-3 proteins and promotes nuclear accumulation. Phosphorylation by NLK results in nuclear export. Translocates to the nucleus upon oxidative stress-induced phosphorylation at Ser-212 by STK4/MST1 SGK1-mediated phosphorylation also results in nuclear translocation. Retained in the nucleus under stress stimuli including oxidative stress, nutrient deprivation or nitric oxide Retained in the nucleus on methylation.
Tissue Location Ubiquitous..
Research Areas
Citations (0)

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FKHR (FoxO1), a member of the FoxO subfamily of forkhead transcription factors, is an important target for insulin and growth factor signaling in the regulation of metabolism, cell cycle and proliferation, and survival in peripheral tissues (1). FKHR is regulated by insulin via Akt-dependent phosphorylation and nuclear exclusion. It has been shown that FoxO1 is induced in the early stages of adipocyte differentiation but that its activation is delayed until the end of the clonal expansion phase. Constitutively active FoxO1 prevents the differentiation of preadipocytes, while dominant-negative Foxo1 restores adipocyte differentiation of fibroblasts from insulin receptor-deficient mice (2). Conserved residue (Ser329) is a novel in-vivo phosphorylation site on FKHR. Phosphorylation of this site also decreases the ability of FKHR to stimulate gene transactivation and reduces the proportion of FKHR present in the nucleus (3)


1. Gan L, et al. J. Neurochem 93(5):1209-19, 2005
2. Nakae J, et al. Dev Cell 4(1):119-29, 2003
3. Woods YL, Biochem J. 355(3):597-607, 2001

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Cat# AJ1302a
(40 western blots)
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