Genomic Signatures of Coevolution between Nonmodel Mammals and Parasitic Roundworms.
Antagonistic coevolution between host and parasite drives species evolution. However, most of the studies only focus on parasitism adaptation and do not explore the coevolution mechanisms from the perspective of both host and parasite. Here, through the de novo sequencing and assembly of the genomes of giant panda roundworm, red panda roundworm, and lion roundworm parasitic on tiger, we investigated the genomic mechanisms of coevolution between nonmodel mammals and their parasitic roundworms and those of roundworm parasitism in general. The genome-wide phylogeny revealed that these parasitic roundworms have not phylogenetically coevolved with their hosts. The CTSZ and prolyl 4-hydroxylase subunit beta (P4HB) immunoregulatory proteins played a central role in protein interaction between mammals and parasitic roundworms. The gene tree comparison identified that seven pairs of interactive proteins had consistent phylogenetic topology, suggesting their coevolution during host-parasite interaction. These coevolutionary proteins were particularly relevant to immune response. In addition, we found that the roundworms of both pandas exhibited higher proportions of metallopeptidase genes, and some positively selected genes were highly related to their larvae's fast development. Our findings provide novel insights into the genetic mechanisms of coevolution between nonmodel mammals and parasites and offer the valuable genomic resources for scientific ascariasis prevention in both pandas.
['Hu|Yibo|Y|', 'Yu|Lijun|L|', 'Fan|Huizhong|H|', 'Huang|Guangping|G|', 'Wu|Qi|Q|', 'Nie|Yonggang|Y|', 'Liu|Shuai|S|', 'Yan|Li|L|', 'Wei|Fuwen|F|']
D000818:Animals D001199:Ascaridoidea D000073930:Biological Coevolution D049751:Genome, Helminth D006790:Host-Parasite Interactions D010802:Phylogeny D060066:Protein Interaction Maps D012641:Selection, Genetic D046010:Tigers D001503:Ursidae
coevolution parasitism pandas comparative genomics