ID ICP27_VZVD Reviewed; 452 AA. AC P09269; DT 01-JUL-1989, integrated into UniProtKB/Swiss-Prot. DT 01-JUL-1989, sequence version 1. DT 19-FEB-2014, entry version 59. DE RecName: Full=mRNA export factor ICP27 homolog; DE AltName: Full=Immediate-early protein 4; DE Short=IE4; DE AltName: Full=Transcriptional transactivator IE4; GN ORFNames=ORF4; OS Varicella-zoster virus (strain Dumas) (HHV-3) (Human herpesvirus 3). OC Viruses; dsDNA viruses, no RNA stage; Herpesvirales; Herpesviridae; OC Alphaherpesvirinae; Varicellovirus. OX NCBI_TaxID=10338; OH NCBI_TaxID=9606; Homo sapiens (Human). RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RX PubMed=3018124; RA Davison A.J., Scott J.E.; RT "The complete DNA sequence of varicella-zoster virus."; RL J. Gen. Virol. 67:1759-1816(1986). RN [2] RP FUNCTION. RX PubMed=9261438; RA Defechereux P., Debrus S., Baudoux L., Rentier B., Piette J.; RT "Varicella-zoster virus open reading frame 4 encodes an immediate- RT early protein with posttranscriptional regulatory properties."; RL J. Virol. 71:7073-7079(1997). RN [3] RP INTERACTION WITH IE62. RX PubMed=10873781; DOI=10.1006/viro.2000.0389; RA Spengler M.L., Ruyechan W.T., Hay J.; RT "Physical interaction between two varicella zoster virus gene RT regulatory proteins, IE4 and IE62."; RL Virology 272:375-381(2000). RN [4] RP SUBUNIT. RX PubMed=10889190; DOI=10.1074/jbc.M001444200; RA Baudoux L., Defechereux P., Rentier B., Piette J.; RT "Gene activation by Varicella-zoster virus IE4 protein requires its RT dimerization and involves both the arginine-rich sequence, the central RT part, and the carboxyl-terminal cysteine-rich region."; RL J. Biol. Chem. 275:32822-32831(2000). RN [5] RP FUNCTION, AND INTERACTION WITH HUMAN SRSF1; SRSF3; SRSF7 AND SRPK1. RC STRAIN=NIK; RX PubMed=19924249; DOI=10.1371/journal.pone.0007882; RA Ote I., Lebrun M., Vandevenne P., Bontems S., Medina-Palazon C., RA Manet E., Piette J., Sadzot-Delvaux C.; RT "Varicella-zoster virus IE4 protein interacts with SR proteins and RT exports mRNAs through the TAP/NXF1 pathway."; RL PLoS ONE 4:E7882-E7882(2009). CC -!- FUNCTION: Multifunctional regulator of the expression of viral CC genes that mediates nuclear export of viral intronless mRNAs. This CC immediate early (EI) protein promotes the nuclear export of viral CC intronless mRNAs by interacting with mRNAs and host NXF1/TAP (By CC similarity). CC -!- SUBUNIT: Homodimer. Homodimerization is required for CC transactivation. Associates in a complex with RNA, and host export CC factors NXF1/TAP and ALYREF; these interactions allow nuclear CC export of viral transcripts. Interacts with three host shuttling CC SR proteins SRSF1, SRSF3 and SRSF7. Interacts with host SRPK1. CC Interacts with IE62; this interaction enhances IE62 CC transactivation. CC -!- SUBCELLULAR LOCATION: Host cytoplasm (By similarity). Host nucleus CC (By similarity). Note=Shuttles between the nucleus and the CC cytoplasm (Probable). IE4 utilizes, at least, XPO1/CRM1 as a CC cofactor for nuclear export. CC -!- DOMAIN: Binds viral intronless RNAs and SR proteins through the CC Arg-rich region. CC -!- PTM: Phosphorylated in vitro by SRPK1. CC -!- SIMILARITY: Belongs to the HHV-1 ICP27 protein family. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; X04370; CAA27887.1; -; Genomic_DNA. DR PIR; D27212; WZBE4. DR ProtClustDB; PHA3118; -. DR GO; GO:0030430; C:host cell cytoplasm; IEA:UniProtKB-SubCell. DR GO; GO:0042025; C:host cell nucleus; IEA:UniProtKB-SubCell. DR GO; GO:0003723; F:RNA binding; IEA:UniProtKB-KW. DR GO; GO:0006355; P:regulation of transcription, DNA-templated; IEA:UniProtKB-KW. DR GO; GO:0006351; P:transcription, DNA-templated; IEA:UniProtKB-KW. DR GO; GO:0016032; P:viral process; IEA:UniProtKB-KW. DR InterPro; IPR008648; Herpes_UL69. DR Pfam; PF05459; Herpes_UL69; 1. PE 1: Evidence at protein level; KW Activator; Complete proteome; Early protein; Host cytoplasm; KW Host nucleus; Host-virus interaction; Reference proteome; RNA-binding; KW Transcription; Transcription regulation. FT CHAIN 1 452 mRNA export factor ICP27 homolog. FT /FTId=PRO_0000115831. FT COMPBIAS 71 143 Arg-rich. FT COMPBIAS 405 452 Cys-rich. SQ SEQUENCE 452 AA; 51543 MW; 42926E4A71E380B4 CRC64; MASASIPTDP DVSTICEDFM NLLPDEPSDD FALEVTDWAN DEAIGSTPGE DSTTSRTVYV ERTADTAYNP RYSKRRHGRR ESYHHNRPKT LVVVLPDSNH HGGRDVETGY ARIERGHRRS SRSYNTQSSR KHRDRSLSNR RRRPTTPPAM TTGERNDQTH DESYRLRFSK RDARRERIRK EYDIPVDRIT GRAIEVVSTA GASVTIDSVR HLDETIEKLV VRYATIQEGD SWASGGCFPG IKQNTSWPEL MLYGHELYRT FESYKMDSRI ARALRERVIR GESLIEALES ADELLTWIKM LAAKNLPIYT NNPIVATSKS LLENLKLKLG PFVRCLLLNR DNDLGSRTLP ELLRQQRFSD ITCITTYMFV MIARIANIVV RGSKFVEYDD ISCNVQVLQE YTPGSCLAGV LEALITHQRE CGRVECTLST WAGHLSDARP YGKYFKCSTF NC //