Summary for IRF-3 (NES ID: 38)

Full Name
Interferon regulatory factor 3     UniProt    
Alternative Names
None
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Direct triggering of the type I interferon system by virus infection: activation of a transcription factor complex containing IRF-3 and CBP/p300, Yoneyama et al., EMBO J, 1998
Mutations That Affect Nuclear Export
Unknown
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
136QEDILDELLGNMVLA150 Ref.1Direct triggering of the type I interferon system by virus infection: activation of a transcription factor complex containing IRF-3 and CBP/p300, Yoneyama et al., EMBO J, 1998
Secondary Structure of Export Signal
Unknown
Other Residues Important for Export
Unknown
Sequence
Show FASTA Format Show Domain Info by CDD Show Secondary Structure by PSIPRED Show Conservation Score by AL2CO 
        10         20         30         40         50         60 
MGTPKPRILP WLVSQLDLGQ LEGVAWVNKS RTRFRIPWKH GLRQDAQQED FGIFQAWAEA 

        70         80         90        100        110        120 
TGAYVPGRDK PDLPTWKRNF RSALNRKEGL RLAEDRSKDP HDPHKIYEFV NSGVGDFSQP 

       130        140        150        160        170        180 
DTSPDTNGGG STSDTQEDIL DELLGNMVLA PLPDPGPPSL AVAPEPCPQP LRSPSLDNPT 

       190        200        210        220        230        240 
PFPNLGPSEN PLKRLLVPGE EWEFEVTAFY RGRQVFQQTI SCPEGLRLVG SEVGDRTLPG 

       250        260        270        280        290        300 
WPVTLPDPGM SLTDRGVMSY VRHVLSCLGG GLALWRAGQW LWAQRLGHCH TYWAVSEELL 

       310        320        330        340        350        360 
PNSGHGPDGE VPKDKEGGVF DLGPFIVDLI TFTEGSGRSP RYALWFCVGE SWPQDQPWTK 

       370        380        390        400        410        420 
RLVMVKVVPT CLRALVEMAR VGGASSLENT VDLHISNSHP LSLTSDQYKA YLQDLVEGMD 

                                                                  
FQGPGES
3D Structures in PDB
Not Available
Comments
IRF-3 is a possible candidate for the virus-induced activation of a set of cellular genes including IFN (type I interferons). Yoneyama et al. examined the localization of IRF-3 and found that in uninduced cells, IRF-3 is localized in the cytoplasm. Upon virus ifection, the serines of IRF-3 were phosphorylated and IRF-3 translocates to the nucleus. By deletion assay, they found that aa 129-190 are responsible for its cytoplasmic localization. When a reporter protein (ovalbumin)is fused to aa 136-150. The conjugate was exported to the cytoplasm. Mutations of I139/L140/L143/L144/M147/V148/L149, or LMB treatment (data not published) abolished the export. They also showed that mutations I139/L140/L143/L144 will localize the protein to the nucleus. NOTE that the NES peptide used in fusion study is different from the full length at residue 136. Instead of Q, it becomes a C in the fusion peptide. They demonstrated that aa 58-427 is sufficient to confer a responsiveness to the virus signal induction.
References
[1]. "Direct triggering of the type I interferon system by virus infection: activation of a transcription factor complex containing IRF-3 and CBP/p300"
Yoneyama, M., Suhara, W., Fukuhara, Y., Fukuda, M., Nishida, E., Fujita, T. (1998) EMBO J, 17:1087-1095 PubMed
User Input
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