Summary for Cyclin B1 (NES ID: 12)

Full Name
G2/MITOTIC-SPECIFIC CYCLIN B1     UniProt    
Alternative Names
None
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive,  Binds CRM1 Ref.1Nuclear export of cyclin B1 and its possible role in the DNA damage-induced G2 checkpoint, Toyoshima et al., EMBO J, 1998 Ref.3Control of cyclin B1 localization through regulated binding of the nuclear export factor CRM1, Yang et al., Genes Dev, 1998 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
V149A/L151A/V153A Ref.1Nuclear export of cyclin B1 and its possible role in the DNA damage-induced G2 checkpoint, Toyoshima et al., EMBO J, 1998 Ref.2MPF localization is controlled by nuclear export, Hagting et al., EMBO J, 1998
Mutations That Affect CRM1 Binding
*shown as red residues in the full sequence
F146A Ref.3Control of cyclin B1 localization through regulated binding of the nuclear export factor CRM1, Yang et al., Genes Dev, 1998
Functional Export Signals
*shown as underlined residues in the full sequence
141DLCQAFSDVILA152 Ref.1Nuclear export of cyclin B1 and its possible role in the DNA damage-induced G2 checkpoint, Toyoshima et al., EMBO J, 1998
Secondary Structure of Export Signal
Unknown
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 
MALRVTRNSK INAENKAKIN MAGAKRVPTA PAATSKPGLR PRTALGDIGN KVSEQLQAKM 

        70         80         90        100        110        120 
PMKKEAKPSA TGKVIDKKLP KPLEKVPMLV PVPVSEPVPE PEPEPEPEPV KEEKLSPEPI 

       130        140        150        160        170        180 
LVDTASPSPM ETSGCAPAEE DLCQAFSDVI LAVNDVDAED GADPNLCSEY VKDIYAYLRQ 

       190        200        210        220        230        240 
LEEEQAVRPK YLLGREVTGN MRAILIDWLV QVQMKFRLLQ ETMYMTVSII DRFMQNNCVP 

       250        260        270        280        290        300 
KKMLQLVGVT AMFIASKYEE MYPPEIGDFA FVTDNTYTKH QIRQMEMKIL RALNFGLGRP 

       310        320        330        340        350        360 
LPLHFLRRAS KIGEVDVEQH TLAKYLMELT MLDYDMVHFP PSQIAAGAFC LALKILDNGE 

       370        380        390        400        410        420 
WTPTLQHYLS YTEESLLPVM QHLAKNVVMV NQGLTKHMTV KNKYATSKHA KISTLPQLNS 

       430                                                        
ALVQDLAKAV AKV
3D Structures in PDB
6GU2 ( X-ray ,2.00 Å resolution)
Comments
Cyclin B1/Cdc2 complex is a key regulator of cell cycle transition. Cyclin B1 accumulates in the cytoplasm during S and G2 phase and moves to the nucleus before nuclear envelope breakdown. It was previously found that there is a domain of Cyclin B1 (called CRS) in human that was sufficient for its cytoplasmic localization. Toyoshima et al. demonstrated that aa 141-152 can export NES-OVA conjugate. The CRS domain and NES function are conserved in Xenoopus (UniProt: P13350) as shown by Yang et al. In addition, they indicated that CRS contains four serine phosphorylation sites, which are important for Cyclin B1 nuclear accumulation. Mutation of Ser to Glu, which mimics constitutive phosphorylation, reduces the affinity of Cyclin B1 for CRM1. Residue 138-156 was also tested by Sendino et al. in Rev1.4-GFP and SRVA/B reporters which responded to CRM1 co-expression. Ref.3Control of cyclin B1 localization through regulated binding of the nuclear export factor CRM1, Yang et al., Genes Dev, 1998 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]. "Nuclear export of cyclin B1 and its possible role in the DNA damage-induced G2 checkpoint"
Toyoshima, F., Moriguchi, T., Wada, A., Fukuda, M., Nishida, E. (1998) EMBO J, 17:2728-2735 PubMed
[2]. "MPF localization is controlled by nuclear export"
Hagting A, Karlsson C, Clute P, Jackman M, Pines J. (1998) EMBO J, 14:4127-38 PubMed
[3]. "Control of cyclin B1 localization through regulated binding of the nuclear export factor CRM1"
Yang, J., Bardes, E.S., Moore, J.D., Brennan, J., Powers, M.A., Kornbluth, S. (1998) Genes Dev, 12:2131-2143 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
User Input
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