IRF3

gene
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Summary

IRF3 (interferon regulatory factor 3, HGNC:6118) is a protein-coding gene on chromosome 19q13.33, encoding Interferon regulatory factor 3 (Q14653). 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.

This gene encodes a member of the interferon regulatory transcription factor (IRF) family. The encoded protein is found in an inactive cytoplasmic form that upon serine/threonine phosphorylation forms a complex with CREBBP. This complex translocates to the nucleus and activates the transcription of interferons alpha and beta, as well as other interferon-induced genes. The protein plays an important role in the innate immune response against DNA and RNA viruses. Mutations in this gene are associated with Encephalopathy, acute, infection-induced, herpes-specific, 7.

Source: NCBI Gene 3661 — RefSeq curated summary.

At a glance

  • Gene–disease (curated): herpes simplex encephalitis, susceptibility to, 7 (Moderate, GenCC)
  • GWAS associations: 3
  • Clinical variants (ClinVar): 110 total — 1 likely-pathogenic
  • Phenotypes (HPO): 7
  • Druggable target: yes
  • Transcription factor: yes — 89 downstream targets (CollecTRI)
  • MANE Select transcript: NM_001571

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:6118
Approved symbolIRF3
Nameinterferon regulatory factor 3
Location19q13.33
Locus typegene with protein product
StatusApproved
Ensembl geneENSG00000126456
Ensembl biotypeprotein_coding
OMIM603734
Entrez3661

Gene structure

Transcript identifiers

Ensembl transcripts: 40 — 30 protein_coding, 4 retained_intron, 3 nonsense_mediated_decay, 3 protein_coding_CDS_not_defined

ENST00000309877, ENST00000377139, ENST00000442265, ENST00000593337, ENST00000593818, ENST00000593922, ENST00000594387, ENST00000595034, ENST00000595240, ENST00000596644, ENST00000596756, ENST00000596765, ENST00000596788, ENST00000596822, ENST00000597180, ENST00000597198, ENST00000597369, ENST00000597636, ENST00000598108, ENST00000598808, ENST00000599144, ENST00000599223, ENST00000599680, ENST00000600022, ENST00000600453, ENST00000600911, ENST00000601291, ENST00000601373, ENST00000601809, ENST00000602190, ENST00000890747, ENST00000890748, ENST00000890749, ENST00000890750, ENST00000890751, ENST00000921360, ENST00000921361, ENST00000921362, ENST00000942552, ENST00000942553

RefSeq mRNA: 8 — MANE Select: NM_001571 NM_001197122, NM_001197123, NM_001197124, NM_001197125, NM_001197126, NM_001197127, NM_001197128, NM_001571

CCDS: CCDS12775, CCDS56099, CCDS59407, CCDS59408, CCDS59409

Canonical transcript exons

ENST00000377139 — 8 exons

ExonStartEnd
ENSE000022242114966194849662328
ENSE000034682874965957249659833
ENSE000035128404966318849663258
ENSE000036522444966242549662617
ENSE000036568144966334349663514
ENSE000036710304966071349660828
ENSE000036867824966467449664846
ENSE000038493264966563149665857

Expression profiles

Bgee: expression breadth ubiquitous, 266 present calls, max score 98.94.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 21.9312 / max 120.3700, expressed in 1810 samples.

FANTOM5 promoters (4 alternative TSS)

Promoter IDTPM avgSamples expressed
18207013.61321789
1820695.61571614
1820671.6385669
1820681.0637577

Top tissues by expression

289 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
granulocyteCL:000009498.94gold quality
right uterine tubeUBERON:000130298.14gold quality
lower esophagus mucosaUBERON:003583497.80gold quality
mucosa of transverse colonUBERON:000499197.71gold quality
spleenUBERON:000210697.46gold quality
right lobe of thyroid glandUBERON:000111997.44gold quality
endocervixUBERON:000045897.28gold quality
small intestine Peyer’s patchUBERON:000345497.27gold quality
left lobe of thyroid glandUBERON:000112097.26gold quality
adenohypophysisUBERON:000219697.08gold quality
lymph nodeUBERON:000002996.92gold quality
ectocervixUBERON:001224996.78gold quality
body of stomachUBERON:000116196.76gold quality
body of pancreasUBERON:000115096.75gold quality
metanephros cortexUBERON:001053396.72gold quality
left uterine tubeUBERON:000130396.65gold quality
right ovaryUBERON:000211896.64gold quality
skin of abdomenUBERON:000141696.49gold quality
left ovaryUBERON:000211996.49gold quality
body of uterusUBERON:000985396.48gold quality
transverse colonUBERON:000115796.46gold quality
minor salivary glandUBERON:000183096.41gold quality
thyroid glandUBERON:000204696.33gold quality
skin of legUBERON:000151196.20gold quality
pituitary glandUBERON:000000796.16gold quality
right lobe of liverUBERON:000111496.16gold quality
olfactory segment of nasal mucosaUBERON:000538696.15gold quality
small intestineUBERON:000210895.95gold quality
right adrenal glandUBERON:000123395.87gold quality
upper lobe of left lungUBERON:000895295.84gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 1.

ExperimentMarker?Max mean expression
E-MTAB-7606no1687.70
E-ANND-3no0.00

Regulation

Is transcription factor: yes

Downstream targets (CollecTRI)

89 targets.

