Endogenous pararetroviruses: two-faced travelers in the plant genome

Staginnus, Christina; Richert-Pöggeler, Katja

doi:10.1016/j.tplants.2006.08.008

Cited by 115 publications

(103 citation statements)

References 46 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…1 and 6C) (102)(103)(104). In contrast to the case with retroviruses, integration into the host genome is not an essential stage in the reproduction cycle of these viruses, although integration is common among caulimoviruses, many of which can persist as endogenous viruses (105,106).…”

Section: Retroelements and Retroviruses: Viruses As Derived Formsmentioning

confidence: 99%

Virus World as an Evolutionary Network of Viruses and Capsidless Selfish Elements

Koonin

Dolja

2014

Microbiol Mol Biol Rev

219

211

View full text Add to dashboard Cite

SUMMARY Viruses were defined as one of the two principal types of organisms in the biosphere, namely, as capsid-encoding organisms in contrast to ribosome-encoding organisms, i.e., all cellular life forms. Structurally similar, apparently homologous capsids are present in a huge variety of icosahedral viruses that infect bacteria, archaea, and eukaryotes. These findings prompted the concept of the capsid as the virus “self” that defines the identity of deep, ancient viral lineages. However, several other widespread viral “hallmark genes” encode key components of the viral replication apparatus (such as polymerases and helicases) and combine with different capsid proteins, given the inherently modular character of viral evolution. Furthermore, diverse, widespread, capsidless selfish genetic elements, such as plasmids and various types of transposons, share hallmark genes with viruses. Viruses appear to have evolved from capsidless selfish elements, and vice versa, on multiple occasions during evolution. At the earliest, precellular stage of life's evolution, capsidless genetic parasites most likely emerged first and subsequently gave rise to different classes of viruses. In this review, we develop 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. Theoretical studies indicate that selfish replicons (genetic parasites) inevitably emerge in any sufficiently complex evolving ensemble of replicators. Therefore, the key signature of the greater virus world is not the presence of a capsid but rather genetic, informational parasitism itself, i.e., various degrees of reliance on the information processing systems of the host.

show abstract

Section: Retroelements and Retroviruses: Viruses As Derived Formsmentioning

confidence: 99%

Virus World as an Evolutionary Network of Viruses and Capsidless Selfish Elements

Koonin

Dolja

2014

Microbiol Mol Biol Rev

219

211

View full text Add to dashboard Cite

show abstract

“…To date, EPRVs have been described in nine distantly related mono-and dicotyledonous plant families. Each originated from independent integration events from five of the six genera of the Caulimoviridae family (49,63,64). Although most EPRVs are probably eliminated from the plant genome, they can also be retained through an endogenization process.…”

mentioning

confidence: 99%

Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Gayral

Blondin

Guidolin

et al. 2010

J Virol

View full text Add to dashboard Cite

. Although eBSVs probably arose from accidental events, infectious eBSVs constitute an extreme case of parasitism, as well as a newly described strategy for vertical virus transmission in plants. We investigated the early evolutionary stages of infectious eBSV for two distinct BSV species-GF (BSGFV) and Imové (BSImV)-through the study of their distribution, insertion polymorphism, and structure evolution among selected banana genotypes representative of the diversity of 60 wild Musa species and genotypes. To do so, the historical frame of host evolution was analyzed by inferring banana phylogeny from two chloroplast regions-matK and trnL-trnF-as well as from the nuclear genome, using 19 microsatellite loci. We demonstrated that both BSV species integrated recently in banana evolution, circa 640,000 years ago. The two infectious eBSVs were subjected to different selective pressures and showed distinct levels of rearrangement within their final structure. In addition, the molecular phylogenies of integrated and nonintegrated BSVs enabled us to establish the phylogenetic origins of eBSGFV and eBSImV.

show abstract

“…The current research on what can be considered to be natural analogs of viral transgenes is focused primarily on sequences derived from dsDNA viruses, the pararetroviruses of the family Caulimoviridae. The endogenous pararetroviral sequences (EPRVs) that have been described so far are often highly degenerate, but in some cases can be activated to produce infectious virus, and thus disease (Staginnus and Richert-Pöggeler, 2006). For ssDNA viruses, represented by the family of Geminiviridae, only fragments of homologous sequences have been reported in the genome of Nicotiana spp (Murad et al, 2004).…”

Section: One Of the Communication Tools Of The Ec-fundedmentioning

confidence: 99%

“…In order to help answer these questions, the first Biosafenet Seminar focused on the convergence between what are to date two distinct areas of research: (1) EPRVs, for which it is now established that they can lead to virus emergence (Staginnus and Richert-Pöggeler, 2006), while the evidence concerning their role in virus resistance is less evident (Mette et al, 2002), and (2) VRTPs expressing viral sequences, for which there is a wealth of information on resistance mechanisms, and little information regarding their potential role in virus emergence (Prins et al, in press). The workshop brought together 27 researchers from 11 countries, most of whom work on EPRVs or VRTPs, with a few scientists working in related research areas, such as virus evolution and endogenous viral sequences of mammals and insects.…”

Section: One Of the Communication Tools Of The Ec-fundedmentioning

confidence: 99%

Possible roles of endogenous plant viral sequences and transgenes containing viral sequences in both virus resistance and virus emergence

Teycheney¹,

Tepfer

2007

Environ. Biosafety Res.

View full text Add to dashboard Cite

Endogenous pararetroviruses: two-faced travelers in the plant genome

Cited by 115 publications

References 46 publications

Virus World as an Evolutionary Network of Viruses and Capsidless Selfish Elements

Virus World as an Evolutionary Network of Viruses and Capsidless Selfish Elements

Evolution of Endogenous Sequences of Banana Streak Virus : What Can We Learn from Banana ( Musa sp.) Evolution?

Possible roles of endogenous plant viral sequences and transgenes containing viral sequences in both virus resistance and virus emergence

Contact Info

Product

Resources

About