Origin of viruses: primordial replicators recruiting capsids from hosts

@article{Krupovic2019OriginOV,
  title={Origin of viruses: primordial replicators recruiting capsids from hosts},
  author={Mart Krupovic and Valerian V. Dolja and Eugene V. Koonin},
  journal={Nature Reviews Microbiology},
  year={2019},
  volume={17},
  pages={449-458}
}
Viruses are ubiquitous parasites of cellular life and the most abundant biological entities on Earth. It is widely accepted that viruses are polyphyletic, but a consensus scenario for their ultimate origin is still lacking. Traditionally, three scenarios for the origin of viruses have been considered: descent from primordial, precellular genetic elements, reductive evolution from cellular ancestors and escape of genes from cellular hosts, achieving partial replicative autonomy and becoming… 
View on Springer
hal-pasteur.archives-ouvertes.fr
101 Citations
Highly Influential Citations
6
Background Citations
36
Methods Citations
1
Results Citations
6

101 Citations

The logic of virus evolution.
Cellular homologs of the double jelly-roll major capsid proteins clarify the origins of an ancient virus kingdom
TLDR
The results of this work indicate that virus kingdoms Bamfordvirae, with the DJR-MCPs, and Helvetiavirae that possess two SJRs, have distinct origins, suggesting a reappraisal of the realm Varidnaviria.
A Place for Viruses on the Tree of Life
TLDR
When deciding how, if, and where viruses should be placed on the Tree of Life, it is important that the Tree functions best as a model of biological evolution on Earth, and it isimportant that models themselves evolve with the authors' increasing understanding of biological systems.
Virus-induced cell gigantism and asymmetric cell division in archaea
TLDR
It is shown how an archaeal virus manipulates the cell cycle, transforming the cell into a giant virion-producing factory, and suggests that CRISPR-Cas is the primary defense system in Sulfolobus against STSV2.
New Vista into Origins of Viruses from a Prototypic ssDNA Phage
TLDR
The minimalistic structure of ΦCjT23 suggests that this phage serves as a model for the last common ancestor between ssDNA and dsDNA viruses in the Bamfordvirae, suggesting that these types of viruses have a global distribution and shared evolutionary origin.
Global Organization and Proposed Megataxonomy of the Virus World
TLDR
Phylogenetic analyses of virus hallmark genes combined with analyses of gene-sharing networks show that replication modules of five BCs evolved from a common ancestor that encoded an RNA-directed RNA polymerase or a reverse transcriptase, and propose a comprehensive hierarchical taxonomy of viruses.
Primordial Capsid and Spooled ssDNA Genome Structures Unravel Ancestral Events of Eukaryotic Viruses
TLDR
The first atomic structure of a bacilladnavirus capsid is presented, which revealed that the capsid protein gene presumably was acquired from a ssRNA virus in early evolutionary events and the structural organization of a ssDNA genome is revealed, which retains a spooled arrangement that previously only been observed for double-stranded viruses.
Viruses as a survival strategy in the armory of life.
TLDR
In this chapter, new studies relating to the origins of biological systems suggest that viruses could also have originated during the transition from First to the Last Universal Common Ancestor (from FUCA to LUCA).
A scenario for the emergence of protoviroids in the RNA world and for their further evolution into viroids and viroid-like RNAs by modular recombinations and mutations
TLDR
Comparison of evidence supporting a general and modular evolutionary model for viroids and viroid-like RNAs with that favoring alternative scenarios provides reasonable reasons to keep alive the hypothesis that these small RNA pathogens may be relics of a precellular world.
The LUCA and its complex virome
The last universal cellular ancestor (LUCA) is the most recent population of organisms from which all cellular life on Earth descends. The reconstruction of the genome and phenotype of the LUCA is a…
...
...

References

SHOWING 1-10 OF 156 REFERENCES
Multiple origins of viral capsid proteins from cellular ancestors
TLDR
It is suggested that, although the replication modules of at least some classes of viruses might descend from primordial selfish genetic elements, bona fide viruses evolved on multiple, independent occasions throughout the course of evolution by the recruitment of diverse host proteins that became major virion components.
The origin of viruses and their possible roles in major evolutionary transitions.
Virus World as an Evolutionary Network of Viruses and Capsidless Selfish Elements
TLDR
The concept of a greater virus world which forms an evolutionary network that is held together by shared conserved genes and includes both bona fide capsid-encoding viruses and different classes of capsidless replicons is developed.
A virocentric perspective on the evolution of life
Origins and evolution of viruses of eukaryotes: The ultimate modularity
The origin of viruses.
The precellular scenario of genovirions
A new hypothesis of the ancestors of contemporary viruses, the genovirions is proposed. This concept emphasizes the close connection between the evolution of viruses and the proto-cells. Recent and…
Networks of evolutionary interactions underlying the polyphyletic origin of ssDNA viruses.
The Origin of Virions and Virocells: The Escape Hypothesis Revisited
TLDR
This updated version of the escape hypothesis suggests a working program to tackle the question of virus origin, and shows how accumulating data in structural biology combined to new virus definitions allow rejecting the first two hypotheses.
A phylogenomic data-driven exploration of viral origins and evolution
TLDR
An ancient origin of the “viral supergroup” is established and the existence of widespread episodes of horizontal transfer of genetic information is established if one considers viruses to have originated from ancient cells and not from modern counterparts.
...
...