TargetRegulation
ABCC2Activation
ADAM2
AKT1
CCL19Activation
CCL2Unknown
CCL3Repression
CCL5Unknown
CDK2
CDK4
CDKN1AUnknown
CHUK
CISH
CREBBP
CTNNB1
CXCL1Unknown
CXCL10Activation
CXCL14
CXCL8Activation
DDX3X
FGFR1
GPR146Activation
IFIT1Activation
IFIT2Activation
IFN1@
IFNA1Activation
IFNA14Activation
IFNA16
IFNA17
IFNA2Activation
IFNA4Activation

JASPAR motifs

MotifNameFamily
MA1418.1IRF3Interferon-regulatory factors
MA1418.2IRF3Interferon-regulatory factors

JASPAR matrix evidence (PMIDs): PMID:10938111

Upstream regulators (CollecTRI, top): AHR, CDH8, E2F1, IRF3, IRF4, IRF7, LYAR, MYC, NFKB, NRF1, SP1, SP3, ZNF143

Literature-anchored findings (GeneRIF, showing 40)

  • human interferon regulatory factor-3 (IRF-3) gene promoter contains a functional SPH element that is bound by SBF/Staf in vitro and in transfected cells (PMID:11724783)
  • Preferential binding sites for interferon regulatory factors 3 and 7 involved in interferon-A gene transcription (PMID:11884139)
  • IRF-3 recognizes nucleocapsid structures during measles virus infections and triggers induction of interferon production (PMID:11907205)
  • Direct involvement of CREB-binding protein/p300 in sequence-specific DNA binding of virus-activated interferon regulatory factor-3 holocomplex. (PMID:11940575)
  • IRF-3-dependent, NFkappa B- and JNK-independent activation of the 561 and IFN-beta genes in response to double-stranded RNA (PMID:11972054)
  • IRF3 mediates a TLR3/TLR4-specific antiviral gene program. (PMID:12354379)
  • IRF3 binds to p300/CBP and acts as a transcription factor (PMID:12473110)
  • Ser(396) within the C-terminal Ser/Thr cluster is targeted in vivo for phosphorylation following virus infection and plays an essential role in IRF-3 activation (PMID:12524442)
  • hIRF3 inhibited cell growth, blocked DNA synthesis, and induced apoptosis, while a dominant negative mutant transformed 3T3 cells, implying that IRF3 may function as a tumor suppressor and its dominant negative mutant may have a role in tumorigenesis. (PMID:12582166)
  • IKKepsilon and TBK1 have a pivotal role in coordinating the activation of IRF3 and NF-kappaB in the innate immune response. (PMID:12692549)
  • In Ebola virus-infected cells, VP35 inhibits the induction of antiviral genes, including the IFN-beta gene, by blocking IRF-3 activation (PMID:12829834)
  • Bunyamwera (BUN) NSs protein can delay cell death in the early stages of BUN infection by inhibiting IRF-3-mediated apoptosis. (PMID:12829839)
  • LPS-TLR4 signaling to IRF-3/7 and NF-kappaB involves the toll adapters TRAM and TRIF. (PMID:14517278)
  • p65 promoted transactivation of gene expression by IRF-3; a dominant negative form of I kappa B kinase 2 and a mutant form of I kappa B, which acts as a super-repressor of NF-kappa B, blocked activation of the ISRE (PMID:14557267)
  • Ser-386 is the target of the IRF-3 kinase and critical determinant for the activation of IRF-3 (PMID:14703513)
  • herpes simplex virus ICP0 blocks interferon regulatory factor IRF3-mediated activation of interferon-stimulated genes; the RING finger domain of ICP0 is essential for this activity (PMID:14747533)
  • enveloped particles from RNA and DNA viruses induce interferon-stimulated genes (ISGs) in the absence of IFN production and virus replication through activation of IRF3 (PMID:14747536)
  • double-stranded RNA-induced TLR3/TRIF-mediated NF-kappaB and IRF3 activation diverge at TRIF (PMID:14982987)
  • IRF3 activities are essential for the initiation of transcription of the IFNbeta gene (PMID:15107417)
  • activated by West Nile Virus (WNV)infection. Irf-3 target genes function to constrain WNV infection and limit cell-to-cell virus spread. (PMID:15220448)
  • Cytomegalovirus pp65 prevents activation of IRF-3, a primary mediator of the type I interferon response. (PMID:15452220)
  • NF-kappaB and interferon regulatory factor, the two major transcription factors activated by virus infection, were essential for the induction of two sets of genes by Sendai virus (PMID:15767394)
  • activation inhibited by Rabies virus P protein (PMID:15919920)
  • ArgII gene is an early IRF-3-regulated gene, which participates in the interferon-independent antiviral response through polyamine production and induction of apoptosis. (PMID:15955070)
  • JEV and DEN-2 initiate the host innate immune response through a molecular mechanism involving RIG-I/IRF-3 and PI3K/NF-kappaB signaling pathways (PMID:16182584)
  • Expression of IKK-i can activate both NFkappaB and IRF3, leading to the production of several cytokines including interferon beta. (PMID:16199137)
  • The present study identified a specific interaction between IRF3 and chaperone heat-shock protein of 90 kDa (Hsp90).In addition, TBK1 is found to be a client protein of Hsp90 in vivo. (PMID:16394098)
  • West Nile virus avoids IRF3 pathway through RIG-1 dependent and independent pathways early in infection when it is most sensitive to host cell defenses (PMID:16501100)
  • IRF3 induces cell growth inhibition and cellular senescence through activation of p53 tumor suppressor (PMID:16513254)
  • belongs to one signaling pathway that mediates induction of gene expression, which, in concert, mediates proliferative activity toward endothelial cells (PMID:16537515)
  • HCV infection transiently induces RIG-I- and IPS-1-dependent IRF-3 activation (PMID:16585524)
  • expression of the LCMV nucleoprotein (NP) is sufficient to inhibit both IFN production and nuclear translocation of IRF-3 (PMID:16940530)
  • IPS-1, IRF3, and IFNbeta have critical roles in Legionella infection of lung epithelium (PMID:16984921)
  • IRF-3 is a key molecule controlling HCV replication through modulation of host interferon gene responses. (PMID:16988763)
  • Transduction of active forms of IRF-3 or IRF-7 differentially modulate the apoptotic and antitumor properties of primary macrophages. (PMID:17079482)
  • hypothesized that HSV-1 ICP0 recruits activated IRF-3 & CBP/p300 to nuclear structures, away from host chromatin; this leads to inactivation & accelerated degradation of IRF-3, resulting in reduced transcription of IFN-beta & inhibition of host response (PMID:17126870)
  • Both the cytoplasmic and TLR3-mediated dsRNA recognition pathways converge upon NAP1 for the activation of the IRF-3 and IFN-beta promoter. (PMID:17142768)
  • ability of bICP0 to reduce IRF3 protein levels is important with respect to disarming the interferon response during productive infection (PMID:17215277)
  • proteasome dependent IRF3 degradation in rotavirus infected cells is dependent on the presence of rotavirus NSP1 and the integrity of the N-terminal zinc-binding domain. (PMID:17251580)
  • Antiviral gene expression in RA, especially due to TLR ligands and TNFalpha, is dependent on IKKepsilon and IRF-3, and this pathway plays a key role in the production of type I IFNs and chemokines such as RANTES. (PMID:17328045)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_rerioirf3ENSDARG00000076251
mus_musculusIrf3ENSMUSG00000003184
rattus_norvegicusIrf3ENSRNOG00000043388

