Human IRF3 protein (Recombinant) (N-His) (STJP005408)
SPECIFICATIONS
HostE.coli
ImmunogenHomo sapiens (Human)
General Information
| Short Description | Recombinant-Human IRF3-N-His protein was developed from e.coli for the region N-His. For use in research applications. |
| Applications | ELISA/Immunogen/SDS-PAGE/WB |
| Host | E.coli |
| Note | STRICTLY FOR FURTHER SCIENTIFIC RESEARCH USE ONLY (RUO). MUST NOT BE USED IN DIAGNOSTIC OR THERAPEUTIC APPLICATIONS. |
Product Properties
| Dilution Range | Reconstitute in sterile water for a stock solution. A copy of datasheet will be provided with the products, please refer to it for details. |
| Formulation | Lyophilized from a solution in PBS pH 7.4, 0.02% NLS, 1mM EDTA, 4% Trehalose, 1% Mannitol. |
| Storage Instruction | Use a manual defrost freezer and avoid repeated freeze thaw cycles. Store at 2 to 8°C for frequent use. Store at-20 to-80°C for twelve months from the date of receipt. |
Target Information
| Gene Symbol | IRF3 |
| Gene ID | 3661 |
| Uniprot ID | IRF3_HUMAN |
| Immunogen | Homo sapiens (Human) |
| Immunogen Region | Met1-Ser123 |
Additional Info
| Post Translational Modifications | Constitutively phosphorylated on many Ser/Thr residues. Activated following phosphorylation by TBK1 and IKBKE. Innate adapter proteins, such as MAVS, STING1 or TICAM1, are first activated by viral RNA, cytosolic DNA, and bacterial lipopolysaccharide (LPS), respectively, leading to activation of the kinases TBK1 and IKBKE. These kinases then phosphorylate the adapter proteins on the pLxIS motif, leading to recruitment of IRF3, thereby licensing IRF3 for phosphorylation by TBK1. Phosphorylation at Ser-386 is followed by pyrophosphorylation at the same residue, promoting phosphorylation at Ser-396. Phosphorylated IRF3 dissociates from the adapter proteins, dimerizes, and then enters the nucleus to induce IFNs. Pyrophosphorylated by UAP1 following phosphorylation at Ser-386 by TBK1. Pyrophosphorylation promotes subsequent phosphorylation at Ser-396, leading to homodimerization of IRF3. Acetylation at Lys-366 by KAT8 inhibits recruimtent to promoters and transcription factor activity. Acetylation by KAT8 is promoted by phosphorylation at Ser-396. Ubiquitinated.ubiquitination involves RBCK1 leading to proteasomal degradation. Polyubiquitinated.ubiquitination involves TRIM21 leading to proteasomal degradation. Ubiquitinated by UBE3C, leading to its degradation. Deubiquitinated by USP5 on both 'Lys-48'-linked unanchored and 'Lys-63'-linked anchored polyubiquitin, leading to inhibition of anti-RNA viral innate immunity. ISGylated by HERC5 resulting in sustained IRF3 activation and in the inhibition of IRF3 ubiquitination by disrupting PIN1 binding. The phosphorylation state of IRF3 does not alter ISGylation. Proteolytically cleaved by apoptotic caspases during apoptosis, leading to its inactivation. Cleavage by CASP3 during virus-induced apoptosis inactivates it, preventing cytokine overproduction. (Microbial infection) ISGylated. ISGylation is cleaved and removed by SARS-COV-2 nsp3 which attenuates type I interferon responses. (Microbial infection) Phosphorylation and subsequent activation of IRF3 is inhibited by vaccinia virus protein E3. (Microbial infection) Phosphorylated by herpes simplex virus 1/HHV-1 US3 at Ser-175 to prevent IRF3 activation. |
| Function | Key transcriptional regulator of type I interferon (IFN)-dependent immune responses which plays a critical role in the innate immune response against DNA and RNA viruses. Regulates the transcription of type I IFN genes (IFN-alpha and IFN-beta) and IFN-stimulated genes (ISG) by binding to an interferon-stimulated response element (ISRE) in their promoters. Acts as a more potent activator of the IFN-beta (IFNB) gene than the IFN-alpha (IFNA) gene and plays a critical role in both the early and late phases of the IFNA/B gene induction. Found in an inactive form in the cytoplasm of uninfected cells and following viral infection, double-stranded RNA (dsRNA), or toll-like receptor (TLR) signaling, is phosphorylated by IKBKE and TBK1 kinases. This induces a conformational change, leading to its dimerization and nuclear localization and association with CREB binding protein (CREBBP) to form dsRNA-activated factor 1 (DRAF1), a complex which activates the transcription of the type I IFN and ISG genes. Can activate distinct gene expression programs in macrophages and can induce significant apoptosis in primary macrophages. In response to Sendai virus infection, is recruited by TOMM70:HSP90AA1 to mitochondrion and forms an apoptosis complex TOMM70:HSP90AA1:IRF3:BAX inducing apoptosis. Key transcription factor regulating the IFN response during SARS-CoV-2 infection. |
| Protein Name | Interferon Regulatory Factor 3Irf-3 |
| Database Links | Reactome: R-HSA-1169408Reactome: R-HSA-1606341Reactome: R-HSA-168928Reactome: R-HSA-3134973Reactome: R-HSA-3134975Reactome: R-HSA-3270619Reactome: R-HSA-877300Reactome: R-HSA-9013973Reactome: R-HSA-909733Reactome: R-HSA-918233Reactome: R-HSA-933541Reactome: R-HSA-936440Reactome: R-HSA-936964Reactome: R-HSA-9692916Reactome: R-HSA-9705671Reactome: R-HSA-9833109 |
| Cellular Localisation | CytoplasmNucleusMitochondrionShuttles Between Cytoplasmic And Nuclear CompartmentsWith Export Being The Prevailing EffectWhen ActivatedIrf3 Interaction With Crebbp Prevents Its Export To The CytoplasmRecruited To Mitochondria Via Tomm70:Hsp90aa1 Upon Sendai Virus Infection |
| Alternative Protein Names | Interferon Regulatory Factor 3 proteinIrf-3 proteinIRF3 protein |
Information sourced from Uniprot.org