Summary for 4E-T (NES ID: 233)

Full Name
Eukaryotic translation initiation factor 4E transporter (eIF4E transporter)     UniProt    
Alternative Names
Eukaryotic translation initiation factor 4E nuclear import factor 1   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1A novel shuttling protein, 4E-T, mediates the nuclear import of the mRNA 5' cap-binding protein, eIF4E., Dostie et al., EMBO J, 2000 Ref.2Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation, Baumhardt et al., Mol Biol Cell, 2020
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
V438A/L442A/L445A/V447A/I613A/M617A/L620A/L622A/L627A/L630A/L632A/L636A/V638A Ref.1A novel shuttling protein, 4E-T, mediates the nuclear import of the mRNA 5' cap-binding protein, eIF4E., Dostie et al., EMBO J, 2000
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
321SMIEDVLGEGSVSASRFSRWFSNPSRSGSRSSSLGSTPHEELERLAGLEQAILSPGQNSG
NYFAPIPLEDHAENKVDILEMLQKAKVDLKPLLSSLSANKEKLKESSHSGVVLSVEEVEA
GLKGLKVDQQVKNSTPFMAEHLEETLSAVTNNRQLKKDGDMTAFNKLVSTMKASGTLPSQ
PKVS504, 505RNLESHLMSPAEIPGQPVPKNILQELLGQPVQRPASSNLLSGLMGSLEPTTSLLGQRAPS
PPLSQVFQTRAASADYLRPRIPSPIGFTPGPQQLLGDPFQGMRKPMSPITAQMSQLELQQ
AALEGLALPHDLAVQAANFYQPGFGKPQVDRTRD658 Ref.1A novel shuttling protein, 4E-T, mediates the nuclear import of the mRNA 5' cap-binding protein, eIF4E., Dostie et al., EMBO J, 2000
Secondary Structure of Export Signal
alpha-helix and strand
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 
MDRRSMGETE SGDAFLDLKK PPASKCPHRY TKEELLDIKE LPHSKQRPSC LSEKYDSDGV 

        70         80         90        100        110        120 
WDPEKWHASL YPASGRSSPV ESLKKELDTD RPSLVRRIVD PRERVKEDDL DVVLSPQRRS 

       130        140        150        160        170        180 
FGGGCHVTAA VSSRRSGSPL EKDSDGLRLL GGRRIGSGRI ISARTFEKDH RLSDKDLRDL 

       190        200        210        220        230        240 
RDRDRERDFK DKRFRREFGD SKRVFGERRR NDSYTEEEPE WFSAGPTSQS ETIELTGFDD 

       250        260        270        280        290        300 
KILEEDHKGR KRTRRRTASV KEGIVECNGG VAEEDEVEVI LAQEPAADQE VPRDAVLPEQ 

       310        320        330        340        350        360 
SPGDFDFNEF FNLDKVPCLA SMIEDVLGEG SVSASRFSRW FSNPSRSGSR SSSLGSTPHE 

       370        380        390        400        410        420 
ELERLAGLEQ AILSPGQNSG NYFAPIPLED HAENKVDILE MLQKAKVDLK PLLSSLSANK 

       430        440        450        460        470        480 
EKLKESSHSG VVLSVEEVEA GLKGLKVDQQ VKNSTPFMAE HLEETLSAVT NNRQLKKDGD 

       490        500        510        520        530        540 
MTAFNKLVST MKASGTLPSQ PKVSRNLESH LMSPAEIPGQ PVPKNILQEL LGQPVQRPAS 

       550        560        570        580        590        600 
SNLLSGLMGS LEPTTSLLGQ RAPSPPLSQV FQTRAASADY LRPRIPSPIG FTPGPQQLLG 

       610        620        630        640        650        660 
DPFQGMRKPM SPITAQMSQL ELQQAALEGL ALPHDLAVQA ANFYQPGFGK PQVDRTRDGF 

       670        680        690        700        710        720 
RNRQQRVTKS PAPVHRGNSS SPAPAASITS MLSPSFTPTS VIRKMYESKE KSKEEPASGK 

       730        740        750        760        770        780 
AALGDSKEDT QKASEENLLS SSSVPSADRD SSPTTNSKLS ALQRSSCSTP LSQANRYTKE 

       790        800        810        820        830        840 
QDYRPKATGR KTPTLASPVP TTPFLRPVHQ VPLVPHVPMV RPAHQLHPGL VQRMLAQGVH 

       850        860        870        880        890        900 
PQHLPSLLQT GVLPPGMDLS HLQGISGPIL GQPFYPLPAA SHPLLNPRPG TPLHLAMVQQ 

       910        920        930        940        950        960 
QLQRSVLHPP GSGSHAAAVS VQTTPQNVPS RSGLPHMHSQ LEHRPSQRSS SPVGLAKWFG 

       970        980                                             
SDVLQQPLPS MPAKVISVDE LEYRQ
3D Structures in PDB
6X2R (X-Ray,2.3 Å resolution)
Comments
4E-T is a nucleocytoplasmic shuttling protein. It interacts with eukaryotic translation initiation factor 4E (eIF4E) both in vivo and in vitro through the eIF4E binding site (aa 27-42). Y30A mutation abolishes binding to eIF4E. 4E-T contains one bipartite NLS and two NESs. NES in 434-447 is sufficient to bind CRM1 by itself in vitro and its affinity is reduced 10 fold by CRM1 cancer mutation E571K. Baumhardt et al. also reported that 4E-T is mislocalized in tumor cells carrying CRM1(E571K). Ref.2Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation, Baumhardt et al., Mol Biol Cell, 2020
References
[1]. "A novel shuttling protein, 4E-T, mediates the nuclear import of the mRNA 5' cap-binding protein, eIF4E."
Dostie J, Ferraiuolo M, Pause A, Adam SA, Sonenberg N. (2000) EMBO J, 19:3142-56 PubMed
[2]. "Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation"
Baumhardt JM, Walker JS, Lee Y, Shakya B, Brautigam CA, Lapalombella R, Grishin N, Chook YM. (2020) Mol Biol Cell, 31(17):1879-91 PubMed
User Input
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