Summary for Jab1/CSN5 (NES ID: 35)

Full Name
COP9 signalosome complex subunit 5     UniProt    
Alternative Names
Jun activation domain-binding protein 1
Kip1 C-terminus-interacting protein 2
SGN5   
Organism
Mus musculus (Mouse)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1The cytoplasmic shuttling and subsequent degradation of p27Kip1 mediated by Jab1/CSN5 and the COP9 signalosome complex, Tomoda et al., J Biol Chem, 2002
Mutations That Affect Nuclear Export
Unknown
Mutations That Affect CRM1 Binding
*shown as red residues in the full sequence
L237A/L240A/L241A Ref.1The cytoplasmic shuttling and subsequent degradation of p27Kip1 mediated by Jab1/CSN5 and the COP9 signalosome complex, Tomoda et al., J Biol Chem, 2002
Functional Export Signals
*shown as underlined residues in the full sequence
233LDRKLLELLW242 Ref.1The cytoplasmic shuttling and subsequent degradation of p27Kip1 mediated by Jab1/CSN5 and the COP9 signalosome complex, Tomoda et al., J Biol Chem, 2002
Secondary Structure of Export Signal
Unknown
Other Residues Important for Export
*shown as green residues in the full sequence
243NKYWVNTLSSSSLLTNADYTTGQVFDLSEKLEQSEAQLGRGSFMLGLETHDRKSEDKLAK
ATRDSCKTTIEAIHGLMSQVIKDKLFNQINVA334 Ref.1The cytoplasmic shuttling and subsequent degradation of p27Kip1 mediated by Jab1/CSN5 and the COP9 signalosome complex, Tomoda et al., J Biol Chem, 2002
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 
MAASGSGMAQ KTWELANNMQ EAQSIDEIYK YDKKQQQEIL AAKPWTKDHH YFKYCKISAL 

        70         80         90        100        110        120 
ALLKMVMHAR SGGNLEVMGL MLGKVDGETM IIMDSFALPV EGTETRVNAQ AAAYEYMAAY 

       130        140        150        160        170        180 
IENAKQVGRL ENAIGWYHSH PGYGCWLSGI DVSTQMLNQQ FQEPFVAVVI DPTRTISAGK 

       190        200        210        220        230        240 
VNLGAFRTYP KGYKPPDEGP SEYQTIPLNK IEDFGVHCKQ YYALEVSYFK SSLDRKLLEL 

       250        260        270        280        290        300 
LWNKYWVNTL SSSSLLTNAD YTTGQVFDLS EKLEQSEAQL GRGSFMLGLE THDRKSEDKL 

       310        320        330                                  
AKATRDSCKT TIEAIHGLMS QVIKDKLFNQ INVA
3D Structures in PDB
Not Available
Comments
Jab1/CSN5 is the fifth component of the COP9 signalosome (CSN) complex. Jab1/CSN5 down-regulate p27Kip1 by directly interact with p27, which was exported to the cytoplasm and induced to be degraded. LMB treatment prevents p27 breakdown, indicating nuclear export plays an important role. Tomoda et al. found that it is Jab1/CSN5 that interacts with CRM1 in vitro binding assays in LMB sensitive manner, and aa 233-242 alone is sufficient for CRM1 binding. Mutations of L237/240/242 to alanines disrupt in vitro binding. However, aa 242-334 can still interact with CRM1. The effect of mutation within NES (233-242) in CRM1 binding is partial. PLEASE NOTE THAT THE FUNCTIONAL NES (233-242) IS ESTABLISHED BY CRM1 BINDING ASSAYS. They also carried out other experiments to show that the N-terminal half of Jab1/CSN5 can form intermediate complex with p27 in proliferating cells.
References
[1]. "The cytoplasmic shuttling and subsequent degradation of p27Kip1 mediated by Jab1/CSN5 and the COP9 signalosome complex"
Tomoda, K., Kubota, Y., Arata, Y., Mori, S., Maeda, M., Tanaka, T., Yoshida, M., Yoneda-Kato, N., Kato, J.Y. (2002) J Biol Chem, 277:2302-2310 PubMed
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