Summary for MAPKK1/MEK1 (NES ID: 11)
Full Name
Dual specificity mitogen-activated protein kinase kinase 1 (MAP kinase kinase 1) UniProt
Alternative Names
ERK activator kinase 1 MAPK/ERK kinase 1
Organism
Xenopus laevis (African clawed frog)
Experimental Evidence for CRM1-mediated Export
LMB Sensitive, Inhibit or inhibited by other CRM1 cargos Ref.2CRM1 is responsible for intracellular transport mediated by the nuclear export signal, Fukuda et al., Nature, 1997 Ref.1Cytoplasmic localization of mitogen-activated protein kinase kinase directed by its NH2-terminal, leucine-rich short amino acid sequence, which acts as a nuclear export signal, Fukuda et al., J Biol Chem, 1996 Ref.3Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation, Baumhardt et al., Mol Biol Cell, 2020 Ref.4Using a Simple Cellular Assay to Map NES Motifs in Cancer-Related Proteins, Gain Insight into CRM1-Mediated NES Export, and Search for NES-Harboring Micropeptides, Sendino et al., Int J Mol Sci, 2020
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L33A/L37A/L40A/L42A Ref.1Cytoplasmic localization of mitogen-activated protein kinase kinase directed by its NH2-terminal, leucine-rich short amino acid sequence, which acts as a nuclear export signal, Fukuda et al., J Biol Chem, 1996 Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
32ALQKKLEELELDE44 Ref.1Cytoplasmic localization of mitogen-activated protein kinase kinase directed by its NH2-terminal, leucine-rich short amino acid sequence, which acts as a nuclear export signal, Fukuda et al., J Biol Chem, 1996 Secondary Structure of Export Signal
alpha-helix and strand
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 60MPKKKPTPIQ LNPNPEGTAV NGTPTAETNL EALQKKLEEL ELDEQQRKRL EAFLTQKQKV70 80 90 100 110 120GELKDDDFEK VSELGAGNGG VVFKVSHKPT SLIMARKLIH LEIKPAIRNQ IIRELQVLHE130 140 150 160 170 180CNSPYIVGFY GAFYSDGEIS ICMEHMDGGS LDQVLKKAGK IPEKILGKVS IAVIKGLTYL190 200 210 220 230 240REKHKIMHRD VKPSNILVNS RGEIKLCDFG VSGQLIDSMA NSFVGTRSYM SPERLQGTHY250 260 270 280 290 300SVQSDIWSMG LSLVEMAIGR YPIPPPDAKE LELIFGCSVE RDPASSELAP RPRPPGRPIS310 320 330 340 350 360SYGPDSRPPM AIFELLDYIV NEPPPKLPSG VFGAEFQDFV NKCLVKNPAE RADLKQLMVH370 380 390SFIKQSELEE VDFAGWLCST MGLKQPSTPT HAAGV
3D Structures in PDB
Comments
MAPKK is a key intermediate in the mitogen-activated protein kinase (MAPK) cascade, and its cytoplasmic localization may be important for the proper signal transduction. Deletion of aa 32-51 resulted in diffusion of the protein through the cell. AA 32-44 is sufficient to export L-ov fusion protein after microinjection. AA 33-51 is also tested in Sendino et al. as Rev1.4-GFP and SRVA/B reporters and responded to CRM1 co-expression. The isolated MEK1 NES (residue 30-42) binds CRM1 with high affinity, but full-length human MEK1 binds CRM1 64-fold weaker, at 4.5uM (obtained by in vitro binding assays), likely due to the inaccessibility of the entire NES sequence in full-length structure. Ref.3Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation, Baumhardt et al., Mol Biol Cell, 2020 Ref.4Using a Simple Cellular Assay to Map NES Motifs in Cancer-Related Proteins, Gain Insight into CRM1-Mediated NES Export, and Search for NES-Harboring Micropeptides, Sendino et al., Int J Mol Sci, 2020
References
[1]. "Cytoplasmic localization of mitogen-activated protein kinase kinase directed by its NH2-terminal, leucine-rich short amino acid sequence, which acts as a nuclear export signal"
Fukuda, M., Gotoh, I, Gotoh, Y., Nishida, E. (1996) J Biol Chem, 271:20024-20028 PubMed
[2]. "CRM1 is responsible for intracellular transport mediated by the nuclear export signal"
Fukuda, M., Asano, S., Nakamura, T., Adachi, M., Yoshida, M., Yanagida, M., Nishida, E. (1997) Nature, 390:308-311 PubMed
[3]. "Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation"
Baumhardt JM, Walker JS, Lee Y, Shakya B, Brautigam CA, Lapalombella R, Grishin N, Chook YM. (2020) Mol Biol Cell, 31(17):1879-91 PubMed
[4]. "Using a Simple Cellular Assay to Map NES Motifs in Cancer-Related Proteins, Gain Insight into CRM1-Mediated NES Export, and Search for NES-Harboring Micropeptides"
Sendino M, Omaetxebarria MJ, Prieto G, Rodriguez JA. (2020) Int J Mol Sci, 21(17):E6341 PubMed
Fukuda, M., Gotoh, I, Gotoh, Y., Nishida, E. (1996) J Biol Chem, 271:20024-20028 PubMed
[2]. "CRM1 is responsible for intracellular transport mediated by the nuclear export signal"
Fukuda, M., Asano, S., Nakamura, T., Adachi, M., Yoshida, M., Yanagida, M., Nishida, E. (1997) Nature, 390:308-311 PubMed
[3]. "Recognition of Nuclear Export Signals by CRM1 Carrying the Oncogenic E571K Mutation"
Baumhardt JM, Walker JS, Lee Y, Shakya B, Brautigam CA, Lapalombella R, Grishin N, Chook YM. (2020) Mol Biol Cell, 31(17):1879-91 PubMed
[4]. "Using a Simple Cellular Assay to Map NES Motifs in Cancer-Related Proteins, Gain Insight into CRM1-Mediated NES Export, and Search for NES-Harboring Micropeptides"
Sendino M, Omaetxebarria MJ, Prieto G, Rodriguez JA. (2020) Int J Mol Sci, 21(17):E6341 PubMed
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