Data mining sheds light on a novel family of plant-associated negative-sense RNA viruses linked to lispiviruses
- 1INTA, Argentina
Abstract
Large-scale mining of public transcriptomic datasets can reveal viral diversity that remains invisible to conventional virus-surveillance approaches, while increasingly powerful structure-prediction methods provide a complementary route to characterizing highly divergent viral proteins. Here, we combine sequence detection, phylogenetic analysis, structural prediction, and host-association analyses to investigate the cryptic diversity and biology of a new clade of plant-associated lispi-like viruses. Analyses of RNA-sequencing datasets identified and enabled assembly of 87 lispi-like virus genomes associated with 75 plant hosts, expanding the known diversity of this new group by approximately 40-fold. The viruses share a conserved four-cistron genome organization, 3'-N-P2-P3-L-5'. Structural analyses provide functional insights into the four conserved proteins. P1 (N) adopts a canonical negative-strand RNA virus nucleocapsid architecture with conserved RNA-interacting residues and a predicted RNA-packaging configuration. P2 is exceptionally divergent; although a subset of structures resembles the ITPase/HAM1 fold. P3 forms a conserved trimeric coiled-coil architecture reminiscent of a viral fusion-protein stalk, but lacks the family-wide sequence features expected of a canonical membrane glycoprotein. P4 contains a structurally resolved Mononegavirales-type RNA-dependent-RNA-polymerase (RdRp) core with invariant catalytic motifs, including the characteristic GDN signature, whereas its accessory regions are substantially more divergent. Phylogenetic insights form a distinct monophyletic lineage sister to the predominantly invertebrate-associated Lispiviridae, supporting their recognition as a new proposed family Masuviridae, comprising 15 tentative genera. Genus-level clustering is accompanied by marked differences in host association, ranging from strong specialization to broader host ranges. Retrospective screening of public sequencing libraries further identified lispi-like virus sequences in 1,536 libraries representing 134 plant species, 11 plant families and 182 geographic locations, highlighting a substantial and geographically widespread cryptic virome. Together, these results establish Masuviridae as a deeply divergent lineage of plant-associated negative-sense RNA viruses and illustrate how the integration of sequence, structural, and large-scale transcriptomic analyses can move viral dark matter from detection towards evolutionary and functional characterization.
Versions
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BibTeX
@misc{bejerman2026data,
title = {{Data mining sheds light on a novel family of plant-associated negative-sense RNA viruses linked to lispiviruses}},
author = {N. Bejerman and D. Huebert and R. Alvarez-Quinto and D. Quito-Avila and H. Debat},
howpublished = {bioRxiv},
year = {2026},
month = sep,
doi = {10.64898/2026.09.18.752651},
url = {https://www.biorxiv.org/content/10.64898/2026.09.18.752651v1},
note = {CC BY-NC-ND},
}
RIS
TY - UNPB
TI - Data mining sheds light on a novel family of plant-associated negative-sense RNA viruses linked to lispiviruses
AU - N. Bejerman
AU - D. Huebert
AU - R. Alvarez-Quinto
AU - D. Quito-Avila
AU - H. Debat
PY - 2026
DA - 2026/09/18
PB - bioRxiv
DO - 10.64898/2026.09.18.752651
UR - https://www.biorxiv.org/content/10.64898/2026.09.18.752651v1
AB - Large-scale mining of public transcriptomic datasets can reveal viral diversity that remains invisible to conventional virus-surveillance approaches, while increasingly powerful structure-prediction methods provide a complementary route to characterizing highly divergent viral proteins. Here, we combine sequence detection, phylogenetic analysis, structural prediction, and host-association analyses to investigate the cryptic diversity and biology of a new clade of plant-associated lispi-like viruses. Analyses of RNA-sequencing datasets identified and enabled assembly of 87 lispi-like virus genomes associated with 75 plant hosts, expanding the known diversity of this new group by approximately 40-fold. The viruses share a conserved four-cistron genome organization, 3'-N-P2-P3-L-5'. Structural analyses provide functional insights into the four conserved proteins. P1 (N) adopts a canonical negative-strand RNA virus nucleocapsid architecture with conserved RNA-interacting residues and a predicted RNA-packaging configuration. P2 is exceptionally divergent; although a subset of structures resembles the ITPase/HAM1 fold. P3 forms a conserved trimeric coiled-coil architecture reminiscent of a viral fusion-protein stalk, but lacks the family-wide sequence features expected of a canonical membrane glycoprotein. P4 contains a structurally resolved Mononegavirales-type RNA-dependent-RNA-polymerase (RdRp) core with invariant catalytic motifs, including the characteristic GDN signature, whereas its accessory regions are substantially more divergent. Phylogenetic insights form a distinct monophyletic lineage sister to the predominantly invertebrate-associated Lispiviridae, supporting their recognition as a new proposed family Masuviridae, comprising 15 tentative genera. Genus-level clustering is accompanied by marked differences in host association, ranging from strong specialization to broader host ranges. Retrospective screening of public sequencing libraries further identified lispi-like virus sequences in 1,536 libraries representing 134 plant species, 11 plant families and 182 geographic locations, highlighting a substantial and geographically widespread cryptic virome. Together, these results establish Masuviridae as a deeply divergent lineage of plant-associated negative-sense RNA viruses and illustrate how the integration of sequence, structural, and large-scale transcriptomic analyses can move viral dark matter from detection towards evolutionary and functional characterization.
ER -