Paralogs (8): IRF6 (ENSG00000117595), IRF1 (ENSG00000125347), IRF5 (ENSG00000128604), IRF4 (ENSG00000137265), IRF8 (ENSG00000140968), IRF2 (ENSG00000168310), IRF7 (ENSG00000185507), IRF9 (ENSG00000213928)

Protein

Protein identifiers

Interferon regulatory factor 3Q14653 (reviewed: Q14653)

All UniProt accessions (14): Q14653, M0QX56, M0QXC8, M0QYT9, M0QYX3, M0QZB7, M0QZB8, M0R007, M0R0R8, M0R0X9, M0R205, M0R3C2, M0R3E9, M0R3H7

UniProt curated annotations — full annotation on UniProt →

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.

Subunit / interactions. Monomer. Homodimer; phosphorylation-induced. Interacts (when phosphorylated) with CREBBP. Interacts with MAVS (via phosphorylated pLxIS motif). Interacts with TICAM1 (via phosphorylated pLxIS motif). Interacts with STING1 (via phosphorylated pLxIS motif). Interacts with IKBKE and TBK1. Interacts with TICAM2. Interacts with RBCK1. Interacts with HERC5. Interacts with DDX3X (phosphorylated at ‘Ser-102’); the interaction allows the phosphorylation and activation of IRF3 by IKBKE. Interacts with TRIM21 and ULK1, in the presence of TRIM21; this interaction leads to IRF3 degradation by autophagy. Interacts with RIOK3; RIOK3 probably mediates the interaction of TBK1 with IRF3. Interacts with ILRUN; the interaction inhibits IRF3 binding to its DNA consensus sequence. Interacts with LYAR; this interaction impairs IRF3 DNA-binding activity. Interacts with TRAF3. Interacts with ZDHHC11; ZDHHC11 recruits IRF3 to STING1 upon DNA virus infection and thereby promotes IRF3 activation. Interacts with HSP90AA1; the interaction mediates IRF3 association with TOMM70. Interacts with BCL2; the interaction decreases upon Sendai virus infection. Interacts with BAX; the interaction is direct, increases upon Sendai virus infection and mediates the formation of the apoptosis complex TOMM70:HSP90AA1:IRF3:BAX. Interacts with DDX56. Interacts with NBR1. (Microbial infection) Interacts with rotavirus A NSP1 (via pLxIS motif); this interaction leads to the proteasome-dependent degradation of IRF3. (Microbial infection) Interacts with herpes virus 8/HHV-8 protein VIRF1. (Microbial infection) Interacts with Seneca Valley virus protease 3C; this interaction is involved in the suppression of IRF3 expression and phosphorylation by the virus. (Microbial infection) Interacts with herpes virus 2/HHV-2 protein ICP27; this interaction inhibits IRF3 phosphorylation and nuclear translocation. (Microbial infection) Interacts with human cytomegalovirus protein UL44; this interaction prevents IRF3 binding to its promoters. (Microbial infection) Interacts with the two fragments of MERS-COV protein N produced by CASP6 through proteolytic cleavage; both interactions inhibit IRF3 nuclear translocation after activation and IFN signaling.

Subcellular location. Cytoplasm. Nucleus. Mitochondrion.

Tissue specificity. Expressed constitutively in a variety of tissues.

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. Phosphorylation of IRF3 at Ser-385 and Ser-386 plays an important role in the PBLD-triggered IFN-I cascade. 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. Deamidation of Asn-85 by CTPS1 prevents IRF3 from binding DNA, thereby inhibiting the transcription factor activity. 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.

Disease relevance. Encephalopathy, acute, infection-induced, 7, herpes-specific (IIAE7) [MIM:616532] A rare complication of human herpesvirus 1 (HHV-1) infection, occurring in only a small minority of HHV-1 infected individuals. It is characterized by hemorrhagic necrosis of parts of the temporal and frontal lobes. Onset is over several days and involves fever, headache, seizures, stupor, and often coma, frequently with a fatal outcome. Disease susceptibility is associated with variants affecting the gene represented in this entry.

