Summary for Olig1 (NES ID: 266)

Full Name
Oligodendrocyte transcription factor 1     UniProt    
Alternative Names
Class B basic helix-loop-helix protein 6 (bHLHb6), Class E basic helix-loop-helix protein 21 (bHLHe21)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive Ref.1Olig1 Acetylation and Nuclear Export Mediate Oligodendrocyte Development, Dai et al., J Neurosci, 2015
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
148LSKIATLLL156 by Deletion, 162LLLGSSLQEL171 by Deletion, 186LLLAGLPLL194 by Deletion, 148-156/162-171/186-194 by Deletion, K150R, K150Q (Enhance) Ref.1Olig1 Acetylation and Nuclear Export Mediate Oligodendrocyte Development, Dai et al., J Neurosci, 2015
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
148LSKIATLLL156, 186LLLAGLPLL194 Ref.1Olig1 Acetylation and Nuclear Export Mediate Oligodendrocyte Development, Dai et al., J Neurosci, 2015
Secondary Structure of Export Signal
Unknown
Other Residues Important for Export
*shown as green residues in the full sequence
K150 Ref.1Olig1 Acetylation and Nuclear Export Mediate Oligodendrocyte Development, Dai et al., J Neurosci, 2015
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 
MYYAVSQARV NAVPGTMLRP QRPGDLQLGA SLYELVGYRQ PPSSSSSSTS STSSTSSSST 

        70         80         90        100        110        120 
TAPLLPKAAR EKPEAPAEPP GPGPGSGAHP GGSARPDAKE EQQQQLRRKI NSRERKRMQD 

       130        140        150        160        170        180 
LNLAMDALRE VILPYSAAHC QGAPGRKLSK IATLLLARNY ILLLGSSLQE LRRALGEGAG 

       190        200        210        220        230        240 
PAAPRLLLAG LPLLAAAPGS VLLAPGAVGP PDALRPAKYL SLALDEPPCG QFALPGGGAG 

       250        260        270                                  
GPGLCTCAVC KFPHLVPASL GLAAVQAQFS K
3D Structures in PDB
Not Available
Comments
Olig1 and Olig2 (another closely related bHLH protein) are critical transcription factors for oligodendrocyte development and remyelination. Olig1's cellular localization is spatiotemporally regulated, where Olig2 is only found in the nucleus. Dai et al. identified 3 putative NESs in Olig1 within or close to the bHLH domain. Overall all NES sequences appears to have an excess of leucines despite matching NES consensus sequence patterns. NES1 is conserved in Olig1 and Olig2. Insertion of NES3 from Olig1 to Olig2 directed efficient nuclear export. Acetylation at K150 was found to be critical for efficient export of Olig1 in myelinating oligodendrocytes, which enables dissociation of Olig1 from chromatin and association with Id2 (a negative regulator of oligodendrocyte differentiation), which is also exported to the cytoplasm at similar time frames as Olig1 during differentiation.
References
[1]. "Olig1 Acetylation and Nuclear Export Mediate Oligodendrocyte Development"
Dai J, Bercury KK, Jin W, Macklin WB. (2015) J Neurosci, 35(48):15875-15893 PubMed
User Input
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