Summary for PP2A B56α (NES ID: 157)

Full Name
Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit alpha isoform     UniProt    
Alternative Names
PP2A B subunit isoform B'-alpha, PP2A B subunit isoform B56-alpha, PP2A B subunit isoform PR61-alpha, PP2A B subunit isoform R5-alpha   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Nuclear Export and Centrosome Targeting of the Protein Phosphatase 2A Subunit B56 , Cameron et al., J Biol Chem, 2010
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L458A, L461A, L463A Ref.1Nuclear Export and Centrosome Targeting of the Protein Phosphatase 2A Subunit B56 , Cameron et al., J Biol Chem, 2010
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
451REELWKKLEELKLKKALEK469 Ref.1Nuclear Export and Centrosome Targeting of the Protein Phosphatase 2A Subunit B56 , Cameron et al., J Biol Chem, 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 
MSSSSPPAGA ASAAISASEK VDGFTRKSVR KAQRQKRSQG SSQFRSQGSQ AELHPLPQLK 

        70         80         90        100        110        120 
DATSNEQQEL FCQKLQQCCI LFDFMDSVSD LKSKEIKRAT LNELVEYVST NRGVIVESAY 

       130        140        150        160        170        180 
SDIVKMISAN IFRTLPPSDN PDFDPEEDEP TLEASWPHIQ LVYEFFLRFL ESPDFQPSIA 

       190        200        210        220        230        240 
KRYIDQKFVQ QLLELFDSED PRERDFLKTV LHRIYGKFLG LRAFIRKQIN NIFLRFIYET 

       250        260        270        280        290        300 
EHFNGVAELL EILGSIINGF ALPLKAEHKQ FLMKVLIPMH TAKGLALFHA QLAYCVVQFL 

       310        320        330        340        350        360 
EKDTTLTEPV IRGLLKFWPK TCSQKEVMFL GEIEEILDVI EPTQFKKIEE PLFKQISKCV 

       370        380        390        400        410        420 
SSSHFQVAER ALYFWNNEYI LSLIEENIDK ILPIMFASLY KISKEHWNPT IVALVYNVLK 

       430        440        450        460        470        480 
TLMEMNGKLF DDLTSSYKAE RQREKKKELE REELWKKLEE LKLKKALEKQ NSAYNMHSIL 

                                                                  
SNTSAE
3D Structures in PDB
Not Available
Comments
Protein phosphatase 2A (PP2A) is a heterotrimeric serine-threonine phosphatase enzyme. The PP2A B-subunits regulate activity by targeting the holoenzyme to specific subcellular locations, determining substrate specificity, and by affecting the timing and tissue specificity of phosphatase activity. B56α contributes to the nuclear export of the PP2A catalytic subunit, and an L461 mutation blocked the export of B56α as well as the regulation of the C-subunit. NES were also identified in two other B56 subunits known to locate in the cytoplasm. Cells may use alternate splicing and translation to generation different NES or NLS in different tissues and cell types.
References
[1]. "Nuclear Export and Centrosome Targeting of the Protein Phosphatase 2A Subunit B56 "
Cameron P. Flegg, Manisha Sharma, Cahora Medina-Palazon, Cara Jamieson, Melanie Galea, Mariana G. Brocardo, Kate Mills, and Beric R. Henderson (2010) J Biol Chem, 285:18144-54 PubMed
User Input
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