Activity regulation. In the absence of viral infection, maintained as a monomer in an autoinhibited state. Phosphorylation by TBK1 and IKBKE disrupts this autoinhibition leading to the liberation of the DNA-binding and dimerization activities and its nuclear localization where it can activate type I IFN and ISG genes. Phosphorylation and activation follow the following steps: 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 their pLxIS motif, leading to recruitment of IRF3, thereby licensing IRF3 for phosphorylation by TBK1. Phosphorylated IRF3 dissociates from the adapter proteins, dimerizes, and then enters the nucleus to induce IFNs. (Microbial infection) Activated upon coronavirus SARS-CoV-2 infection.

Similarity. Belongs to the IRF family.

Isoforms (5)

UniProt IDNamesCanonical?
Q14653-11yes
Q14653-22
Q14653-33
Q14653-44
Q14653-55

RefSeq proteins (8): NP_001184051, NP_001184052, NP_001184053, NP_001184054, NP_001184055, NP_001184056, NP_001184057, NP_001562* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR001346Interferon_reg_fact_DNA-bd_domDomain
IPR008984SMAD_FHA_dom_sfHomologous_superfamily
IPR017855SMAD-like_dom_sfHomologous_superfamily
IPR019471Interferon_reg_factor-3Domain
IPR019817Interferon_reg_fac_CSConserved_site
IPR036388WH-like_DNA-bd_sfHomologous_superfamily
IPR036390WH_DNA-bd_sfHomologous_superfamily

Pfam: PF00605, PF10401

UniProt features (112 total): strand 27, mutagenesis site 23, modified residue 20, helix 12, sequence variant 10, splice variant 5, region of interest 3, cross-link 3, site 2, chain 1, DNA-binding region 1, disulfide bond 1, short sequence motif 1, compositionally biased region 1, sequence conflict 1, turn 1

Structure

Experimental structures (PDB)

18 structures.

PDBMethodResolution (Å)
6SJAX-RAY DIFFRACTION1.5
5JELX-RAY DIFFRACTION1.6
7JFLX-RAY DIFFRACTION1.68
5JEOX-RAY DIFFRACTION1.72
6SIVX-RAY DIFFRACTION1.75
3A77X-RAY DIFFRACTION1.8
5JEJX-RAY DIFFRACTION2
1QWTX-RAY DIFFRACTION2.1
1J2FX-RAY DIFFRACTION2.3
3QU6X-RAY DIFFRACTION2.3
2PI0X-RAY DIFFRACTION2.31
1ZOQX-RAY DIFFRACTION2.37
5JEKX-RAY DIFFRACTION2.4
5JEMX-RAY DIFFRACTION2.5
2O61X-RAY DIFFRACTION2.8
5JERX-RAY DIFFRACTION2.91
1T2KX-RAY DIFFRACTION3
2O6GX-RAY DIFFRACTION3.1

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q14653-F181.580.56

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Catalytic / active sites (2): 121–122 (cleavage; by casp3); 125–126 (cleavage; by casp3)

Post-translational modifications (23): 14, 75, 85, 97, 123, 175, 180, 188, 237, 244, 253, 366, 385, 386, 386, 396, 398, 404, 427, 193 …

Disulfide bonds (1): 267–289

Mutagenesis-validated functional residues (23):

PositionPhenotype
77–78abolishes nuclear localization.
86–87no effect on subcellular localization.
116does not affect cleavage by casp3.
121–125abolished cleavage by casp3.
139–140abolishes nuclear export.
193highly diminished isgylation; when associated with r-360 and r-366.
285abolished interaction with sting1, mavs or ticam1.
288decreased interaction with ticam1.
290decreased interaction with ticam1.
313abolished interaction with sting1, mavs or ticam1.
360highly diminished isgylation; when associated with r-193 and r-366.
366highly diminished isgylation; when associated with r-193 and r-360.
385–386complete loss of viral infection induced phosphorylation.
385complete loss of viral infection induced phosphorylation.
385abolishes pbld-induced ifnb, isg15 and ifitm3 expression during virus infection; when associated with a-386.
386complete loss of viral infection induced phosphorylation. abolished pyrophosphorylation. abolishes pbld-induced ifnb, is
386phosphomimetic mutant; interacts with crebbp; when associated with e-396.
390does not affect pyrophosphorylation.
396–405complete loss of viral infection induced phosphorylation.
396–405acts as a constitutively activated irf3.
396–398complete loss of viral infection induced phosphorylation.
396phosphomimetic mutant; interacts with crebbp; when associated with e-386.
402–405complete loss of viral infection induced phosphorylation.

