Search results for "Viral rna"
showing 5 items of 5 documents
Engineered Functional Redundancy Relaxes Selective Constraints upon Endogenous Genes in Viral RNA Genomes
2018
Functional redundancy, understood as the functional overlap of different genes, is a double-edge sword. At the one side, it is thought to serve as a robustness mechanism that buffers the deleterious effect of mutations hitting one of the redundant copies, thus resulting in pseudogenization. At the other side, it is considered as a source of genetic and functional innovation. In any case, genetically redundant genes are expected to show an acceleration in the rate of molecular evolution. Here, we tackle the role of functional redundancy in viral RNA genomes. To this end, we have evaluated the rates of compensatory evolution for deleterious mutations affecting an essential function, the suppr…
Undetectable viral RNA from SARS-CoV-2 in endometrial biopsies from women with COVID-19: a preliminary study.
2022
O-142 COVID19-free endometrium: Undetectable viral RNA in endometrial biopsies from positive symptomatic SARS-CoV-2 women
2021
Abstract Study question Does SARS-CoV-2 infect the endometrial tissue in women with coronavirus disease 2019 (COVID-19)? Summary answer Symptomatic women with COVID-19 report no presence, in the short term, of viral RNA from SARS-CoV-2 in the endometrium. What is known already The recent emergence of COVID-19, caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has not allowed yet to establish putative relations between this disorder and other existing pathologies. It is the case with fertility problems and the reproductive organs, including a possible endometrial disorder caused by the virus. Thus, an important step is to elucidate the viral presence in different hu…
Retrospective screening for SARS-CoV-2 among influenza-like illness hospitalizations: 2018-2019 and 2019-2020 seasons, Valencia region, Spain
2021
Este artículo se encuentra disponible en la siguiente URL: https://onlinelibrary.wiley.com/doi/epdf/10.1111/irv.12899 En este artículo de investigación también participan: Juan Mollar-Maseres, Germán Schwarz-Chavarri, Sandra García-Esteban, Joan Puig-Barberà, Javier Díez-Domingo y F. Xavier López-Labrador. On 9 March 2020, the World Health Organization (WHO) Global Influenza Programme (GIP) asked participant sites on the Global Influenza Hospital Surveillance Network (GIHSN) to contribute to data collection concerning severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We re-analysed 5833 viral RNA archived samples collected prospectively from hospital admissions for influenza-lik…
The structure of a native orthobunyavirus ribonucleoprotein reveals a key role for viral RNA in maintaining its helical architecture
2021
AbstractThe Bunyavirales order of RNA viruses comprises emerging pathogens for which approved preventative or therapeutic measures for human use are not available. The genome of all Bunyavirales consists of negative-sense RNA segments wrapped by the virus-encoded nucleocapsid protein (NP) to form ribonucleoproteins (RNPs). RNPs represent the active template for RNA synthesis and the form in which the genome is packaged into virions, functions that require inherent flexibility. We present a pseudo-atomic model of a native RNP purified from Bunyamwera virus (BUNV), the prototypical Bunyavirales member, based on a cryo-electron microscopy (cryo-EM) average at 13 Å resolution with subsequent fi…