IRF5 Protein, Human

The IRF5 protein is a key transcription factor in innate immunity and activates type I interferon (IFN) and inflammatory cytokine genes through endolysosomal Toll-like receptors (TLR7, TLR8, TLR9). It regulates IFN genes and IFN-stimulated genes (ISGs) by binding to ISREs in their promoters. IRF5 Protein, Human is the recombinant human-derived IRF5 protein, expressed by E. coli , with C-6*His labeled tag.

IRF5, a critical transcription factor, assumes a pivotal role in innate immunity by orchestrating the activation of type I interferon (IFN) genes, including IFNA and INFB, and inflammatory cytokines downstream of endolysosomal toll-like receptors (TLR7, TLR8, and TLR9). It functions as a key regulator in the transcription of type I IFN genes and IFN-stimulated genes (ISG) by binding to the interferon-stimulated response element (ISRE) in their promoters. Notably, IRF5 efficiently activates both IFN-beta (IFNB) and IFN-alpha (IFNA) genes, mediating their induction through the TLR-activated, MyD88-dependent pathway. Particularly relevant in the context of SARS-CoV-2 infection, IRF5 stands out as a significant transcriptional regulator of the IFN response. Maintained as a monomer in an autoinhibited state, its activation involves phosphorylation facilitated by the innate adapter protein TASL, which recruits IRF5, licensing it for phosphorylation by IKBKB. Subsequent steps involve the dissociation of phosphorylated IRF5 from adapter proteins, its dimerization, and nuclear entry to induce IFNs.

Human

E. coli

C-6*His

Q13568-1 (M1-Q498)

3663  [NCBI]

MNQSIPVAPTPPRRVRLKPWLVAQVNSCQYPGLQWVNGEKKLFCIPWRHATRHGPSQDGDNTIFKAWAKETGKYTEGVDEADPAKWKANLRCALNKSRDFRLIYDGPRDMPPQPYKIYEVCSNGPAPTDSQPPEDYSFGAGEEEEEEEELQRMLPSLSLTEDVKWPPTLQPPTLRPPTLQPPTLQPPVVLGPPAPDPSPLAPPPGNPAGFRELLSEVLEPGPLPASLPPAGEQLLPDLLISPHMLPLTDLEIKFQYRGRPPRALTISNPHGCRLFYSQLEATQEQVELFGPISLEQVRFPSPEDIPSDKQRFYTNQLLDVLDRGLILQLQGQDLYAIRLCQCKVFWSGPCASAHDSCPNPIQREVKTKLFSLEHFLNELILFQKGQTNTPPPFEIFFCFGEEWPDRKPREKKLITVQVVPVAARLLLEMFSGELSWSADSIRLQISNPDLKDRMVEQFKELHHIWQSQQRLQPVAQAPPGAGLGVGQGPWPMHPAGMQ

Approximately 58.0 kDa

Greater than 95% as determined by reducing SDS-PAGE.

Solution

Supplied as a 0.2 μm filtered solution of 20 mM Tris-HCl, 150 mM NaCl, 30% Glycerol, 1 mM DTT, pH 8.0.

<1 EU/μg, determined by LAL method.

Stored at -80°C for 1 year. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.