Function

Pathways and Gene Ontology

Reactome pathways

39 pathways

IDPathway
R-HSA-1169408ISG15 antiviral mechanism
R-HSA-1606341IRF3 mediated activation of type 1 IFN
R-HSA-168928DDX58/IFIH1-mediated induction of interferon-alpha/beta
R-HSA-3134973LRR FLII-interacting protein 1 (LRRFIP1) activates type I IFN production
R-HSA-3134975Regulation of innate immune responses to cytosolic DNA
R-HSA-3270619IRF3-mediated induction of type I IFN
R-HSA-877300Interferon gamma signaling
R-HSA-9013973TICAM1-dependent activation of IRF3/IRF7
R-HSA-909733Interferon alpha/beta signaling
R-HSA-918233TRAF3-dependent IRF activation pathway
R-HSA-933541TRAF6 mediated IRF7 activation
R-HSA-936440Negative regulators of DDX58/IFIH1 signaling
R-HSA-936964Activation of IRF3, IRF7 mediated by TBK1, IKKε (IKBKE)
R-HSA-9692916SARS-CoV-1 activates/modulates innate immune responses
R-HSA-9705671SARS-CoV-2 activates/modulates innate and adaptive immune responses
R-HSA-9833109Evasion by RSV of host interferon responses
R-HSA-1169410Antimicrobial mechanism of IFN-stimulated genes
R-HSA-1280215Cytokine Signaling in Immune system
R-HSA-1606322ZBP1(DAI) mediated induction of type I IFNs
R-HSA-1643685Disease
R-HSA-166016Toll Like Receptor 4 (TLR4) Cascade
R-HSA-166166MyD88-independent TLR4 cascade
R-HSA-168164Toll Like Receptor 3 (TLR3) Cascade
R-HSA-168249Innate Immune System
R-HSA-168256Immune System
R-HSA-168898Toll-like Receptor Cascades
R-HSA-1834941STING mediated induction of host immune responses
R-HSA-1834949Cytosolic sensors of pathogen-associated DNA
R-HSA-5663205Infectious disease
R-HSA-913531Interferon Signaling

MSigDB gene sets: 275 (showing top): REACTOME_DDX58_IFIH1_MEDIATED_INDUCTION_OF_INTERFERON_ALPHA_BETA, GOBP_RESPONSE_TO_NITROGEN_COMPOUND, GOBP_CELLULAR_RESPONSE_TO_VIRUS, REACTOME_INNATE_IMMUNE_SYSTEM, GOBP_POSITIVE_REGULATION_OF_TYPE_I_INTERFERON_PRODUCTION, REACTOME_CYTOKINE_SIGNALING_IN_IMMUNE_SYSTEM, GOBP_INFLAMMATORY_RESPONSE, GOBP_RESPONSE_TO_PEPTIDE, GOBP_CELLULAR_RESPONSE_TO_LIPID, GOBP_CELLULAR_RESPONSE_TO_BIOTIC_STIMULUS, GOBP_CANONICAL_NF_KAPPAB_SIGNAL_TRANSDUCTION, GRAESSMANN_APOPTOSIS_BY_DOXORUBICIN_DN, GRAESSMANN_RESPONSE_TO_MC_AND_DOXORUBICIN_DN, GOBP_RESPONSE_TO_TYPE_I_INTERFERON, GOBP_POSITIVE_REGULATION_OF_CYTOKINE_PRODUCTION

GO Biological Process (41): immune system process (GO:0002376), cytoplasmic pattern recognition receptor signaling pathway (GO:0002753), regulation of transcription by RNA polymerase II (GO:0006357), apoptotic process (GO:0006915), DNA damage response (GO:0006974), mRNA transcription (GO:0009299), lipopolysaccharide-mediated signaling pathway (GO:0031663), positive regulation of type I interferon production (GO:0032481), positive regulation of interferon-alpha production (GO:0032727), positive regulation of interferon-beta production (GO:0032728), toll-like receptor 4 signaling pathway (GO:0034142), TRIF-dependent toll-like receptor signaling pathway (GO:0035666), MDA-5 signaling pathway (GO:0039530), regulation of apoptotic process (GO:0042981), positive regulation of canonical NF-kappaB signal transduction (GO:0043123), positive regulation of transcription by RNA polymerase II (GO:0045944), regulation of inflammatory response (GO:0050727), defense response to virus (GO:0051607), type I interferon-mediated signaling pathway (GO:0060337), positive regulation of type I interferon-mediated signaling pathway (GO:0060340), cellular response to exogenous dsRNA (GO:0071360), macrophage apoptotic process (GO:0071888), programmed necrotic cell death (GO:0097300), cellular response to virus (GO:0098586), antiviral innate immune response (GO:0140374), cGAS/STING signaling pathway (GO:0140896), positive regulation of cytokine production involved in inflammatory response (GO:1900017), negative regulation of transcription by RNA polymerase II (GO:0000122), positive regulation of cytokine production (GO:0001819), regulation of DNA-templated transcription (GO:0006355), cell surface receptor signaling pathway (GO:0007166), response to bacterium (GO:0009617), regulation of gene expression (GO:0010468), programmed cell death (GO:0012501), signal transduction involved in regulation of gene expression (GO:0023019), response to lipopolysaccharide (GO:0032496), response to exogenous dsRNA (GO:0043330), innate immune response (GO:0045087), positive regulation of innate immune response (GO:0045089), positive regulation of DNA-templated transcription (GO:0045893)

GO Molecular Function (15): RNA polymerase II cis-regulatory region sequence-specific DNA binding (GO:0000978), DNA-binding transcription factor activity, RNA polymerase II-specific (GO:0000981), DNA-binding transcription activator activity (GO:0001216), DNA-binding transcription repressor activity, RNA polymerase II-specific (GO:0001227), DNA-binding transcription activator activity, RNA polymerase II-specific (GO:0001228), DNA binding (GO:0003677), DNA-binding transcription factor activity (GO:0003700), protein domain specific binding (GO:0019904), identical protein binding (GO:0042802), protein homodimerization activity (GO:0042803), sequence-specific DNA binding (GO:0043565), sequence-specific double-stranded DNA binding (GO:1990837), promoter-specific chromatin binding (GO:1990841), transcription cis-regulatory region binding (GO:0000976), protein binding (GO:0005515)

GO Cellular Component (6): chromatin (GO:0000785), nucleus (GO:0005634), nucleoplasm (GO:0005654), cytoplasm (GO:0005737), mitochondrion (GO:0005739), cytosol (GO:0005829)

Reactome top-level categories

Rollup of top-13 pathways:

