Here, we report a novel ourmia-like mycovirus, named "Phomopsis asparagi magoulivirus 1" (PaMV1), derived from the phytopathogenic fungus Phomopsis asparagi. The genome of PaMV1 consists of a positive-sense single-stranded RNA (+ ssRNA) that is 2,639 nucleotides in length, with a GC content of 57.13%. It contains a single open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) consisting of 686 amino acids with a molecular mass of 78.57 kDa. Phylogenetic analysis based on RdRp sequences revealed that PaMV1 grouped together with Diaporthe gulyae magoulivirus 1 (DgMV1) in a distinct clade. Sequence comparisons and phylogenetic analysis suggest that PaMV1 is a novel member of the genus Magoulivirus, family Botourmiaviridae.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1007/s00705-024-06084-6 | DOI Listing |
Virus Res
December 2024
USDA-ARS, Application Technology Research Unit, Wooster, OH, United States. Electronic address:
Diaporthe gulyae and D. helianthi cause Phomopsis stem canker, which is a yield-limiting fungal disease of sunflower (Helianthus annuus L.) in the United States.
View Article and Find Full Text PDFAn unusual family of bifunctional terpene synthases has been discovered in which both catalytic domains - a prenyltransferase and a cyclase - are connected by a long, flexible linker. These enzymes are unique to fungi and catalyze the first committed steps in the biosynthesis of complex terpenoid natural products: the prenyltransferase assembles 5-carbon precursors to form C geranylgeranyl diphosphate (GGPP), and the cyclase converts GGPP into a polycyclic hydrocarbon product. Weak domain-domain interactions as well as linker flexibility render these enzymes refractory to crystallization and challenge their visualization by cryo-EM.
View Article and Find Full Text PDFPlant Dis
December 2024
USDA-ARS Plains Area, Edward T. Schafer Agricultural Research Center, Sunflower Improvement Research Unit, Fargo, North Dakota, United States;
Cultivated sunflower (Helianthus annuus L.) is a globally important oilseed crop that is grown primarily in the Northern Great Plains region of the United States. In September 2018, sunflower stems exhibiting brown stem lesions centered on the leaf axils and accompanied by pith degradation, consistent with symptoms of Phomopsis stem canker (PSC) disease, were sampled from a commercial field of approximately 520 hectares in Polk County, MN (47°50'24" N, 96.
View Article and Find Full Text PDFLangmuir
December 2024
State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
J Fungi (Basel)
November 2024
Department of Phytopathology, Institute of Phytomedicine, Faculty of Agricultural Sciences, University of Hohenheim, 70599 Stuttgart, Germany.
(anamorph: ) species are endophytes or fungal pathogens for many different plant species. Soybean () can be infected by many different species; among them, and are responsible for the most significant damages. is a species that was only recently described and has so far been found on sunflower () in Australia and an unknown host in Thailand.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!