Matrix protein VP40 - Q05128 (VP40_EBOZM)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q05128: 8
Plays an essential role in the regulation of intracellular transport required to bring virion components to sites of assembly at the inner surface of the plasma membrane. Facilitates the transport of nucleocapsids from cytoplasmic or perinuclear viral inclusions to the cell surface via interactions with regulators of the dynamics and assembly of actin cytoskeleton such as host IQGAP1. Plays also a critical role in the final steps of viral release by interacting with host members of the vacuolar protein-sorting pathway (VPS) such as host VPS4 and by using other cellular proteins involved in vesicle formation pathway including PDCD6IP/ALIX, NEDD4 or TGS101. UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Exists as a dimer until it reorganizes at the plasma membrane into a hexameric form using phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) (PubMed:26753796, PubMed:29950600). Interacts with host TSG101. Homo-hexamer interacts with the WW domain 3 of host NEDD4. Interacts with the nucleoprotein/NP. Interacts (via YPx(n)L/I motif) with host PDCD6IP/ALIX; this interaction supports efficient egress of viral particles (PubMed:25786915). Interacts with VP35 (PubMed:16698994). Interacts with host ITCH; this interaction is required for efficient egress (PubMed:27489272). UniProt
Late-budding domains (L domains) are short sequence motifs essential for viral particle budding. They recruit proteins of the host ESCRT machinery (Endosomal Sorting Complex Required for Transport) or ESCRT-associated proteins. VP40 contains two overlapping L domains: a PTAP/PSAP motif, which interacts with the UEV domain of TSG101 and a PPXY motif which interacts with the WW domain 3 of NEDD4. UniProt
  • Other Gene names: VP40
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