Summary for E2F1 (NES ID: 59)

Full Name
Transcription factor E2F1     UniProt    
Alternative Names
PBR3
PRB-binding protein E2F-1
Retinoblastoma-associated protein 1 (RBAP-1)
Retinoblastoma-binding protein 3 (RBBP-3)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
75TPSAPRPALGRPPVKRRLDLETDHQY100 by Deletion, 100YLAESSGPARGRGRHPGKGVKSPGEKS126 by Deletion Ref.1A novel mechanism of E2F1 regulation via nucleocytoplasmic shuttling: determinants of nuclear import and export., Ivanova et al., Cell Cycle, 2007
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
Secondary Structure of Export Signal
Unknown; NES not included in PDBs
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
MALAGAPAGG PCAPALEALL GAGALRLLDS SQIVIISAAQ DASAPPAPTG PAAPAAGPCD
70 80 90 100 110 120
PDLLLFATPQ APRPTPSAPR PALGRPPVKR RLDLETDHQY LAESSGPARG RGRHPGKGVK
130 140 150 160 170 180
SPGEKSRYET SLNLTTKRFL ELLSHSADGV VDLNWAAEVL KVQKRRIYDI TNVLEGIQLI
190 200 210 220 230 240
AKKSKNHIQW LGSHTTVGVG GRLEGLTQDL RQLQESEQQL DHLMNICTTQ LRLLSEDTDS
250 260 270 280 290 300
QRLAYVTCQD LRSIADPAEQ MVMVIKAPPE TQLQAVDSSE NFQISLKSKQ GPIDVFLCPE
310 320 330 340 350 360
ETVGGISPGK TPSQEVTSEE ENRATDSATI VSPPPSSPPS SLTTDPSQSL LSLEQEPLLS
370 380 390 400 410 420
RMGSLRAPVD EDRLSPLVAA DSLLEHVRED FSGLLPEEFI SLSPPHEALD YHFGLEEGEG
430
IRDLFDCDFG DLTPLDF
3D Structures in PDB
2AZE (X-Ray,2.55 Å resolution)
Comments
E2F1 is a transcription factor whose localization depends on the induction of differentiation. The export of E2F1 is LMB sensitive. Amino Acids 82-94 resembles NES consensus. Deletion of residues 75-100 or 100-126 causes the loss of export activity. E1F1 shares 44% sequence identity with E2F4, which has two NESs. Both NESs in E2F4 are conserved in E2F1 (aa 167-179 and aa 196-206). However, E2F1 100-437 remains nuclear. On the other hand, the NES proposed in E2F1 is not present in E2F4. Although E2F1 shuttles, it shows no binding to Impβ.
References
[1]. "A novel mechanism of E2F1 regulation via nucleocytoplasmic shuttling: determinants of nuclear import and export."
Ivanova IA, Vespa A, Dagnino L. (2007) Cell Cycle, 6:2186-95 PubMed
[2]. "Activation of p38- and CRM1-dependent nuclear export promotes E2F1 degradation during keratinocyte differentiation."
Ivanova IA, Dagnino L (2007) Oncogene, 26:1147-54 PubMed
User Input
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