Genome polyprotein - P03305 (POLG_FMDVO)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P03305: 6
The leader protease autocatalytically cleaves itself from the polyprotein at the L/VP0 junction. It also cleaves the host translation initiation factor EIF4G1 and EIF4G3, in order to shut down the capped cellular mRNA transcription. (data source: UniProt  )
Capsid proteins VP1, VP2, VP3 and VP4 form a closed capsid enclosing the viral positive strand RNA genome. VP4 lies on the inner surface of the protein shell formed by VP1, VP2 and VP3. All the three latter proteins contain a beta-sheet structure called beta-barrel jelly roll. Together they form an icosahedral capsid (T=3) composed of 60 copies of each VP1, VP2, and VP3, with a diameter of approximately 300 Angstroms. VP1 is situated at the 12 fivefold axes, whereas VP2 and VP3 are located at the quasi-sixfold axes. The capsid interacts with host heparan sulfate and various integrins (alphavbeta6, alphavbeta1, alphavbeta3, alpha5beta1, alphavbeta8) to provide virion attachment to target Attachment via host integrins induces virion internalization predominantly through clathrin-mediated endocytosis. In strains adapted to cell culture, attachment to heparan sulfate can also be used and induces virion internalization through clathrin- and caveolin-independent endocytosis. (data source: UniProt  )

Protein VP0: VP0 precursor is a component of immature procapsids. (data source: UniProt  )
Protein 2B: Affects membrane integrity and cause an increase in membrane permeability. (data source: UniProt  )
Protein 2C: Associates with and induces structural rearrangements of intracellular membranes. It displays RNA-binding, nucleotide binding and NTPase activities. (data source: UniProt  )
Protein 3A, via its hydrophobic domain, serves as membrane anchor. (data source: UniProt  )
Protein 3B-1, 3B-2 and 3B-3 are covalently linked to the 5'-end of both the positive-strand and negative-strand genomic RNAs. They acts as a genome-linked replication primer. (data source: UniProt  )
Protease 3C: cysteine protease that generates mature viral proteins from the precursor polyprotein. In addition to its proteolytic activity, it binds to viral RNA, and thus influences viral genome replication. RNA and substrate bind cooperatively to the protease. (data source: UniProt  )
RNA-directed RNA polymerase 3D-POL replicates genomic and antigenomic RNA by recognizing replications specific signals. (data source: UniProt  )
Catalytic Activity

Nucleoside triphosphate + RNAn = diphosphate + RNAn+1.

(data source: UniProt  )
Subunit structure
VP1 interacts (via RGD) with integrins heterodimers alphavbeta6, alphavbeta1, alphavbeta3, alpha5beta1, alphavbeta8. (data source: UniProt  )
Organism (common name): isolate Bovine/Germany/O1Kaufbeuren/1966 serotype O
Isoforms: 2, currently showing only the 'canonical' sequence.
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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 purple originates from Phosphosite  .
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).
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