Zika virus produces noncoding RNAs using a multi-pseudoknot structure that confounds a cellular exonuclease
- Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, Dept. of Biochemistry and Molecular Genetics
- Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, Dept. of Biochemistry and Molecular Genetics; Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, Howard Hughes Medical Inst. (HHMI); Univ. of California, Davis, CA (United States). School of Veterinary Medicine
- Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, Dept. Medicine, Division of Infectious Diseases
- Univ. of Texas, Galveston, TX (United States). Medical Branch, Dept. of Biochemistry and Molecular Biology
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS), Molecular Biology Consortium
- Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, Dept. of Biochemistry and Molecular Genetics; Univ. of Colorado, Aurora, CO (United States). Denver School of Medicine, RNA BioScience Initiative
The outbreak of Zika virus (ZIKV) and associated fetal microcephaly mandates efforts to understand the molecular processes of infection. Related flaviviruses produce noncoding subgenomic flaviviral RNAs (sfRNAs) that are linked to pathogenicity in fetal mice. These viruses make sfRNAs by co-opting a cellular exonuclease via structured RNAs called xrRNAs. We found that ZIKV-infected monkey and human epithelial cells, mouse neurons, and mosquito cells produce sfRNAs. The RNA structure that is responsible for ZIKV sfRNA production forms a complex fold that is likely found in many pathogenic flaviviruses. Mutations that disrupt the structure affect exonuclease resistance in vitro and sfRNA formation during infection. The complete ZIKV xrRNA structure clarifies the mechanism of exonuclease resistance and identifies features that may modulate function in diverse flaviviruses.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1411558
- Journal Information:
- Science, Journal Name: Science Journal Issue: 6316 Vol. 354; ISSN 0036-8075
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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