CategoryPathways
Cytosolic sensors of pathogen-associated DNA3
Interferon Signaling3
DDX58/IFIH1-mediated induction of interferon-alpha/beta3
Antimicrobial mechanism of IFN-stimulated genes1
ZBP1(DAI) mediated induction of type I IFNs1
Innate Immune System1
STING mediated induction of host immune responses1
Toll Like Receptor 3 (TLR3) Cascade1
TRIF (TICAM1)-mediated TLR4 signaling1
SARS-CoV-1-host interactions1
SARS-CoV-2-host interactions1
RSV-host interactions1
Immune System1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
RNA polymerase II transcription regulatory region sequence-specific DNA binding4
cellular anatomical structure4
positive regulation of cytokine production2
regulation of DNA-templated transcription2
transcription by RNA polymerase II2
positive regulation of type I interferon production2
regulation of transcription by RNA polymerase II2
positive regulation of DNA-templated transcription2
DNA-binding transcription factor activity2
transcription cis-regulatory region binding2
DNA-binding transcription factor activity, RNA polymerase II-specific2
protein binding2
intracellular membrane-bounded organelle2
cytoplasm2
biological_process1
pattern recognition receptor signaling pathway1
intracellular receptor signaling pathway1
programmed cell death1
apoptotic signaling pathway1
execution phase of apoptosis1
cellular response to stress1
DNA-templated transcription1
mRNA metabolic process1
cell surface receptor signaling pathway1
cellular response to lipopolysaccharide1
regulation of type I interferon production1
type I interferon production1
interferon-alpha production1
regulation of interferon-alpha production1
interferon-beta production1
regulation of interferon-beta production1
cell surface toll-like receptor signaling pathway1
MyD88-independent toll-like receptor signaling pathway1
cytoplasmic pattern recognition receptor signaling pathway1
apoptotic process1
regulation of programmed cell death1
canonical NF-kappaB signal transduction1
regulation of canonical NF-kappaB signal transduction1
positive regulation of intracellular signal transduction1
inflammatory response1

Protein interactions and networks

STRING

3960 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
IRF3TBK1Q9UHD2999
IRF3IKBKEQ14164995
IRF3EP300Q09472992
IRF3JUNP05412992
IRF3CREBBPQ92793989
IRF3IRF7Q92985988
IRF3MAVSQ7Z434987
IRF3TRIM21P19474960
IRF3IFNB1P01574960
IRF3TLR3O15455959
IRF3RIGIO95786959
IRF3IFIH1Q9BYX4938
IRF3IFNA13P01562924
IRF3SH2D3AQ9BRG2920
IRF3MYD88P78397917

IntAct

109 interactions, top by confidence:

ABTypeScore
IRF3IRF3psi-mi:“MI:0915”(physical association)0.970
IRF3IRF3psi-mi:“MI:0407”(direct interaction)0.970
IRF3CREBBPpsi-mi:“MI:0915”(physical association)0.930
IRF3CREBBPpsi-mi:“MI:0407”(direct interaction)0.930
CREBBPIRF3psi-mi:“MI:0914”(association)0.930
CREBBPIRF3psi-mi:“MI:0915”(physical association)0.930
TBK1IRF3psi-mi:“MI:0915”(physical association)0.920
TBK1IRF3psi-mi:“MI:0403”(colocalization)0.920

BioGRID (365): EP300 (Protein-peptide), EP300 (Affinity Capture-Western), IRF3 (Affinity Capture-Western), IRF3 (Reconstituted Complex), IRF3 (Reconstituted Complex), IRF3 (Affinity Capture-Western), IRF3 (Affinity Capture-Western), IRF3 (Biochemical Activity), AKT1 (Affinity Capture-Western), PRDX1 (Two-hybrid), MAVS (Affinity Capture-Western), TBK1 (Affinity Capture-Western), TRAF2 (Affinity Capture-Western), TRAF6 (Affinity Capture-Western), MAVS (Reconstituted Complex)

ESM2 similar proteins: B5DF93, D2HNW6, O14896, P52633, P56477, P70671, P97431, Q08DD6, Q13568, Q14653, Q15561, Q15562, Q1JPG0, Q3B7M3, Q3TC46, Q3ZBK7, Q4JF28, Q4KLN4, Q53GS7, Q58DJ0, Q5DTY9, Q5R8Q4, Q5RAS2, Q62717, Q68DU8, Q6A0A9, Q6DEZ2, Q6NUQ4, Q7L4E1, Q86TB9, Q86UW7, Q86UW9, Q8AVJ1, Q8BK03, Q8BYR5, Q8CDG3, Q8CF97, Q8CID0, Q8HWS3, Q8IY22

Diamond homologs: A0FIN4, O14896, P10914, P14316, P15314, P23570, P23611, P23906, P56477, P70671, P97431, Q00978, Q02556, Q08DD6, Q13568, Q14653, Q15306, Q3SZP0, Q4JF28, Q58DJ0, Q61179, Q64287, Q764M6, Q8R4E0, Q90643, Q90871, Q90876, Q98925, P70434, Q92985, F5HF68

SIGNOR signaling

58 interactions.

