Summary for Naf1 (NES ID: 289)

Full Name
Nef-associated factor 1     UniProt    
Alternative Names
TNFAIP3-interacting protein 1 (TNIP1); A20-binding inhibitor of NF-kappa-B activation 1 (ABIN-1); HIV-1 Nef-interacting protein; Nip40-1; Virion-associated nuclear shuttling protein (VAN)   
Organism
Homo sapiens (Human)    
Experimental Evidence for CRM1-mediated Export
LMB Sensitive,  Binds CRM1 Ref.1HIV-1 Nef-associated Factor 1 Enhances Viral Production by Interacting with CRM1 to Promote Nuclear Export of Unspliced HIV-1 gag mRNA, Ren et al., J Biol Chem, 2016 Ref.2A Human Nuclear Shuttling Protein That Interacts With Human Immunodeficiency Virus Type 1 Matrix Is Packaged Into Virions, Gupta et al., J Virol, 2000
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
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 
MEGRGPYRIY DPGGSVPSGE ASAAFERLVK ENSRLKEKMQ GIKMLGELLE ESQMEATRLR 

        70         80         90        100        110        120 
QKAEELVKDN ELLPPPSPSL GSFDPLAELT GKDSNVTASP TAPACPSDKP APVQKPPSSG 

       130        140        150        160        170        180 
TSSEFEVVTP EEQNSPESSS HANAMALGPL PREDGNLMLH LQRLETTLSV CAEEPDHGQL 

       190        200        210        220        230        240 
FTHLGRMALE FNRLASKVHK NEQRTSILQT LCEQLRKENE ALKAKLDKGL EQRDQAAERL 

       250        260        270        280        290        300 
REENLELKKL LMSNGNKEGA SGRPGSPKME GTGKKAVAGQ QQASVTAGKV PEVVALGAAE 

       310        320        330        340        350        360 
KKVKMLEQQR SELLEVNKQW DQHFRSMKQQ YEQKITELRQ KLADLQKQVT DLEAEREQKQ 

       370        380        390        400        410        420 
RDFDRKLLLA KSKIEMEETD KEQLTAEAKE LRQKVKYLQD QLSPLTRQRE YQEKEIQRLN 

       430        440        450        460        470        480 
KALEEALSIQ TPPSSPPTAF GSPEGAGALL RKQELVTQNE LLKQQVKIFE EDFQRERSDR 

       490        500        510        520        530        540 
ERMNEEKEEL KKQVEKLQAQ VTLSNAQLKA FKDEEKAREA LRQQKRKAKA SGERYHVEPH 

       550        560        570        580        590        600 
PEHLCGAYPY AYPPMPAMVP HHGFEDWSQI RYPPPPMAME HPPPLPNSRL FHLPEYTWRL 

       610        620        630                                  
PCGGVRNPNQ SSQVMDPPTA RPTEPESPKN DREGPQ
3D Structures in PDB
Not Available
Comments
Naf1 is a cellular protein that is involved in the inflammatory response. It is one of the proteins that is hijacked by viruses during infection. Gupta et al. found that Naf1 is predominantly cytoplasmic (and LMB-sensitive) when expressed while a truncated C-terminal fragment is predominantly nuclear. However expression of untagged protein forms cytoplasmic aggregates even in presence of LMB. Four putative NESs matching traditional NES consensus are mapped to residues 35-44, 161-170, 419-429 and 494-503. Gupta et al. showed that mutations to these have no effect on localization. Ren et al. also found that Naf1 is required for HIV-1 production through a LMB-sensitive export of unspliced HIV-1 gag mRNA, mutation to NES1-3 (35/39, 161/164, 419/423 ) attenuated Naf1-mediated downstream effects but no localization was examined. It is unclear whether these sequences are true NESs or the export of Naf1 is mediated through another adaptor protein. CRM1 interaction was shown by co-IP in whole cell lysates and not purified protein.
References
[1]. "HIV-1 Nef-associated Factor 1 Enhances Viral Production by Interacting with CRM1 to Promote Nuclear Export of Unspliced HIV-1 gag mRNA"
Ren XX, Wang HB, Li C, Jiang JF, Xiong SD, Jin X, Wu L, Wang JH. (2016) J Biol Chem, 291(9):4580-4588 PubMed
[2]. "A Human Nuclear Shuttling Protein That Interacts With Human Immunodeficiency Virus Type 1 Matrix Is Packaged Into Virions"
Gupta K, Ott D, Hope TJ, Siliciano RF, Boeke JD. (2000) J Virol, 74(24):11811-24 PubMed
User Input
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