Synthetic phospho-peptide corresponding to residues surrounding Ser396 of human IRF3.
Species Reactivity
Human, Mouse (Predicted: Rat)
Predicted species support after-sales service
Validated Applications
WB, IHC-P, IF-Cell, FC
Target Molecular Weight
Predicted band size: 47 kDa
Positive Control
HT-29 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate, J774A.1 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate, C2C12 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate, NIH/3T3 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate, human testis tissue, HT-29 cells transfected with 2.5μg/mL Poly(I:C) for 6 hours.
Conjugation
unconjugated
Clone Number
PSH06-75
Product Features
Form
Liquid
Concentration
1 mg/mL.(The concentration of this product may be batch-dependent)
Lot Concentration Lookup
Storage Instructions
Shipped at 4℃. Store at +4℃ short term (1-2 weeks). Store at -20℃ long term.
Interferon regulatory factor 3, also known as IRF3, is an interferon regulatory factor. IRF3 is a member of the interferon regulatory transcription factor (IRF) family. IRF3 was originally discovered as a homolog of IRF1 and IRF2. IRF3 has been further characterized and shown to contain several functional domains including a nuclear export signal, a DNA-binding domain, a C-terminal IRF association domain and several regulatory phosphorylation sites. IRF3 is found in an inactive cytoplasmic form that upon serine/threonine phosphorylation forms a complex with CREBBP. The complex translocates into the nucleus for the transcriptional activation of interferons alpha and beta, and further interferon-induced genes.
Background References
1. Al Hamrashdi M et al. Regulation of IRF3 activation in human antiviral signaling pathways. Biochem Pharmacol. 2022 Jun
2. Yan S et al. IRF3 reduces adipose thermogenesis via ISG15-mediated reprogramming of glycolysis. J Clin Invest. 2021 Apr
Western blot analysis of Phospho-IRF3 (S396) on different lysates with Rabbit anti-Phospho-IRF3 (S396) antibody (HA722772) at 1/1,000 dilution.
Lane 1: HT-29 untransfected cell lysate Lane 2: HT-29 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate Lane 3: J774A.1 untransfected cell lysate Lane 4: J774A.1 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate Lane 5: HT-29 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate, then the membrane treated with λpp for 1 hour
Lysates/proteins at 20 µg/Lane.
Predicted band size: 47 kDa Observed band size: 47-55 kDa
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (HA722772) at 1/1,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
☑ Cell treatment (CT)
Western blot analysis of Phospho-IRF3 (S396) on different lysates with Rabbit anti-Phospho-IRF3 (S396) antibody (HA722772) at 1/5,000 dilution.
Lane 1: C2C12 (Mouse myoblast) cell lysate Lane 2: C2C12 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate Lane 3: NIH/3T3 (Mouse fibroblast) cell lysate Lane 4: NIH/3T3 transfected with 2.5μg/mL Poly(I:C) for 6 hours cell lysate
Lysates/proteins at 15 µg/Lane. Exposure time: 56 seconds; ECL: K1801
Blocking: 5% NFDM/TBST, 1 hour at room temperature Primary antibody: HA722772, 1/5,000 in primary antibody dilution buffer (K1803), overnight at 4 ℃ Secondary antibody: Goat anti-Rabbit IgG-HRP (HA1001), 1/50,000 in 5% NFDM/TBST, 1 hour at room temperature
Predicted band size: 47 kDa Observed band size: 47 kDa
☑ Cell treatment (CT)
Immunohistochemical analysis of paraffin-embedded human testis tissue untreated / treated with λpp with Rabbit anti-Phospho-IRF3 (S396) antibody (HA722772) at 1/200 dilution.
The section was pre-treated using heat mediated antigen retrieval with Tris-EDTA buffer (pH 9.0) for 20 minutes. The tissues were blocked in 1% BSA for 20 minutes at room temperature, washed with ddH2O and PBS, and then probed with the primary antibody (HA722772) at 1/200 dilution for 1 hour at room temperature. The detection was performed using an HRP conjugated compact polymer system. DAB was used as the chromogen. Tissues were counterstained with hematoxylin and mounted with DPX.
☑ Cell treatment (CT)
Immunocytochemistry analysis of untreated HT-29 cells (top) / HT-29 cells transfected with 2.5μg/mL Poly(I:C) for 6 hours (bottom) labeling Phospho-IRF3 (S396) with Rabbit anti-Phospho-IRF3 (S396) antibody (HA722772) at 1/100 dilution.
Cells were fixed in 4% paraformaldehyde for 20 minutes at room temperature, permeabilized with 0.1% Triton X-100 in PBS for 5 minutes at room temperature, then blocked with 1% BSA in 10% negative goat serum for 1 hour at room temperature. Cells were then incubated with Rabbit anti-Phospho-IRF3 (S396) antibody (HA722772) at 1/100 dilution in 1% BSA in PBST overnight at 4 ℃. Goat Anti-Rabbit IgG H&L (iFluor™ 488, HA1121) was used as the secondary antibody at 1/1,000 dilution. PBS instead of the primary antibody was used as the secondary antibody only control. Nuclear DNA was labelled in blue with DAPI.
Beta tubulin (M1305-2, red) was stained at 1/100 dilution overnight at +4℃. Goat Anti-Mouse IgG H&L (iFluor™ 594, HA1126) was used as the secondary antibody at 1/1,000 dilution.
☑ Cell treatment (CT)
Flow cytometric analysis of untreated HT-29 cells (top) / HT-29 cells transfected with 2.5μg/mL Poly(I:C) for 6 hours (bottom) labeling Phospho-IRF3 (S396).
Cells were fixed and permeabilized. Then stained with the primary antibody (HA722772, 1/1,000) (right) compared with Rabbit IgG Isotype Control (left). After incubation of the primary antibody at +4℃ for an hour, the cells were stained with a iFluor™ 488 conjugate-Goat anti-Rabbit IgG Secondary antibody (HA1121) at 1/1,000 dilution for 30 minutes at +4℃.
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