IRF4 Antibody - #DF6198

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Product: IRF4 Antibody
Catalog: DF6198
Description: Rabbit polyclonal antibody to IRF4
Application: WB IHC IF/ICC
Cited expt.: WB
Reactivity: Human, Mouse, Rat
Prediction: Horse, Dog
Mol.Wt.: 52kDa; 52kD(Calculated).
Uniprot: Q15306
RRID: AB_2838164

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Related Downloads
MS Report
HPLC Report
MSDS
Data Sheet
COA
Protocols
WB Handbook
IHC Protocol
IF/ICC Protocol

Product Info

Source:
Rabbit
Application:
WB 1:500-1:2000, IHC 1:50-1:200, IF/ICC 1:100-1:500
*The optimal dilutions should be determined by the end user.
*Tips:

WB: For western blot detection of denatured protein samples. IHC: For immunohistochemical detection of paraffin sections (IHC-p) or frozen sections (IHC-f) of tissue samples. IF/ICC: For immunofluorescence detection of cell samples. ELISA(peptide): For ELISA detection of antigenic peptide.

Reactivity:
Human,Mouse,Rat
Prediction:
Horse(91%), Dog(82%)
Clonality:
Polyclonal
Specificity:
IRF4 Antibody detects endogenous levels of total IRF4.
RRID:
AB_2838164
Cite Format: Affinity Biosciences Cat# DF6198, RRID:AB_2838164.
Conjugate:
Unconjugated.
Purification:
The antiserum was purified by peptide affinity chromatography using SulfoLink™ Coupling Resin (Thermo Fisher Scientific).
Storage:
Rabbit IgG in phosphate buffered saline , pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.
Alias:

Fold/Unfold

Interferon regulatory factor 4; IRF 4; IRF-4; Irf4; IRF4_HUMAN; LSIRF; Lymphocyte specific interferon regulatory factor; Lymphocyte specific IRF; Lymphocyte-specific interferon regulatory factor; Multiple myeloma oncogene 1; MUM 1; MUM1; NF EM5; NF-EM5; NFEM5; PU.1 interaction partner; Sfpi1/PU.1 interaction partner; Transcriptional activator PIP;

Immunogens

Immunogen:

A synthesized peptide derived from human IRF4, corresponding to a region within C-terminal amino acids.

Uniprot:

Q15306(IRF4_HUMAN) >>Visit HPA database.

Gene(ID):
IRF4(3662)
Expression:
Q15306 IRF4_HUMAN:

Lymphoid cells.

Description:
Interferon regulatory factors (IRFs) comprise a family of transcription factors that function within the Jak/Stat pathway to regulate interferon (IFN) and IFN-inducible gene expression in response to viral infection (1). IRFs play an important role in pathogen defense, autoimmunity, lymphocyte development, cell growth, and susceptibility to transformation. The IRF family includes nine members: IRF-1, IRF-2, ISGF3γ/p48, IRF-3, IRF-4 (Pip/LSIRF/ICSAT), IRF-5, IRF-6, IRF-7, and IRF-8/ICSBP. All IRF proteins share homology in their amino-terminal DNA-binding domains. IRF family members regulate transcription through interactions with proteins that share similar DNA-binding motifs, such as IFN-stimulated response elements (ISRE), IFN consensus sequences (ICS), and IFN regulatory elements (IRF-E) (2). IRF-4 was independently cloned by three groups and demonstrated to have roles in different contexts of lymphoid regulation (3-5). First, IRF-4 (Pip) was found to associate with PU.1, a hematopoietic specific member of the ETS family, and to regulate the expression of B-cell specific genes (3). Second, it was characterized as a lymphoid-specific member of the IRF family (LSIRF) and able to bind to ISRE (4). Third, it was identified in activated T cells as a factor that binds to the promoter of the interleukin-5 gene (ICSAT), and shown to repress gene activation induced by IFN (5). IRF-4 is expressed in all stages of B cell development and in mature T cells, and is inducible in primary lymphocytes by antigen mimetic stimuli such as Concavalin A, CD3 crosslinking, anti-IgM and PMA treatment (4,5). Mice deficient in IRF-4 show normal distribution of B and T lymphocytes at 4 to 5 weeks, but later develop progressive generalized lymphadenopathy, suggesting a role for IRF-4 in the function and homeostasis of mature B- and T-lymphocytes (6).
Sequence:
MNLEGGGRGGEFGMSAVSCGNGKLRQWLIDQIDSGKYPGLVWENEEKSIFRIPWKHAGKQDYNREEDAALFKAWALFKGKFREGIDKPDPPTWKTRLRCALNKSNDFEELVERSQLDISDPYKVYRIVPEGAKKGAKQLTLEDPQMSMSHPYTMTTPYPSLPAQQVHNYMMPPLDRSWRDYVPDQPHPEIPYQCPMTFGPRGHHWQGPACENGCQVTGTFYACAPPESQAPGVPTEPSIRSAEALAFSDCRLHICLYYREILVKELTTSSPEGCRISHGHTYDASNLDQVLFPYPEDNGQRKNIEKLLSHLERGVVLWMAPDGLYAKRLCQSRIYWDGPLALCNDRPNKLERDQTCKLFDTQQFLSELQAFAHHGRSLPRFQVTLCFGEEFPDPQRQRKLITAHVEPLLARQLYYFAQQNSGHFLRGYDLPEHISNPEDYHRSIRHSSIQE

