Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses

“Crucivirus” represents a group of viruses with chimeric genomes, significant for viral evolution and recombination studies. Their capsid proteins share homology with the RNA virus tombusvirus, while their replicase-associated proteins are homologous to a class of single-stranded DNA viruses, namely...

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Main Authors: Hong-Sai Zhang, Chang Liu, Guang-Feng Liu, Yu-Yu Chen, Peng Zhu, Xin Xu, Bing-Xin Yin, Jing-Zhe Jiang
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-02-01
Series:Frontiers in Microbiology
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Online Access:https://www.frontiersin.org/articles/10.3389/fmicb.2025.1454079/full
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author Hong-Sai Zhang
Hong-Sai Zhang
Chang Liu
Guang-Feng Liu
Yu-Yu Chen
Peng Zhu
Peng Zhu
Xin Xu
Bing-Xin Yin
Jing-Zhe Jiang
Jing-Zhe Jiang
author_facet Hong-Sai Zhang
Hong-Sai Zhang
Chang Liu
Guang-Feng Liu
Yu-Yu Chen
Peng Zhu
Peng Zhu
Xin Xu
Bing-Xin Yin
Jing-Zhe Jiang
Jing-Zhe Jiang
author_sort Hong-Sai Zhang
collection DOAJ
description “Crucivirus” represents a group of viruses with chimeric genomes, significant for viral evolution and recombination studies. Their capsid proteins share homology with the RNA virus tombusvirus, while their replicase-associated proteins are homologous to a class of single-stranded DNA viruses, namely CRESS DNA viruses. This study identifies seven novel crucivirus genomes from oysters cultivated along the coast of the South China Sea. Phylogenetic analysis reveals that five sequences form a distinct branch, which may indicate the presence of a new subclass within the crucivirus family. We analyzed crucivirus from multiple perspectives, including viral genomes, hallmark proteins, sequence similarity, and potential hosts. The results indicate that the crucivirus genomes and replicase-associated proteins (Rep) from oysters conform to the typical characteristics of crucivirus; Crucivirus Rep appears to have a direct parallel origin from multiple clades of CRESS DNA viruses, while only the S-domain of their capsid proteins shows some evolutionary relationship with tombusvirus. We found protein sequences in rotifers that are highly similar to the Cap three-dimensional structure of crucivirus, which may suggest host relevance. Overall, this study provides new insights into the classification, evolution, and host origins of crucivirus.
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institution Kabale University
issn 1664-302X
language English
publishDate 2025-02-01
publisher Frontiers Media S.A.
record_format Article
series Frontiers in Microbiology
spelling doaj-art-cb4e4d16ff9644e48f4fc546990515592025-02-04T06:32:06ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2025-02-011610.3389/fmicb.2025.14540791454079Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated virusesHong-Sai Zhang0Hong-Sai Zhang1Chang Liu2Guang-Feng Liu3Yu-Yu Chen4Peng Zhu5Peng Zhu6Xin Xu7Bing-Xin Yin8Jing-Zhe Jiang9Jing-Zhe Jiang10College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaLivestock, Aquaculture and Technology Promotion and Service Center of Conghua District, Guangzhou, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, ChinaCollege of Fisheries and Life Science, Shanghai Ocean University, Shanghai, ChinaKey Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China“Crucivirus” represents a group of viruses with chimeric genomes, significant for viral evolution and recombination studies. Their capsid proteins share homology with the RNA virus tombusvirus, while their replicase-associated proteins are homologous to a class of single-stranded DNA viruses, namely CRESS DNA viruses. This study identifies seven novel crucivirus genomes from oysters cultivated along the coast of the South China Sea. Phylogenetic analysis reveals that five sequences form a distinct branch, which may indicate the presence of a new subclass within the crucivirus family. We analyzed crucivirus from multiple perspectives, including viral genomes, hallmark proteins, sequence similarity, and potential hosts. The results indicate that the crucivirus genomes and replicase-associated proteins (Rep) from oysters conform to the typical characteristics of crucivirus; Crucivirus Rep appears to have a direct parallel origin from multiple clades of CRESS DNA viruses, while only the S-domain of their capsid proteins shows some evolutionary relationship with tombusvirus. We found protein sequences in rotifers that are highly similar to the Cap three-dimensional structure of crucivirus, which may suggest host relevance. Overall, this study provides new insights into the classification, evolution, and host origins of crucivirus.https://www.frontiersin.org/articles/10.3389/fmicb.2025.1454079/fullcrucivirusCRESS DNA virusesvirus evolutionhostgenomeoyster
spellingShingle Hong-Sai Zhang
Hong-Sai Zhang
Chang Liu
Guang-Feng Liu
Yu-Yu Chen
Peng Zhu
Peng Zhu
Xin Xu
Bing-Xin Yin
Jing-Zhe Jiang
Jing-Zhe Jiang
Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
Frontiers in Microbiology
crucivirus
CRESS DNA viruses
virus evolution
host
genome
oyster
title Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
title_full Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
title_fullStr Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
title_full_unstemmed Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
title_short Exploring the recombinant evolution and hosts of crucivirus based on novel oyster-associated viruses
title_sort exploring the recombinant evolution and hosts of crucivirus based on novel oyster associated viruses
topic crucivirus
CRESS DNA viruses
virus evolution
host
genome
oyster
url https://www.frontiersin.org/articles/10.3389/fmicb.2025.1454079/full
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