Genome polyprotein - P27409 (POLG_FCVF9)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for P27409: 1
NTPase presumably plays a role in replication. Despite having similarities with helicases, does not seem to display any helicase activity. (data source: UniProt  )
Viral genome-linked protein is covalently linked to the 5'-end of the positive-strand, negative-strand genomic RNAs and subgenomic RNA. Acts as a genome-linked replication primer. May recruit ribosome to viral RNA thereby promoting viral proteins translation. (data source: UniProt  )
Protease-polymerase p76 processes the polyprotein: Pro-Pol is first released by autocleavage, then all other proteins are cleaved. Cleaves host translation initiation factor eIF4G1, eIF4G2 and PABP1 thereby inducing a shutdown of host protein synthesis. This shutdown may not prevent viral mRNA from being translated since viral Vpg replaces the cap. May cleave host polyadenylate-binding protein thereby inhibiting cellular translation. It is also an RNA-directed RNA polymerase which replicates genomic and antigenomic viral RNA by recognizing specific signals. Transcribes also a subgenomic mRNA by initiating RNA synthesis internally on antigenomic RNA. This sgRNA codes for structural proteins. Catalyzes the covalent attachment VPg with viral RNAs. (data source: UniProt  )
Catalytic Activity

Nucleoside triphosphate + RNAn = diphosphate + RNAn+1.

(data source: UniProt  )
Subunit structure
Protein p32: homodimer, interacts with NTPase, protein p30 and Pro-Pol. Viral genome-linked protein interacts with capsid protein and Pro-Pol. Protease-polymerase p76: Homooligomers, interacts with Vpg, protein p32 and may interact with capsid protein. (data source: UniProt  )
Protease-polymerase is composed of two domains displaying two different catalytic activity. These activities may act independently. (data source: UniProt  )
Other Gene name: ORF1
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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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