Summary for PP2Acα (NES ID: 213)

Full Name
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform     UniProt    
Alternative Names
Replication protein C (PR-C)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Involvement of protein phosphatase 2A nuclear accumulation and subsequent inactivation of activator protein-1 in leptomycin B-inhibited cyclin D1 expression., Tsuchiya et al., Oncogene, 2007
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L149A/L153A/L155A/L158A Ref.1Involvement of protein phosphatase 2A nuclear accumulation and subsequent inactivation of activator protein-1 in leptomycin B-inhibited cyclin D1 expression., Tsuchiya et al., Oncogene, 2007
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
Secondary Structure of Export Signal
helix followed by a short loop and then β-strand as part of an extend β-sheet
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 
MDEKVFTKEL DQWIEQLNEC KQLSESQVKS LCEKAKEILT KESNVQEVRC PVTVCGDVHG 

        70         80         90        100        110        120 
QFHDLMELFR IGGKSPDTNY LFMGDYVDRG YYSVETVTLL VALKVRYRER ITILRGNHES 

       130        140        150        160        170        180 
RQITQVYGFY DECLRKYGNA NVWKYFTDLF DYLPLTALVD GQIFCLHGGL SPSIDTLDHI 

       190        200        210        220        230        240 
RALDRLQEVP HEGPMCDLLW SDPDDRGGWG ISPRGAGYTF GQDISETFNH ANGLTLVSRA 

       250        260        270        280        290        300 
HQLVMEGYNW CHDRNVVTIF SAPNYCYRCG NQAAIMELDD TLKYSFLQFD PAPRRGEPHV 

                                                                  
TRRTPDYFL
3D Structures in PDB
2IAE (X-Ray,3.50 Å resolution)
3C5W (X-Ray,2.80 Å resolution)
3FGA (X-Ray,2.70 Å resolution)
Comments
Protein phosphatase 2A is a holoenzyme consisting of three subunits. Tsuchiya et al. showed that LMB induces nuclear accumulation of PP2A. The sustained dephosphorylation activity of PP2A is involved in the inhibition of cyclin D1 expression by LMB, which induces G1 arrest in NIH3T2 cells. Note that an NES was also identified in the regulatory subunit of PP2A (NES ID 157).
References
[1]. "Involvement of protein phosphatase 2A nuclear accumulation and subsequent inactivation of activator protein-1 in leptomycin B-inhibited cyclin D1 expression."
Tsuchiya A, Tashiro E, Yoshida M, Imoto M (2007) Oncogene, 26:1522-32 PubMed
User Input
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