数字农科院2.0

Host-similar fragments in the African swine fever virus genome: distribution, functions, and evolution

文献类型： 外文期刊

作者： Zhu, Zhaozhong;Li, Na;Sun, Qin;Long, Xizi;Wang, Tao;Qiu, Hua-Ji

作者机构：

关键词： African swine fever virus;host-similar fragments;similarity network;evolution;recombination

期刊名称： VETERINARY RESEARCH

ISSN： 0928-4249

年卷期： 2025 年 56 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： African swine fever virus (ASFV) predominantly infects Argasidae and suids, resulting in high morbidity and mortality in pigs. Despite the crucial role that viral sequences resembling those of the host play in the virus's survival, there are limited comprehensive studies on the genomic similarities between ASFV and its hosts. Consequently, this study employs homology analysis to construct a similarity network between ASFV and its hosts (Argasidae and suids), investigating the distribution, function, evolution, and origins of these similar sequences in ASFV. Our findings indicate that the host-similar fragments are mainly distributed between positions 70000 and 180000 of the ASFV genome, primarily within non-coding regions. Notably, these non-coding fragments are often associated with promoter functions. Furthermore, the analysis of suid proteins that share similarities with ASFV proteins reveals that they predominantly exhibit RNA polymerase activity and are involved in metabolic processes. Evolutionary analysis indicates that pan-similar sequences of ASFV exist in an open state, highlighting the diversity of these analogous sequences. Additionally, a positive correlation was identified between the occurrence of recombination breakpoints and similar sequences, indicating that homologous recombination may serve as a crucial mechanism driving the formation of these analogous sequences.

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