Summary for MK5 (NES ID: 165)

Full Name
MAP kinase-activated protein kinase 5     UniProt    
Alternative Names
MAPK-activated protein kinase 5, MAPKAP kinase 5, MAPKAPK-5   
Organism
Mus musculus (Mouse)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Serine residue 115 of MAPK-activated protein kinase MK5 is crucial for its PKA-regulated nuclear export and biological function., Kostenko et al., Cell Mol Life Sci, 2010 Ref.2Both binding and activation of p38 mitogen-activated protein kinase (MAPK) play essential roles in regulation of the nucleocytoplasmic distribution of MAPK-activated protein kinase 5 by cellular stress, Seternes et al., Mol Cell Biol, 2002
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L337A, L345A/L349A/L352A Ref.1Serine residue 115 of MAPK-activated protein kinase MK5 is crucial for its PKA-regulated nuclear export and biological function., Kostenko et al., Cell Mol Life Sci, 2010 Ref.2Both binding and activation of p38 mitogen-activated protein kinase (MAPK) play essential roles in regulation of the nucleocytoplasmic distribution of MAPK-activated protein kinase 5 by cellular stress, Seternes et al., Mol Cell Biol, 2002
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
Secondary Structure of Export Signal
α-helix followed by loop (331-342)
loop followed by α-helix (342-352)
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 
MSEDSDMEKA IKETSILEEY SINWTQKLGA GISGPVRVCV KKSTQERFAL KILLDRPKAR 

        70         80         90        100        110        120 
NEVRLHMMCA THPNIVQIIE VFANSVQFPH ESSPRARLLI VMEMMEGGEL FHRISQHRHF 

       130        140        150        160        170        180 
TEKQASQVTK QIALALQHCH LLNIAHRDLK PENLLFKDNS LDAPVKLCDF GFAKVDQGDL 

       190        200        210        220        230        240 
MTPQFTPYYV APQVLEAQRR HQKEKSGIIP TSPTPYTYNK SCDLWSLGVI IYVMLCGYPP 

       250        260        270        280        290        300 
FYSKHHSRTI PKDMRKKIMT GSFEFPEEEW SQISEMAKDV VRKLLKVKPE ERLTIEGVLD 

       310        320        330        340        350        360 
HPWLNSTEAL DNVLPSAQLM MDKAVVAGIQ QAHAEQLANM RIQDLKVSLK PLHSVNNPIL 

       370        380        390        400        410        420 
RKRKLLGTKP KDGIYIHDHE NGTEDSNVAL EKLRDVIAQC ILPQAGKGEN EDEKLNEVMQ 

       430        440        450        460        470            
EAWKYNRECK LLRDALQSFS WNGRGFTDKV DRLKLAEVVK QVIEEQTLPH EPQ
3D Structures in PDB
2ONL (X-Ray,4.00 Å resolution)
2OZA (X-Ray,2.70 Å resolution)
Comments
Although activation of the cAMP/PKA pathway by the cAMP-elevating agent forskolin has been shown to trigger a transient nuclear export of MK5, the S115D mutant resided predominantly in the nucleus in forskolin-treated cells. PKA-mediated phosphorylation of MK5 at Ser-115 is implicated in nuclear export of MK5. Furthermore, the nuclear expression of a double EGFP-MK5 S115D/L337A mutant suggested that a functional NES is required for PKA-mediated nuclear exclusion of MK5. ERK3-,ERK4-, and p38-MAPK-mediated nuclear export of MK5 does not require Serine115. PKI-like and Rev-like NES were identified, but not experimentally proven to be sufficient. An earlier paper from the same group showed that stress-induced nuclear export of MK5 also relies on CRM1 pathway and the signal is likely located from 345-352.
Doubts about NES: MK5-(337-355) failed to bind CRM1 in GST-pulldown assay (Chook Lab, unpublished results).
References
[1]. "Serine residue 115 of MAPK-activated protein kinase MK5 is crucial for its PKA-regulated nuclear export and biological function."
Kostenko S, Shiryaev A, Gerits N, Dumitriu G, Klenow H, Johannessen M, Moens U. (2010) Cell Mol Life Sci, : PubMed
[2]. "Both binding and activation of p38 mitogen-activated protein kinase (MAPK) play essential roles in regulation of the nucleocytoplasmic distribution of MAPK-activated protein kinase 5 by cellular stress"
Seternes OM, Johansen B, Hegge B, Johannessen M, Keyse SM, Moens U. (2002) Mol Cell Biol, 22:6931-45 PubMed
User Input
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