Summary for AhR (NES ID: 55)

Full Name
Aryl hydrocarbon receptor     UniProt    
Alternative Names
Class E basic helix-loop-helix protein 76 (bHLHe76)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
Inhibit or inhibited by other CRM1 cargos Ref.1Nuclear localization and export signals of the human aryl hydrocarbon receptor, Ikuta et al., J Biol Chem, 1998
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
L70A/L72A Ref.1Nuclear localization and export signals of the human aryl hydrocarbon receptor, Ikuta et al., J Biol Chem, 1998
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
*shown as underlined residues in the full sequence
55PFPQDVINKLDKLSVLRLSVS75 Ref.1Nuclear localization and export signals of the human aryl hydrocarbon receptor, Ikuta et al., J Biol Chem, 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 
MNSSSANITY ASRKRRKPVQ KTVKPIPAEG IKSNPSKRHR DRLNTELDRL ASLLPFPQDV 

        70         80         90        100        110        120 
INKLDKLSVL RLSVSYLRAK SFFDVALKSS PTERNGGQDN CRAANFREGL NLQEGEFLLQ 

       130        140        150        160        170        180 
ALNGFVLVVT TDALVFYASS TIQDYLGFQQ SDVIHQSVYE LIHTEDRAEF QRQLHWALNP 

       190        200        210        220        230        240 
SQCTESGQGI EEATGLPQTV VCYNPDQIPP ENSPLMERCF ICRLRCLLDN SSGFLAMNFQ 

       250        260        270        280        290        300 
GKLKYLHGQK KKGKDGSILP PQLALFAIAT PLQPPSILEI RTKNFIFRTK HKLDFTPIGC 

       310        320        330        340        350        360 
DAKGRIVLGY TEAELCTRGS GYQFIHAADM LYCAESHIRM IKTGESGMIV FRLLTKNNRW 

       370        380        390        400        410        420 
TWVQSNARLL YKNGRPDYII VTQRPLTDEE GTEHLRKRNT KLPFMFTTGE AVLYEATNPF 

       430        440        450        460        470        480 
PAIMDPLPLR TKNGTSGKDS ATTSTLSKDS LNPSSLLAAM MQQDESIYLY PASSTSSTAP 

       490        500        510        520        530        540 
FENNFFNESM NECRNWQDNT APMGNDTILK HEQIDQPQDV NSFAGGHPGL FQDSKNSDLY 

       550        560        570        580        590        600 
SIMKNLGIDF EDIRHMQNEK FFRNDFSGEV DFRDIDLTDE ILTYVQDSLS KSPFIPSDYQ 

       610        620        630        640        650        660 
QQQSLALNSS CMVQEHLHLE QQQQHHQKQV VVEPQQQLCQ KMKHMQVNGM FENWNSNQFV 

       670        680        690        700        710        720 
PFNCPQQDPQ QYNVFTDLHG ISQEFPYKSE MDSMPYTQNF ISCNQPVLPQ HSKCTELDYP 

       730        740        750        760        770        780 
MGSFEPSPYP TTSSLEDFVT CLQLPENQKH GLNPQSAIIT PQTCYAGAVS MYQCQPEPQH 

       790        800        810        820        830        840 
THVGQMQYNP VLPGQQAFLN KFQNGVLNET YPAELNNINN TQTTTHLQPL HHPSEARPFP 

                                                                  
DLTSSGFL
3D Structures in PDB
Not Available
Comments
AhR binds a variety of environmentally important carcinogens. Before ligand binding, AhR is located in the cytoplasm as a part of a complex. After ligand bind, it enters into the nucleus and forms a heterodimer with AhR nuclear translocator (ANNT). The heterodimer regulates the transcription of several enzymes involved in the metabolism of polycyclic aromatic hydrocarbons. Ikuta et al. carried out the study to examine the translocation pathway of AhR. They identified a bipartite NLS in the N-terminal of AhR (aa 13-39). Mutational analysis showed that R13, K14, R15, K37, and R38 are essential for import activity. They also demonstrated that aa 55-75 are functional NES, since the sequence, when fused to GST-GFP, can target the fusion protein from nucleus to cytoplasm. Mutation of core leucines (L70/L72) to alanines disrupted the export. Furthermore, the presence of excessive PKI-NES inhibit the export of GST-GFP-AhR-NES, suggesting that they share a common export pathway.
References
[1]. "Nuclear localization and export signals of the human aryl hydrocarbon receptor"
Ikuta, T., Eguchi, H., Tachibana, T., Yoneda, Y., Kawajiri, K. (1998) J Biol Chem, 273:2895-2904 PubMed
User Input
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