AEffectBMechanism
PRKDCup-regulatesIRF3phosphorylation
TBK1“up-regulates activity”IRF3phosphorylation
MAPK8up-regulatesIRF3phosphorylation
IRF3up-regulatesImmune_response
PIN1“down-regulates quantity by destabilization”IRF3binding
IRF3“up-regulates quantity by expression”IFNB1“transcriptional regulation”
IRF3“up-regulates quantity by expression”SOCS2“transcriptional regulation”
IRF3“up-regulates quantity by expression”ABCC2“transcriptional regulation”
NSD3“up-regulates activity”IRF3methylation
MAVS“up-regulates activity”IRF3binding
8a“down-regulates activity”IRF3binding
8b“down-regulates activity”IRF3binding
“Papain-like proteinase”“down-regulates activity”IRF3deubiquitination
“Papain-like proteinase”“down-regulates activity”IRF3binding
N“down-regulates activity”IRF3
3b“down-regulates activity”IRF3
6“down-regulates activity”IRF3
TRIM59“down-regulates activity”IRF3
PPP2CA“down-regulates activity”IRF3dephosphorylation
“Host translation inhibitor nsp1”“down-regulates activity”IRF3
KPNA2“up-regulates activity”IRF3relocalization
BRLF1“down-regulates quantity by repression”IRF3“transcriptional regulation”
BGLF4“down-regulates activity”IRF3phosphorylation
CDH8“up-regulates quantity”IRF3“transcriptional regulation”
RBCK1“down-regulates quantity by destabilization”IRF3polyubiquitination
TRIM26“down-regulates quantity by destabilization”IRF3polyubiquitination
PTEN“up-regulates activity”IRF3dephosphorylation

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 42 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
SARS-CoV-1 activates/modulates innate immune responses540.0×3e-05
DDX58/IFIH1-mediated induction of interferon-alpha/beta537.3×3e-05
SARS-CoV-2 activates/modulates innate and adaptive immune responses1026.2×1e-09
SARS-CoV-2-host interactions517.5×5e-04
SARS-CoV-2 Infection511.8×2e-03
SARS-CoV Infections58.2×6e-03

GO biological processes:

GO termPartnersFoldFDR
positive regulation of type I interferon production781.9×1e-09
positive regulation of interferon-beta production665.3×1e-07
defense response to virus815.4×7e-06
positive regulation of canonical NF-kappaB signal transduction612.1×7e-04
regulation of cell cycle510.4×4e-03
intracellular signal transduction66.3×9e-03

Disease & clinical

Clinical variants and AI predictions

ClinVar

110 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic1
Uncertain significance62
Likely benign23
Benign6

Top pathogenic / likely-pathogenic (1)

Variant IDHGVSClassification
1220535GRCh37/hg19 19q13.33(chr19:50071364-50165942)x1Likely pathogenic

SpliceAI

1318 predictions. Top by Δscore:

VariantEffectΔscore
19:49662420:CTCA:Cdonor_loss1.0000
19:49662421:TCACC:Tdonor_loss1.0000
19:49662422:CAC:Cdonor_loss1.0000
19:49662424:C:CGdonor_loss1.0000
19:49662614:CTTC:Cacceptor_gain1.0000
19:49662615:TTC:Tacceptor_gain1.0000
19:49662616:TC:Tacceptor_gain1.0000
19:49662617:CC:Cacceptor_gain1.0000
19:49662617:CCTGG:Cacceptor_loss1.0000
19:49662618:C:CCacceptor_gain1.0000
19:49662618:CT:Cacceptor_loss1.0000
19:49662619:T:Aacceptor_loss1.0000
19:49662887:C:CAdonor_gain1.0000
19:49663183:CTCA:Cdonor_loss1.0000
19:49663184:TCAC:Tdonor_loss1.0000
19:49663185:CACC:Cdonor_loss1.0000
19:49663186:A:Cdonor_loss1.0000
19:49663187:C:Adonor_loss1.0000
19:49663256:CTC:Cacceptor_gain1.0000
19:49663355:A:ACdonor_gain1.0000
19:49663356:C:CCdonor_gain1.0000
19:49660714:TTG:Tdonor_gain0.9900
19:49660715:TG:Tdonor_gain0.9900
19:49662153:G:Cdonor_gain0.9900
19:49662164:C:Adonor_gain0.9900
19:49662221:T:TAdonor_gain0.9900
19:49662235:TCGG:Tdonor_gain0.9900
19:49662338:G:Tacceptor_gain0.9900
19:49662341:A:Tacceptor_gain0.9900
19:49662343:C:CTacceptor_gain0.9900

AlphaMissense

2763 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
19:49663449:C:AK77N0.999
19:49663449:C:GK77N0.999
19:49663441:A:GF80S0.998
19:49663450:T:GK77T0.998
19:49664727:A:GW38R0.998
19:49664727:A:TW38R0.998
19:49663509:C:AW57C0.997
19:49663509:C:GW57C0.997
19:49663511:A:GW57R0.997
19:49663511:A:TW57R0.997
19:49664677:G:CF54L0.997
19:49664677:G:TF54L0.997
19:49664679:A:GF54L0.997
19:49664725:C:AW38C0.997
19:49664725:C:GW38C0.997
19:49664738:A:GF34S0.997
19:49663451:T:CK77E0.996
19:49663365:T:AK105N0.995
19:49663365:T:GK105N0.995
19:49663450:T:AK77M0.995
19:49663454:A:GW76R0.994
19:49663454:A:TW76R0.994
19:49664719:G:CH40Q0.994
19:49664719:G:TH40Q0.994
19:49664722:C:AK39N0.994
19:49664722:C:GK39N0.994
19:49664737:G:CF34L0.994
19:49664737:G:TF34L0.994
19:49664739:A:GF34L0.994
19:49663438:C:GR81P0.993

dbSNP variants (sampled 300 via entrez): RS1000060931 (19:49665657 G>A,C,T), RS1000090313 (19:49665715 C>G), RS1000505753 (19:49663635 A>G), RS1001101629 (19:49665031 C>T), RS1001282160 (19:49665532 G>A), RS1001282847 (19:49659515 C>T), RS1002002215 (19:49661231 C>T), RS1002530853 (19:49665247 A>G), RS1002619985 (19:49664396 T>C,G), RS1003118991 (19:49660373 T>C), RS1003414486 (19:49660215 A>G,T), RS1003537960 (19:49663772 T>G), RS1003565805 (19:49664039 G>A,C), RS1004004358 (19:49660931 C>T), RS1004024873 (19:49666151 C>G,T)

