Protein P4 of the Bacteriophage Phi 6 Procapsid Has a Nucleoside Triphosphate-binding Site with Associated Nucleoside Triphosphate Phosphohydrolase Activity
Overview
Authors
Affiliations
Bacteriophage phi 6 contains three segments of double-stranded RNA. The procapsid consists of proteins P1, P2, P4, and P7, which are encoded by the viral L segment. cDNA copies of this segment have been cloned into plasmids that direct the production of these proteins, which assemble into polyhedral procapsids. These procapsids are capable of packaging plus-sense phi 6 RNA in the presence of nucleoside triphosphate and synthesizing the complementary minus strand to form double-stranded RNA. In this article, we report the presence of a nucleotide-binding site in protein P4. The viral procapsid and nucleocapsid exhibit a nucleoside triphosphate phosphohydrolase activity that converts nucleoside triphosphates into nucleoside diphosphates.
Structural Studies of Bacteriophage Φ6 and Its Transformations during Its Life Cycle.
Heymann J Viruses. 2023; 15(12).
PMID: 38140645 PMC: 10747372. DOI: 10.3390/v15122404.
RNA Packaging in the Bacteriophages: Dynamic Interactions during Capsid Maturation.
Gottlieb P, Alimova A Int J Mol Sci. 2022; 23(5).
PMID: 35269819 PMC: 8910881. DOI: 10.3390/ijms23052677.
Single-molecule measurements of viral ssRNA packaging.
Hanhijarvi K, Ziedaite G, Bamford D, Haeggstrom E, Poranen M RNA. 2016; 23(1):119-129.
PMID: 27803153 PMC: 5159644. DOI: 10.1261/rna.057471.116.
Structural explanation for the role of Mn2+ in the activity of phi6 RNA-dependent RNA polymerase.
Poranen M, Salgado P, Koivunen M, Wright S, Bamford D, Stuart D Nucleic Acids Res. 2008; 36(20):6633-44.
PMID: 18940872 PMC: 2582606. DOI: 10.1093/nar/gkn632.
In vivo studies of genomic packaging in the dsRNA bacteriophage Phi8.
Qiao J, Qiao X, Mindich L BMC Microbiol. 2005; 5:10.
PMID: 15762996 PMC: 1079848. DOI: 10.1186/1471-2180-5-10.