Summary for Mst1 (NES ID: 68)

Full Name
Serine/threonine-protein kinase 4     UniProt    
Alternative Names
STE20-like kinase MST1
Mammalian STE20-like protein kinase 1
Serine/threonine-protein kinase Krs-2   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Phosphorylation and dimerization regulate nucleocytoplasmic shuttling of mammalian STE20-like kinase (MST), LeeYonehara et al., J Biol Chem, 2002
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
M368A/I370A/W439A/V441A, M368A/I370A/V441A/L444A Ref.1Phosphorylation and dimerization regulate nucleocytoplasmic shuttling of mammalian STE20-like kinase (MST), LeeYonehara et al., J Biol Chem, 2002
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
323DEMDSGTMVRAVGDEMGTVRVASTMTDGANTMIEHDDTLPSQLGTMVINAEDEEEEGTM381, 430DGDYEFLKSWTVEDLQKRLLALDPMMEQEIE460
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 
METVQLRNPP RRQLKKLDED SLTKQPEEVF DVLEKLGEGS YGSVYKAIHK ETGQIVAIKQ 

        70         80         90        100        110        120 
VPVESDLQEI IKEISIMQQC DSPHVVKYYG SYFKNTDLWI VMEYCGAGSV SDIIRLRNKT 

       130        140        150        160        170        180 
LTEDEIATIL QSTLKGLEYL HFMRKIHRDI KAGNILLNTE GHAKLADFGV AGQLTDTMAK 

       190        200        210        220        230        240 
RNTVIGTPFW MAPEVIQEIG YNCVADIWSL GITAIEMAEG KPPYADIHPM RAIFMIPTNP 

       250        260        270        280        290        300 
PPTFRKPELW SDNFTDFVKQ CLVKSPEQRA TATQLLQHPF VRSAKGVSIL RDLINEAMDV 

       310        320        330        340        350        360 
KLKRQESQQR EVDQDDEENS EEDEMDSGTM VRAVGDEMGT VRVASTMTDG ANTMIEHDDT 

       370        380        390        400        410        420 
LPSQLGTMVI NAEDEEEEGT MKRRDETMQP AKPSFLEYFE QKEKENQINS FGKSVPGPLK 

       430        440        450        460        470        480 
NSSDWKIPQD GDYEFLKSWT VEDLQKRLLA LDPMMEQEIE EIRQKYQSKR QPILDAIEAK 

                                                                  
KRRQQNF
3D Structures in PDB
Not Available
Comments
MST is a member of a subfamily of kinases that share high similarity in the catalytic domain with STE20. The non-catalytic C-terminal domain may function as a negative regulatory domain, the removal of which remarkably increases the kinase activity. MST is cleaved and activated by various apoptotic stimuli. Lee and Yonehara showed that MST is a cytoplasmic protein and rapidly relocalizes to the nucleus after LMB treatment. They fused the putative NES (aa 323-381) and observed that a cytoplamsic localization of the fusion protein, indicating that the region is a functional NES. However, the possibility of another functional NES was raised when simultaneous mutations of all four hydrophobic residues in the putative NES failed to alter the cytoplasmic location of the whole protein. A second NES was identified among aa 430-460. MST became nuclear when the hydrophobic residues within both NES regions were changed to alanines. They also identified a bipartitie NLS region (aa 469-483).
References
[1]. "Phosphorylation and dimerization regulate nucleocytoplasmic shuttling of mammalian STE20-like kinase (MST)"
Lee, K.K., Yonehara, S. (2002) J Biol Chem, 277:12351-12358 PubMed
User Input
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