Summary for Src (NES ID: 396)

Full Name
Homeotic protein Sex combs reduced     UniProt    
Alternative Names
None
Organism
Drosophila melanogaster (Fruit fly)    
Experimental Evidence for CRM1-mediated Export
Binds CRM1,  Reporter activity when co-expressed with CRM1 Ref.1Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body, Duffraisse et al., J Cell Sci, 2020
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
Y305A/P306A/W307A/M308A Ref.1Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body, Duffraisse et al., J Cell Sci, 2020
Mutations That Affect CRM1 Binding
*shown as red residues in the full sequence
Y305A/P306A/W307A/M308A Ref.1Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body, Duffraisse et al., J Cell Sci, 2020
Functional Export Signals
*shown as underlined residues in the full sequence
304IYPWMKRVHL313 Ref.1Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body, Duffraisse et al., J Cell Sci, 2020
Secondary Structure of Export Signal
loop
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 
MDPDCFAMSS YQFVNSLASC YPQQMNPQQN HPGAGNSSAG GSGGGAGGSG GVVPSGGTNG 

        70         80         90        100        110        120 
GQGSAGAATP GANDYFPAAA AYTPNLYPNT PQAHYANQAA YGGQGNPDMV DYTQLQPQRL 

       130        140        150        160        170        180 
LLQQQQQQQQ QQHAHAAAAV AAQQQQQLAQ QQHPQQQQQQ QQANISCKYA NDPVTPGGSG 

       190        200        210        220        230        240 
GGGVSGSNNN NNSANSNNNN SQSLASPQDL STRDISPKLS PSSVVESVAR SLNKGVLGGS 

       250        260        270        280        290        300 
LAAAAAAAGL NNNHSGSGVS GGPGNVNVPM HSPGGGDSDS ESDSGNEAGS SQNSGNGKKN 

       310        320        330        340        350        360 
PPQIYPWMKR VHLGTSTVNA NGETKRQRTS YTRYQTLELE KEFHFNRYLT RRRRIEIAHA 

       370        380        390        400        410            
LCLTERQIKI WFQNRRMKWK KEHKMASMNI VPYHMGPYGH PYHQFDIHPS QFAHLSA
3D Structures in PDB
2R5Y (X-ray,2.60 Å resolution)
Comments
Scr is a homeodomain-containing transcription factor critical for developmental regulation. Duffraisse et al. found that Scr also contains a putative NES similar to Ubx (entry 395), but it follows conventional class 1a pattern including the W-containing HEX motif. HEX motif is known to be critical for binding to co-factors for DNA-binding. Interaction with drosophila CRM1 Embargoed is illustrated by biomolecular fluorescence complementation and in vitro pull-down, where HEX mutations affected the observed interaction (but only in the cytoplasm - signal increased in the nucleus). Co-expression with Emb also caused cytoplasmic accumulation of Scr which is dependent on intact HEX motif. The putative NES fused to nuclear protein Dronpa caused cytoplasmic accumulation of Dronpa, suggesting that the NES can function in peptide level. Ref.1Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body, Duffraisse et al., J Cell Sci, 2020
References
[1]. "Role of a versatile peptide motif controlling Hox nuclear export and autophagy in the Drosophila fat body"
Duffraisse M, Paul R, Carnesecchi J, Hudry B, Banreti A, Reboulet J, Ajuria L, Lohmann I, Merabet S. (2020) J Cell Sci, 133(18):jcs241943 PubMed
User Input
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