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RING finger protein Z - O73557 (Z_LASSJ)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Number of PDB entries for O73557: 1
 
Function
Plays a crucial role in virion assembly and budding. Expressed late in the virus life cycle, it acts as an inhibitor of viral transcription and RNA synthesis by interacting with the viral polymerase L (By similarity). Presumably recruits the NP encapsidated genome to cellular membranes at budding sites via direct interaction with NP. Plays critical roles in the final steps of viral release by interacting with host TSG101, a member of the vacuolar protein-sorting pathway and using other cellular host proteins involved in vesicle formation pathway. The budding of the virus progeny occurs after association of protein Z with the viral glycoprotein complex SSP-GP1-GP2 at the cell periphery, step that requires myristoylation of protein Z. Also selectively represses protein production by associating with host eIF4E. (data source: UniProt  )
Subunit structure
Interacts with protein NP; this interaction probably directs the encapsidated genome to budding sites (By similarity). Interacts (via RING domain) with polymerase L; this interaction inhibits viral transcription and replication (By similarity). Interacts with the glycoprotein complex; this interaction plays a role in virion budding. Interacts with host eIF4E; this interaction results in eIF4E reduced affinity for its substrate, the 5'-m7 G cap structure. Interacts (via late-budding domain) with host TSG101; this interaction is essential for budding and release of viral particles. Interacts with host RPLP0; this interaction may serve to load ribosome-like particles inside the virion. Interacts with host PML; this interaction induces PML bodies redistribution in the cytoplasm upon viral infection. (data source: UniProt  )
Domain
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. Ring-finger protein Z contains two L domains: a PTAP/PSAP motif which interacts with the UEV domain of TSG101, and a PPXY motif which probably binds to the WW domains of HECT (homologous to E6-AP C-terminus) E3 ubiquitin ligases. (data source: UniProt  )
UniProtKB:
Species: 
Gene name: Z
Length:
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Data origin/color codes
The vertical color bar on the left side indicates data provenance.
Data in green originates from UniProtKB  
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
Data in red indicates combined ranges of Homology Models from SBKB   and the Protein Model Portal  

The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).