Predictions

Predictions:

Score>80(red) has high confidence and is suggested to be used for WB detection. *The prediction model is mainly based on the alignment of immunogen sequences, the results are for reference only, not as the basis of quality assurance.

Species
Results
Score
Horse
91
Dog
82
Pig
64
Bovine
60
Sheep
60
Xenopus
0
Zebrafish
0
Chicken
0
Rabbit
0
Model Confidence:
High(score>80) Medium(80>score>50) Low(score<50) No confidence

Research Backgrounds

Function:

Transcriptional activator. Binds to the interferon-stimulated response element (ISRE) of the MHC class I promoter. Binds the immunoglobulin lambda light chain enhancer, together with PU.1. Probably plays a role in ISRE-targeted signal transduction mechanisms specific to lymphoid cells. Involved in CD8(+) dendritic cell differentiation by forming a complex with the BATF-JUNB heterodimer in immune cells, leading to recognition of AICE sequence (5'-TGAnTCA/GAAA-3'), an immune-specific regulatory element, followed by cooperative binding of BATF and IRF4 and activation of genes (By similarity).

PTMs:

Phosphorylation by ROCK2 regulates IL-17 and IL-21 production.

Subcellular Location:

Nucleus.

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionSubcellular location
Tissue Specificity:

Lymphoid cells.

Family&Domains:

Belongs to the IRF family.

Research Fields

· Organismal Systems > Immune system > Th17 cell differentiation.   (View pathway)

References

1). MAPK4 inhibits the early aberrant activation of B cells in rheumatoid arthritis by promoting the IRF4-SHIP1 signaling pathway. Cell death & disease, 2025 (PubMed: 39863600) [IF=8.1]

Application: WB    Species: human    Sample:

Fig. 7: MAPK4 inhibits the activation of the PI3K signaling pathway in B cells of arthritis mice by activating the IRF4-SHIP1 pathway. A Western blot analysis of pSHIP1 and pIRF4 expression levels in B cells from WT and MAPK4 KO mice stimulated in vitro with sAg for 0, 5, 10, and 30 min. B Western blot analysis of SHIP1 expression in B cells from WT and MAPK4 KO mice. C Co-immunoprecipitation assay to analyze the interaction between IRF4 and MAPK4. D Western blot analysis of pIRF4, pSHIP1, pPI3K (p85), and pAKT expression levels in WT B cells stimulated in vitro with sAg for 0, 5, 10, and 30 min, with or without Vacquinol-1 treatment. Representative blots from three independent experiments are presented for all of the above. E–H Flow cytometry (E-G) and statistical (H) analysis of FO(E), T1(E), T2(E), MZ(F), and GC (G) B cell subpopulations in WT mice treated in vivo with or without Vacquinol-1 every other day for 14 days (n = 5). I–K Flow cytometry (I) and statistical analysis (J-K) of CD4 and CD8 T cells from the spleen and thymus in WT mice treated in vivo with or without Vacquinol-1 every other day for 14 days (n = 5). L, M Flow cytometric analysis of IL-10 and IL-6 expression levels in B cells from WT, CIA, and CIA mice treated in vitro with Vacquinol-1 for 1 h (n = 4). *P 

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