Protein Nucleotidylylation in +ssRNA Viruses
Overview
Affiliations
Nucleotidylylation is a post-transcriptional modification important for replication in the picornavirus supergroup of RNA viruses, including members of the , , and virus families. This modification occurs when the RNA-dependent RNA polymerase (RdRp) attaches one or more nucleotides to a target protein through a nucleotidyl-transferase reaction. The most characterized nucleotidylylation target is VPg (viral protein genome-linked), a protein linked to the 5' end of the genome in , and . The nucleotidylylation of VPg by RdRp is a critical step for the VPg protein to act as a primer for genome replication and, in and for the initiation of translation. In contrast, do not express a VPg protein, but the nucleotidylylation of proteins involved in replication initiation is critical for genome replication. Furthermore, the RdRp proteins of the viruses that perform nucleotidylylation are themselves nucleotidylylated, and in the case of coronavirus, this has been shown to be essential for viral replication. This review focuses on nucleotidylylation within the picornavirus supergroup of viruses, including the proteins that are modified, what is known about the nucleotidylylation process and the roles that these modifications have in the viral life cycle.
The Disorderly Nature of Caliciviruses.
Young V, McSweeney A, Edwards M, Ward V Viruses. 2024; 16(8).
PMID: 39205298 PMC: 11360831. DOI: 10.3390/v16081324.
Multiple functions of the nonstructural protein 3D in picornavirus infection.
Xu C, Wang M, Cheng A, Yang Q, Huang J, Ou X Front Immunol. 2024; 15:1365521.
PMID: 38629064 PMC: 11018997. DOI: 10.3389/fimmu.2024.1365521.
The mystery remains: How do potyviruses move within and between cells?.
Xue M, Arvy N, German-Retana S Mol Plant Pathol. 2023; 24(12):1560-1574.
PMID: 37571979 PMC: 10632792. DOI: 10.1111/mpp.13383.
Warsaba R, Stoynov N, Moon K, Flibotte S, Foster L, Jan E J Virol. 2022; 96(17):e0069922.
PMID: 35993738 PMC: 9472611. DOI: 10.1128/jvi.00699-22.
Persistent Enterovirus Infection: Little Deletions, Long Infections.
Chapman N Vaccines (Basel). 2022; 10(5).
PMID: 35632526 PMC: 9143164. DOI: 10.3390/vaccines10050770.