Summary for Cdk5-p27 (NES ID: 194)

Full Name
Cell division protein kinase 5     UniProt    
Alternative Names
Cyclin-dependent kinase 5, Serine/threonine-protein kinase PSSALRE, Tau protein kinase II catalytic subunit   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive,  Binds CRM1 Ref.1Cdk5 nuclear localization is p27-dependent in nerve cells: implications for cell cycle suppression and caspase-3 activation., Zhang et al., J Biol Chem, 2010
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L70A/D73A/L76A/L78A, L132A/L133A/N137A/L140A/L142A Ref.1Cdk5 nuclear localization is p27-dependent in nerve cells: implications for cell cycle suppression and caspase-3 activation., Zhang et al., J Biol Chem, 2010
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
65RLHDVLHSDKKLTLVFEF82, 128KPQNLLINRNGELKLADFG146 Ref.1Cdk5 nuclear localization is p27-dependent in nerve cells: implications for cell cycle suppression and caspase-3 activation., Zhang et al., J Biol Chem, 2010
Secondary Structure of Export Signal
β-sheet (residues 70-79)
β-strands and loop (residues 128-142)
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 
MQKYEKLEKI GEGTYGTVFK AKNRETHEIV ALKRVRLDDD DEGVPSSALR EICLLKELKH 

        70         80         90        100        110        120 
KNIVRLHDVL HSDKKLTLVF EFCDQDLKKY FDSCNGDLDP EIVKSFLFQL LKGLGFCHSR 

       130        140        150        160        170        180 
NVLHRDLKPQ NLLINRNGEL KLADFGLARA FGIPVRCYSA EVVTLWYRPP DVLFGAKLYS 

       190        200        210        220        230        240 
TSIDMWSAGC IFAELANAGR PLFPGNDVDD QLKRIFRLLG TPTEEQWPSM TKLPDYKPYP 

       250        260        270        280        290            
MYPATTSLVN VVPKLNATGR DLLQNLLKCN PVQRISAEEA LQHPYFSDFC PP
3D Structures in PDB
1H4L (X-Ray,2.65 Å resolution)
1UNG (X-Ray,2.30 Å resolution)
Comments
Cdk5 is critical to the neuronal cell cycle and its nuclear localization is dependent upon interaction with p27. Cdk5 does not contain NLS of its own, but has two NES that direct it to the cytoplasm. Cdk5 nuclear export is required in postmitotic neurons for cell cycle re-entry, but once in the cytoplasm, Cdk5 may protect against rapid neuronal death.
Doubts about NES: Neither proposed NES bound CRM1 in GST-pulldown assay (Chook Lab, unpublished results).
References
[1]. "Cdk5 nuclear localization is p27-dependent in nerve cells: implications for cell cycle suppression and caspase-3 activation."
Zhang J, Li H, Herrup K. (2010) J Biol Chem, 285:14052-61 PubMed
User Input
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