PT  - JOURNAL ARTICLE
AU  - Sergey Y. Morozov
AU  - Andrey G. Solovyev
TI  - ORIGIN OF THREE RELATED MOVEMENT GENE MODULES IN PLANT VIRUSES: EVOLUTIONARY RADIATIONS OF BENYVIRUS-LIKE RNA REPLICONS
AID  - 10.1101/2022.01.19.477018
DP  - 2022 Jan 01
TA  - bioRxiv
PG  - 2022.01.19.477018
4099  - http://biorxiv.org/content/early/2022/01/21/2022.01.19.477018.short
4100  - http://biorxiv.org/content/early/2022/01/21/2022.01.19.477018.full
AB  - Previous studies have shown that the RNA genomes of some plant viruses encode two related genetic modules required for the virus movement over host body, containing 2 or 3 genes and named as triple gene block (TGB) and binary movement block (BMB). In this paper, we revealed a novel related movement gene module, called Tetra-Cistron Movement Block (TCMB). It was found to be encoded by virus-like transcriptome assemblies of moss Dicranum scoparium and Antarctic flowering plant Colobanthus quitensis. These TCMBs are encoded by second RNA components of the putative two-component viruses related to plant benyviruses. First, like RNA-2 of benyviruses, TCMB RNA-2 contains the 5’-terminal coat protein gene. Second, general organization of TCMB is very similar to TGB: it includes RNA helicase gene which is followed by two small overlapping cistrons encoding hydrophobic proteins with a distant sequence similarity to TGB2 and TGB3 genes. However, TCMB includes also forth 5’-terminal gene coding for protein with an obvious similarity to double-stranded RNA-binding proteins belonging to the DSRM_AtDRB-like superfamily. Finally, we suggest the proposed involvement of replicative beny-like helicases in evolution of the BMB and TCMB movement genetic modules.Competing Interest StatementThe authors have declared no competing interest.