Product: IRAK4 Antibody
Catalog: BF0371
Description: Mouse monoclonal antibody to IRAK4
Application: WB IHC ELISA FACS
Reactivity: Human, Mouse, Monkey
Mol.Wt.: 52kDa; 52kD(Calculated).
Uniprot: Q9NWZ3
RRID: AB_2833937

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 50ul $250 In stock
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 200ul $450 In stock

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Product Info

ELISA 1:10000, WB 1:500-1:2000, IHC 1:200-1:1000, FCM 1:200-1:400
*The optimal dilutions should be determined by the end user.

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.

Monoclonal [AFB1914]
IRAK4 antibody detects endogenous levels of total IRAK4.
Cite Format: Affinity Biosciences Cat# BF0371, RRID:AB_2833937.
Mouse IgG1 in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol. Store at -20 °C. Stable for 12 months from date of receipt.


IL-1 receptor-associated kinase 4; Interleukin 1 receptor associated kinase 4 mutant form 1; Interleukin-1 receptor-associated kinase 4; Interleukin1 receptor associated kinase 4; IPD1; IRAK 4; IRAK-4; IRAK4; IRAK4 mutated form 1; IRAK4_HUMAN; LOC 51135; NY REN 64; NY REN 64 antigen; NY-REN-64; REN64; Renal carcinoma antigen NY-REN-64;



Purified recombinant fragment of human IRAK4 expressed in E. Coli.

This gene encodes a kinase that activates NF-kappaB in both the Toll-like receptor (TLR) and T-cell receptor (TCR) signaling pathways. The protein is essential for most innate immune responses. Mutations in this gene result in IRAK4 deficiency and recurrent invasive pneumococcal disease. Multiple transcript variants encoding different isoforms have been found for this gene.

PTMs - Q9NWZ3 As Substrate

Site PTM Type Enzyme
M1 Acetylation
K3 Acetylation
K3 Ubiquitination
T6 Phosphorylation Q9NWZ3 (IRAK4)
S8 Phosphorylation Q9NWZ3 (IRAK4)
K33 Ubiquitination
K34 Acetylation
S114 Phosphorylation Q9NWZ3 (IRAK4)
K115 Ubiquitination
S150 Phosphorylation Q9NWZ3 (IRAK4)
S151 Phosphorylation Q9NWZ3 (IRAK4)
S152 Phosphorylation Q9NWZ3 (IRAK4)
S157 Phosphorylation
T208 Phosphorylation Q9NWZ3 (IRAK4)
T209 Phosphorylation Q9NWZ3 (IRAK4)
K313 Ubiquitination
S336 Phosphorylation
K338 Ubiquitination
T342 Phosphorylation Q9NWZ3 (IRAK4)
T345 Phosphorylation Q9NWZ3 (IRAK4)
S346 Phosphorylation Q9NWZ3 (IRAK4)
T352 Phosphorylation Q9NWZ3 (IRAK4)
K400 Sumoylation
K416 Ubiquitination

