Summary for HPV11 E1 (NES ID: 140)

Full Name
Replication protein E1     UniProt    
Alternative Names
ATP-dependent helicase E1   
Organism
Human papillomavirus type 11    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Cyclin/CDK regulates the nucleocytoplasmic localization of the human papillomavirus E1 DNA helicase, Deng et al., J. Virol., 2004 Ref.2Nuclear export of HPV31 E1 is regulated by Cdk2 phosphorylation and required for viral genome maintenance., Fradet-Turcotte et al., J Virol, 2010
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L110A/I113A Ref.1Cyclin/CDK regulates the nucleocytoplasmic localization of the human papillomavirus E1 DNA helicase, Deng et al., J. Virol., 2004 Ref.2Nuclear export of HPV31 E1 is regulated by Cdk2 phosphorylation and required for viral genome maintenance., Fradet-Turcotte et al., J Virol, 2010
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
106ISPRLDAIKL115 Ref.1Cyclin/CDK regulates the nucleocytoplasmic localization of the human papillomavirus E1 DNA helicase, Deng et al., J. Virol., 2004 Ref.2Nuclear export of HPV31 E1 is regulated by Cdk2 phosphorylation and required for viral genome maintenance., Fradet-Turcotte et al., J Virol, 2010
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 
MADDSGTENE GSGCTGWFMV EAIVEHTTGT QISEDEEEEV EDSGYDMVDF IDDRHITQNS 

        70         80         90        100        110        120 
VEAQALFNRQ EADAHYATVQ DLKRKYLGSP YVSPISNVAN AVESEISPRL DAIKLTTQPK 

       130        140        150        160        170        180 
KVKRRLFETR ELTDSGYGYS EVEAATQVEK HGDPENGGDG QERDTGRDIE GEGVEHREAE 

       190        200        210        220        230        240 
AVDDSTREHA DTSGILELLK CKDIRSTLHG KFKDCFGLSF VDLIRPFKSD RTTCADWVVA 

       250        260        270        280        290        300 
GFGIHHSIAD AFQKLIEPLS LYAHIQWLTN AWGMVLLVLI RFKVNKSRCT VARTLGTLLN 

       310        320        330        340        350        360 
IPENHMLIEP PKIQSGVRAL YWFRTGISNA STVIGEAPEW ITRQTVIEHS LADSQFKLTE 

       370        380        390        400        410        420 
MVQWAYDNDI CEESEIAFEY AQRGDFDSNA RAFLNSNMQA KYVKDCAIMC RHYKHAEMKK 

       430        440        450        460        470        480 
MSIKQWIKYR GTKVDSVGNW KPIVQFLRHQ NIEFIPFLSK LKLWLHGTPK KNCIAIVGPP 

       490        500        510        520        530        540 
DTGKSCFCMS LIKFLGGTVI SYVNSCSHFW LQPLTDAKVA LLDDATQPCW TYMDTYMRNL 

       550        560        570        580        590        600 
LDGNPMSIDR KHRALTLIKC PPLLVTSNID ISKEEKYKYL HSRVTTFTFP NPFPFDRNGN 

       610        620        630        640                       
AVYELSDANW KCFFERLSSS LDIEDSEDEE DGSNSQAFRC VPGSVVRTL
3D Structures in PDB
Not Available
Comments
HPV E1 protein is a helicase necessary for the viral DNA replication. In addition, it interacts with other replication factors to proliferate the viral episome. Nuclear export of E1 is not necessary for viral DNA replication, but important for long-term maintenance of the HPV genome over multiple divisions of infected cells. E1 protein is phosphorylated by multiple CDK in vitro and mutation of phosphorylation targets severely comprise its activity. Deng et al. showed that E1 has a potent NES, which is inactivated by CDK phosphorylation of two serines upstream of NES. Fradet-Turcotte et al. showed that E1 protein of HPV31 has a very similar NES (UniProt: P17382). Increased nuclear accumulation of E1 results in reduced cell proliferation due to a delayed cell-cycle progression in S-phase.
References
[1]. "Cyclin/CDK regulates the nucleocytoplasmic localization of the human papillomavirus E1 DNA helicase"
Deng W, Lin BY, Jin G, Wheeler CG, Ma T, Harper JW, Broker TR, Chow LT. (2004) J. Virol., 78:13954-13965 PubMed
[2]. "Nuclear export of HPV31 E1 is regulated by Cdk2 phosphorylation and required for viral genome maintenance."
Fradet-Turcotte A, Moody C, Laimins LA, Archambault J. (2010) J Virol, 84:11747-60 PubMed
User Input
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