Organism
Human cytomegalovirus (strain Merlin)
Function
Evasion of NK cell killing. Blocks surface expression of PVR which is a ligand for NK cell-activating receptors. Binds human PVR in the endoplasmic reticulum and prevents its maturation and transport to the cell surface. Targets also the natural killer cell activating ligand NECTIN2 for proteasome-mediated degradation. Additionally promotes intracellular retention of TNFRSF10A/TRAIL-R1 and TNFRSF10B/TRAIL-R2 and thus downregulates their cell surface expression.
Sequence
MCRRESLRTLPWLFWVLLSCPRLLEYSSSSFPFATADIAEKMWAENYETTSPAPVLVAEGEQVTIPCTVMTHSWPMVSIRARFCRSHDGSDELILDAVKGHRLMNGLQYRLPYATWNFSQLHLGQIFSLTFNVSTDTAGMYECVLRNYSHGLIMQRFVILTQLETLSRPDEPCCTPALGRYSLGDQIWSPTPWRLRNHDCGMYRGFQRNYFYIGRADAEDCWKPACPDEEPDRCWTVIQRYRLPGDCYRSQPHPPKFLPVTPAPPADIDTGMSPWATRGIAAFLGFWSIFTVCFLCYLCYLQCCGRWCPTPGRGRRGGEGYRRLPTYDSYPGVKKMKR