PTMs - Q9NWZ3 As Enzyme

Substrate Site Source
P14598 (NCF1) T133 Uniprot
P14598 (NCF1) T138 Uniprot
P14598 (NCF1) T153 Uniprot
P14598 (NCF1) S288 Uniprot
P14598 (NCF1) S320 Uniprot
P14598 (NCF1) S345 Uniprot
P14598 (NCF1) S348 Uniprot
P14598 (NCF1) T356 Uniprot
P14598 (NCF1) S359 Uniprot
P14598 (NCF1) S370 Uniprot
P51617-4 (IRAK1) S376 Uniprot
P51617-1 (IRAK1) T387 Uniprot
P58753 (TIRAP) T28 Uniprot
Q96FA3 (PELI1) S70 Uniprot
Q96FA3 (PELI1) S76 Uniprot
Q96FA3 (PELI1) S78 Uniprot
Q96FA3 (PELI1) T80 Uniprot
Q96FA3 (PELI1) S82 Uniprot
Q96FA3 (PELI1) T86 Uniprot
Q96FA3 (PELI1) T127 Uniprot
Q96FA3 (PELI1) T288 Uniprot
Q96FA3 (PELI1) S293 Uniprot
Q9NWZ3 (IRAK4) T6 Uniprot
Q9NWZ3 (IRAK4) S8 Uniprot
Q9NWZ3 (IRAK4) S114 Uniprot
Q9NWZ3 (IRAK4) S150 Uniprot
Q9NWZ3 (IRAK4) S151 Uniprot
Q9NWZ3 (IRAK4) S152 Uniprot
Q9NWZ3 (IRAK4) T208 Uniprot
Q9NWZ3 (IRAK4) T209 Uniprot
Q9NWZ3 (IRAK4) T342 Uniprot
Q9NWZ3 (IRAK4) T345 Uniprot
Q9NWZ3 (IRAK4) S346 Uniprot
Q9NWZ3 (IRAK4) T352 Uniprot

Research Backgrounds


Serine/threonine-protein kinase that plays a critical role in initiating innate immune response against foreign pathogens. Involved in Toll-like receptor (TLR) and IL-1R signaling pathways. Is rapidly recruited by MYD88 to the receptor-signaling complex upon TLR activation to form the Myddosome together with IRAK2. Phosphorylates initially IRAK1, thus stimulating the kinase activity and intensive autophosphorylation of IRAK1. Phosphorylates E3 ubiquitin ligases Pellino proteins (PELI1, PELI2 and PELI3) to promote pellino-mediated polyubiquitination of IRAK1. Then, the ubiquitin-binding domain of IKBKG/NEMO binds to polyubiquitinated IRAK1 bringing together the IRAK1-MAP3K7/TAK1-TRAF6 complex and the NEMO-IKKA-IKKB complex. In turn, MAP3K7/TAK1 activates IKKs (CHUK/IKKA and IKBKB/IKKB) leading to NF-kappa-B nuclear translocation and activation. Alternatively, phosphorylates TIRAP to promote its ubiquitination and subsequent degradation. Phosphorylates NCF1 and regulates NADPH oxidase activation after LPS stimulation suggesting a similar mechanism during microbial infections.



Subcellular Location:


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

Associates with MYD88 and IRAK2 to form a ternary complex called the Myddosome. Once phosphorylated, IRAK4 dissociates from the receptor complex and then associates with the TNF receptor-associated factor 6 (TRAF6), IRAK1, and PELI1; this intermediate complex is required for subsequent NF-kappa-B activation. Direct binding of SMAD6 to PELI1 prevents complex formation and hence negatively regulates IL1R-TLR signaling and eventually NF-kappa-B-mediated gene expression. Interacts with IL1RL1.


Belongs to the protein kinase superfamily. TKL Ser/Thr protein kinase family. Pelle subfamily.

Research Fields

· Environmental Information Processing > Signal transduction > MAPK signaling pathway.   (View pathway)

· Environmental Information Processing > Signal transduction > NF-kappa B signaling pathway.   (View pathway)

· Human Diseases > Infectious diseases: Bacterial > Pertussis.

· Human Diseases > Infectious diseases: Parasitic > Leishmaniasis.

· Human Diseases > Infectious diseases: Parasitic > Chagas disease (American trypanosomiasis).

· Human Diseases > Infectious diseases: Parasitic > Toxoplasmosis.

· Human Diseases > Infectious diseases: Bacterial > Tuberculosis.

· Human Diseases > Infectious diseases: Viral > Measles.

· Human Diseases > Infectious diseases: Viral > Influenza A.

· Organismal Systems > Immune system > Toll-like receptor signaling pathway.   (View pathway)

· Organismal Systems > Immune system > NOD-like receptor signaling pathway.   (View pathway)

· Organismal Systems > Nervous system > Neurotrophin signaling pathway.   (View pathway)

Restrictive clause


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