Summary for Smad4 (NES ID: 18)

Full Name
Mothers against decapentaplegic homolog 4     UniProt    
Alternative Names
hSMAD4 Deletion target in pancreatic carcinoma 4   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Regulation of intracellular dynamics of Smad4 by its leucine-rich nuclear export signal, Watanabe et al., EMBO Rep, 2000
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L146A/L148A Ref.1Regulation of intracellular dynamics of Smad4 by its leucine-rich nuclear export signal, Watanabe et al., EMBO Rep, 2000
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
140GIDLSGLTLQ149 Ref.1Regulation of intracellular dynamics of Smad4 by its leucine-rich nuclear export signal, Watanabe et al., EMBO Rep, 2000
Secondary Structure of Export Signal
loop and a single helical-turn
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 
MDNMSITNTP TSNDACLSIV HSLMCHRQGG ESETFAKRAI ESLVKKLKEK KDELDSLITA 

        70         80         90        100        110        120 
ITTNGAHPSK CVTIQRTLDG RLQVAGRKGF PHVIYARLWR WPDLHKNELK HVKYCQYAFD 

       130        140        150        160        170        180 
LKCDSVCVNP YHYERVVSPG IDLSGLTLQS NAPSSMMVKD EYVHDFEGQP SLSTEGHSIQ 

       190        200        210        220        230        240 
TIQHPPSNRA STETYSTPAL LAPSESNATS TANFPNIPVA STSQPASILG GSHSEGLLQI 

       250        260        270        280        290        300 
ASGPQPGQQQ NGFTGQPATY HHNSTTTWTG SRTAPYTPNL PHHQNGHLQH HPPMPPHPGH 

       310        320        330        340        350        360 
YWPVHNELAF QPPISNHPAP EYWCSIAYFE MDVQVGETFK VPSSCPIVTV DGYVDPSGGD 

       370        380        390        400        410        420 
RFCLGQLSNV HRTEAIERAR LHIGKGVQLE CKGEGDVWVR CLSDHAVFVQ SYYLDREAGR 

       430        440        450        460        470        480 
APGDAVHKIY PSAYIKVFDL RQCHRQMQQQ AATAQAAAAA QAAAVAGNIP GPGSVGGIAP 

       490        500        510        520        530        540 
AISLSAAAGI GVDDLRRLCI LRMSFVKGWG PDYPRQSIKE TPCWIEIHLH RALQLLDEVL 

       550                                                        
HTMPIADPQP LD
3D Structures in PDB
5UWU (X-ray,2.24 Å resolution)
3L6X (X-Ray,2.40 Å resolution)
Comments
Smad4 is a common mediator of the Smads family. It forms complexes with receptor-specific Smads upon ligand stimulation, and translocates into the nucleus, where the complex regulates transcription of target gene. Without stimulation, Smad4 shuttles between the nucleus and the cytoplasm. The nuclear export activity is due to an NES signal (aa 140-149). Upon complex formation, the NES signal is blocked and Smad4 becomes nucleus.
References
[1]. "Regulation of intracellular dynamics of Smad4 by its leucine-rich nuclear export signal"
Watanabe, M., Masuyama, N., Fukuda, M., Nishida, E. (2000) EMBO Rep, 1:176-182 PubMed
User Input
Accurate identification of NESs is difficult because many sequences in the genome match the NES consensus. Therefore, some published NESs may be mistakenly identified. Please help us improve the accuracy of NESdb by providing either a positive or negative flag for the NES in this entry. Supporting comments are required to process the flag.

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