Summary for Hxk2 (NES ID: 120)

Full Name
Hexokinase-2     UniProt    
Alternative Names
Hexokinase-B Hexokinase PII   
Organism
Saccharomyces cerevisiae (Baker's yeast)    
Experimental Evidence for CRM1-mediated Export
Binds CRM1,  Mislocalization in Xpo1-1 temperature sensitive strains Ref.1Nuclear Export of the Yeast Hexokinase 2 Protein Requires the Xpo1 (Crm1)-dependent Pathway., Pelaez et al., J Biol Chem, 2009
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L23A/I27A/F30A/I33A, L310A/I313A/L316A/L318A Ref.1Nuclear Export of the Yeast Hexokinase 2 Protein Requires the Xpo1 (Crm1)-dependent Pathway., Pelaez et al., J Biol Chem, 2009
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
Secondary Structure of Export Signal
α-helix
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 
MVHLGPKKPQ ARKGSMADVP KELMQQIENF EKIFTVPTET LQAVTKHFIS ELEKGLSKKG 

        70         80         90        100        110        120 
GNIPMIPGWV MDFPTGKESG DFLAIDLGGT NLRVVLVKLG GDRTFDTTQS KYRLPDAMRT 

       130        140        150        160        170        180 
TQNPDELWEF IADSLKAFID EQFPQGISEP IPLGFTFSFP ASQNKINEGI LQRWTKGFDI 

       190        200        210        220        230        240 
PNIENHDVVP MLQKQITKRN IPIEVVALIN DTTGTLVASY YTDPETKMGV IFGTGVNGAY 

       250        260        270        280        290        300 
YDVCSDIEKL QGKLSDDIPP SAPMAINCEY GSFDNEHVVL PRTKYDITID EESPRPGQQT 

       310        320        330        340        350        360 
FEKMSSGYYL GEILRLALMD MYKQGFIFKN QDLSKFDKPF VMDTSYPARI EEDPFENLED 

       370        380        390        400        410        420 
TDDLFQNEFG INTTVQERKL IRRLSELIGA RAARLSVCGI AAICQKRGYK TGHIAADGSV 

       430        440        450        460        470        480 
YNRYPGFKEK AANALKDIYG WTQTSLDDYP IKIVPAEDGS GAGAAVIAAL AQKRIAEGKS 

                                                                  
VGIIGA
3D Structures in PDB
1IG8 (X-Ray,2.20 Å resolution)
2YHX (X-Ray,2.10 Å resolution)
5UWT (X-ray,2.34 Å resolution)
Comments
Hxk2 is a multifunctional protein that shuttles in and out of the nucleus. In the cytoplasm, Hxk2 catalyzes glucose in high glucose condition, while in the nucleus, it is involved in the regulation of glucose repression genes. There are two NESs in Hxk2. Both are required for efficient export, although NES at 311-319 seems to play a major role. Phosphorylation of Hxk2 facilitates binding to CRM1.
Doubts about NES: The N-terminal NES failed to bind CRM1 in GST-pulldown assay (Chook Lab, unpublished results).
References
[1]. "Nuclear Export of the Yeast Hexokinase 2 Protein Requires the Xpo1 (Crm1)-dependent Pathway."
Peláez R, Herrero P, Moreno F (2009) J Biol Chem, 284:20548-55 PubMed
User Input
Accurate identification of NESs is difficult because many sequences in the genome match the NES consensus. Therefore, some published NESs may be mistakenly identified. Please help us improve the accuracy of NESdb by providing either a positive or negative flag for the NES in this entry. Supporting comments are required to process the flag.

Supporting comments *

Flag this NES *

Positive
Negative

E-mail: