Summary for Smad1 (NES ID: 40)

Full Name
Mothers against decapentaplegic homolog 1 (Mothers against DPP homolog 1)     UniProt    
Alternative Names
Transforming growth factor-beta-signaling protein 1 (BSP-1)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Nucleocytoplasmic shuttling of Smad1 conferred by its nuclear localization and nuclear export signals, Xiao et al., J Biol Chem, 2001
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L406A/M409A Ref.1Nucleocytoplasmic shuttling of Smad1 conferred by its nuclear localization and nuclear export signals, Xiao et al., J Biol Chem, 2001
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
406LTKMCTIRM414 Ref.1Nucleocytoplasmic shuttling of Smad1 conferred by its nuclear localization and nuclear export signals, Xiao et al., J Biol Chem, 2001
Secondary Structure of Export Signal
α-helix
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 
MNVTSLFSFT SPAVKRLLGW KQGDEEEKWA EKAVDALVKK LKKKKGAMEE LEKALSCPGQ 

        70         80         90        100        110        120 
PSNCVTIPRS LDGRLQVSHR KGLPHVIYCR VWRWPDLQSH HELKPLECCE FPFGSKQKEV 

       130        140        150        160        170        180 
CINPYHYKRV ESPVLPPVLV PRHSEYNPQH SLLAQFRNLG QNEPHMPLNA TFPDSFQQPN 

       190        200        210        220        230        240 
SHPFPHSPNS SYPNSPGSSS STYPHSPTSS DPGSPFQMPA DTPPPAYLPP EDPMTQDGSQ 

       250        260        270        280        290        300 
PMDTNMMAPP LPSEINRGDV QAVAYEEPKH WCSIVYYELN NRVGEAFHAS STSVLVDGFT 

       310        320        330        340        350        360 
DPSNNKNRFC LGLLSNVNRN STIENTRRHI GKGVHLYYVG GEVYAECLSD SSIFVQSRNC 

       370        380        390        400        410        420 
NYHHGFHPTT VCKIPSGCSL KIFNNQEFAQ LLAQSVNHGF ETVYELTKMC TIRMSFVKGW 

       430        440        450        460                       
GAEYHRQDVT STPCWIEIHL HGPLQWLDKV LTQMGSPHNP ISSVS
3D Structures in PDB
1KHU (X-Ray,2.50 Å resolution)
Comments
Smad mediates signaling by bone morphogenetic (BMP). In resting state, Smad1 is distributed throughout the cytoplasm and the nucleus. After treatment with BMP, Smad1 completely accumulated in the nucleus. Xiao et al. showed that mutation of K39N/K40Q or deletion of aa 42-45 failed to display nuclear accumulation, thus establishing that this motif is an NLS. LMB treatment also induces nuclear accumulation in resting stage, indicating the presence of NES. They found that aa 406-414, fused to GST, caused a nuclear exclusion of GST from the nucleus after microinjection. L406A/M409A mutation eliminate its ability to exclude GST from nucleus. They also showed that both NLS and NES are required for optimal gene transcription activation.
References
[1]. "Nucleocytoplasmic shuttling of Smad1 conferred by its nuclear localization and nuclear export signals"
Xiao, Z., Watson, N., Rodriguez, C., Lodish, H.F.. (2001) J Biol Chem, 276:39404-39410 PubMed
User Input
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