Disease associations

OMIM: gene MIM:603734 | disease phenotypes: MIM:616532, MIM:616056

GenCC curated gene-disease

DiseaseClassificationInheritance
herpes simplex encephalitis, susceptibility to, 7ModerateAutosomal dominant

Mondo (2): herpes simplex encephalitis, susceptibility to, 7 (MONDO:0014680), developmental and epileptic encephalopathy, 26 (MONDO:0014477)

Orphanet (2): Herpes simplex virus encephalitis (Orphanet:1930), Non-specific early-onset epileptic encephalopathy (Orphanet:442835)

HPO phenotypes

7 total (7 of 7 shown, HPO-id order):

HPOTerm
HP:0000006Autosomal dominant inheritance
HP:0001250Seizure
HP:0002315Headache
HP:0003621Juvenile onset
HP:0012302Herpes simplex encephalitis
HP:0031179Nuchal rigidity
HP:0200149CSF lymphocytic pleiocytosis

GWAS associations

3 associations (top):

StudyTraitp-value
GCST004785_16Vitiligo2.000000e-09
GCST006803_99Schizophrenia4.000000e-11
GCST010571_75Autoimmune thyroid disease4.000000e-11

Drugs & pharmacology

Drug and pharmacology data

Is drug target: yes

ChEMBL targets (1): CHEMBL4523293 (SINGLE PROTEIN)

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

57 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
Poly I-Cincreases phosphorylation, affects reaction, affects localization, decreases reaction, affects cotreatment (+1 more)4
Air Pollutantsaffects cotreatment, increases abundance, increases expression, increases phosphorylation3
Particulate Matterincreases abundance, increases expression, increases phosphorylation, affects cotreatment3
lipopolysaccharide, E coli O55-B5increases activity, increases phosphorylation2
Vehicle Emissionsaffects cotreatment, increases expression, affects localization2
Cannabidiolincreases expression, affects cotreatment, affects localization, decreases reaction2
Lipopolysaccharidesaffects cotreatment, affects localization, increases phosphorylation, decreases expression, decreases reaction (+1 more)2
Dronabinolaffects cotreatment, affects localization, decreases reaction, increases localization, decreases expression2
aristolochic acid Idecreases expression1
PAM2-CSK4affects reaction, increases expression1
triphenyl phosphateaffects expression1
alpha-pineneincreases abundance, affects cotreatment, increases expression1
2,2’-methylenebis(4-methyl-6-tert-butylphenol)affects response to substance, affects expression1
beta-lapachonedecreases expression1
mono-(2-ethylhexyl)phthalateincreases expression1
nickel chloridedecreases expression, decreases reaction1
benzo(e)pyreneincreases methylation1
phenyl-N-tert-butylnitroneincreases phosphorylation, decreases reaction1
coumarinincreases phosphorylation1
2-chloroethyl ethyl sulfideincreases expression1
methacrylaldehydeaffects cotreatment, increases expression, increases abundance1
cyanoginosin LRincreases expression, increases phosphorylation1
di-n-butylphosphoric acidaffects expression1
2,3’,4,4’,5-pentachlorobiphenyldecreases reaction, increases response to substance, affects cotreatment, affects localization, increases phosphorylation (+1 more)1
esculentoside Aincreases phosphorylation1
FSL-1 lipoprotein, syntheticaffects reaction, increases expression1
abrineincreases expression1
Pam(3)CSK(4) peptideaffects reaction, increases expression1
Antineoplastic Agents, Immunologicaldecreases response to substance, increases expression1
Sunitinibdecreases expression1

ChEMBL screening assays

7 unique, capped per target: 7 binding

Representative assays (with source publication via chembl_document):

Assay IDTypeDescriptionSource paper
CHEMBL4325122BindingInduction of IRF3 pathway in STING knockout human THP1 cells measured after 20 hrs by luciferase reporter gene assayDesign, Synthesis, and Biological Evaluation of Amidobenzimidazole Derivatives as Stimulator of Interferon Genes (STING) Receptor Agonists. — J Med Chem

Cellosaurus cell lines

13 cell lines: 8 cancer cell line, 3 embryonic stem cell, 1 induced pluripotent stem cell, 1 transformed cell line

First 10 cell lines (id-ordered, not curated):

CellosaurusNameCategorySex
CVCL_A0MCAUi001-AInduced pluripotent stem cellFemale
CVCL_A3F6SEES3-1V human IRF3, clone1Embryonic stem cellMale
CVCL_A3F7SEES3-1V human IRF3, clone2Embryonic stem cellMale
CVCL_A3F8SEES3-1V human IRF3, clone3Embryonic stem cellMale
CVCL_A8AVTHP1-Dual KO-IRF3Cancer cell lineMale
CVCL_B1G2Abcam A-549 IRF3 KO 2Cancer cell lineMale
CVCL_B1UPAbcam HeLa IRF3 KOCancer cell lineFemale
CVCL_B2NKAbcam A-549 IRF3 KO 1Cancer cell lineMale
CVCL_C0N2HEK293-IRF3Transformed cell lineFemale
CVCL_D7SHUbigene A-549 IRF3 KOCancer cell lineMale

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.