Summary for pUL31 (NES ID: 268)

Full Name
Nuclear egress protein 1     UniProt    
Alternative Names
NEC1   
Organism
Suid alphaherpesvirus 1    
Experimental Evidence for CRM1-mediated Export
Unknown
Mutations That Affect Nuclear Export
*highlighted yellow in the full sequence
246ISFDGELLLEYKRLYAAFEDFRPPRP271 by Deletion, L252A/L254A Ref.1Functional characterization of nuclear trafficking signals in pseudorabies virus pUL31, Pasvogel et al., J. Virol., 2015
Mutations That Affect CRM1 Binding
Unknown
Functional Export Signals
Undetermined
Secondary Structure of Export Signal
coil (246-249) and alpha-helix (250-254)
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 
MFERRRLLRR KSSAARRKTL TRAARDRYAP YFAYAAAQPS DEVTTVRGLS NPLIKTAPVT 

        70         80         90        100        110        120 
LPFDLGQAVA DNCLSLSGMG YYLGLGGCCP TCAAAEPRLG RSDRAALVLA YVQQLNSIYE 

       130        140        150        160        170        180 
YRVFLASVAA RDPSERALEE VLAHPELFFA YYVLRDGGLR DVRVLFFEDP DAQGALMMYV 

       190        200        210        220        230        240 
VFPEKSVHVH HRVLDRLLGA CAGHRIVAHV WQTMFVLVVR KKGDGRPADD VPAVSASDIY 

       250        260        270                                  
CKMRDISFDG ELLLEYKRLY AAFEDFRPPR P
3D Structures in PDB
4Z3U (X-Ray,2.71 Å resolution)
5E8C (X-Ray,2.9 Å resolution)
Comments
The herpesviral nuclear egress complex (NEC), made up of pUL31 and pUL34, plays critical roles in the nuclear egress of newly synthesized capsids. pUL34 is anchored at the nuclear envelope and recruits pUL31 to the inner nuclear membrane. pUL31 contains an N-terminal NLS necessary for nuclear entry. Paßvogel et al. identified residues 246-251 to be putative NES, but it does not contain traditional NES consensus. Despite high sequence homology, NES was not predicted in other alphaherpesvirus homologs. Mutations that affect nuclear export were tested in the background of NLS removed, which caused diffuse localization of the predominantly cytoplasmic NLS mutant. Putative NES is part of a folded domain and is located at the outer surface, however, hydrophobic residues are not exposed.
References
[1]. "Functional characterization of nuclear trafficking signals in pseudorabies virus pUL31"
Paßvogel L, Klupp BG, Granzow H, Fuchs W, Mettenleiter TC. (2015) J. Virol., 89(4):2002-2012 PubMed
User Input
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