Summary for TFIIA (NES ID: 323)

Full Name
Transcription initiation factor IIA subunit 1     UniProt    
Alternative Names
TFIIAL, General transcription factor IIA subunit 1, TFIIA-42   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive,  Binds CRM1 Ref.1TFIIA transcriptional activity is controlled by a ‘cleave-and-run’ Exportin-1/Taspase 1-switch , Schrenk et al., J Mol Cell Biol, 2018
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
I28A/L30A, 1MANSANTNTVPKLYRSVIEDVINDVRDIFLDDGVDEQVL39 by Deletion Ref.1TFIIA transcriptional activity is controlled by a ‘cleave-and-run’ Exportin-1/Taspase 1-switch , Schrenk et al., J Mol Cell Biol, 2018
Mutations That Affect CRM1 Binding
*shown as red residues in the full sequence
I28A/L30A Ref.1TFIIA transcriptional activity is controlled by a ‘cleave-and-run’ Exportin-1/Taspase 1-switch , Schrenk et al., J Mol Cell Biol, 2018
Functional Export Signals
*shown as underlined residues in the full sequence
1MANSANTNTVPKLYRSVIEDVINDVRDIFLDDGVDEQVLM40 Ref.1TFIIA transcriptional activity is controlled by a ‘cleave-and-run’ Exportin-1/Taspase 1-switch , Schrenk et al., J Mol Cell Biol, 2018
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 
MANSANTNTV PKLYRSVIED VINDVRDIFL DDGVDEQVLM ELKTLWENKL MQSRAVDGFH 

        70         80         90        100        110        120 
SEEQQLLLQV QQQHQPQQQQ HHHHHHHQQA QPQQTVPQQA QTQQVLIPAS QQATAPQVIV 

       130        140        150        160        170        180 
PDSKLIQHMN ASNMSAAATA ATLALPAGVT PVQQILTNSG QLLQVVRAAN GAQYIFQPQQ 

       190        200        210        220        230        240 
SVVLQQQVIP QMQPGGVQAP VIQQVLAPLP GGISPQTGVI IQPQQILFTG NKTQVIPTTV 

       250        260        270        280        290        300 
AAPTPAQAQI TATGQQQPQA QPAQTQAPLV LQVDGTGDTS SEEDEDEEED YDDDEEEDKE 

       310        320        330        340        350        360 
KDGAEDGQVE EEPLNSEDDV SDEEGQELFD TENVVVCQYD KIHRSKNKWK FHLKDGIMNL 

       370                                                        
NGRDYIFSKA IGDAEW
3D Structures in PDB
1NVP (X-Ray,2.1 Å resolution)
5IYB (CryoEm,3.9 Å resolution)
3D24 (X-Ray,2.11 Å resolution)
Comments
TFIIA is a critical initiation factor for gene transcription by RNA polymerase II. Schrenk et al. uncovered an NES in the alpha subunit of TFIIA, showing both in vivo and in vitro evidence using GFP- and GST-fusion proteins. NES identified is conserved in mammalian TFIIA proteins. Structures of the protein show NES in an alpha-helical conformation, which is followed by a loop that connects to a second helix - while the NES is solvent exposed, the protein may have to partially unfold for better accessibility.
References
[1]. "TFIIA transcriptional activity is controlled by a ‘cleave-and-run’ Exportin-1/Taspase 1-switch "
Schrenk C, Fetz V, Vallet C, Heiselmayer C, Schröder E, Hensel A, Hahlbrock A, Wünsch D, Goesswein D, Bier C, Habtemichael N, Schneider G, Stauber RH, Knauer SK. (2018) J Mol Cell Biol, 10 (1):33-47 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: