水牛蛭(Hirudinaria bpling,水蛭纲:医蛭科)的染色体水平基因组组装及抗凝血蛋白注释

Chromosome-level genome assembly and anticoagulant protein annotation of the buffalo leech Hirudinaria bpling (Hirudinea: Hirudinidae).

作者信息

Khan Muhammad Salabat, Müller Christian, Zhou Baozhen

机构信息

College of Medicine, Xi'an International University, Xi'an, 71007, China.

Animal Physiology, Zoological Institute and Museum, University of Greifswald, Greifswald, 17489, Germany.

出版信息

BMC Genomics. 2025 Jun 3;26(1):558. doi: 10.1186/s12864-025-11690-y.

Abstract

This study aimed to obtain and analyze the chromosome-level genome assembly of Hirudinaria bpling, a species vital for aquatic ecosystem health and medical research. Understanding its genomic information is crucial for advancing its medical applications and elucidating its ecological role. We assembled the genome of H. bpling using a combination of PacBio HiFi long reads, Illumina sequencing, and Hi-C chromosome conformation capture techniques. This approach allowed us to achieve a high-resolution genome assembly with detailed chromosomal organization. The final genome assembly of H. bpling is 144.08 Mb, with an N50 size of 11.27 Mb, anchored onto thirteen pseudo-chromosomes. BUSCO analysis indicated a genome completeness of 96.20%. We annotated a total of 20,126 protein-coding genes and identified 18.80% repetitive elements within the genome. Phylogenetic analysis included nine other leech species, positioning H. bpling as a sister taxon to Hirudo manillensis. A comparative analysis focused on the identification of putative anticoagulant proteins (e.g. Hirudin, Antistasin, Hirustasin, Therostasin, Bdellastasin, Guamerin/Piguamerin, Gelin, Bplins, Saratin, Eglin C, Bdellin B-3, LDTI, Hyaluronidase, Destabilase, Apyrase, Leech carboxypeptidase inhibitor, Gamma-glutamyl transpeptidase, Lefaxin, Progranulin), identifying conserved regions and evolutionary relationships among these proteins across different leech species. As a medically significant species, H. bpling offers promising opportunities for research into anticoagulant therapies. This study provides a comprehensive genomic and phylogenetic analysis of H. bpling, offering new insights into leech genomics and the evolution of anticoagulant genes. The findings enhance our understanding of the genetic and evolutionary mechanisms underlying anticoagulant production in leeches.

摘要

本研究旨在获得并分析宽体金线蛭(Hirudinaria bpling)的染色体水平基因组组装,该物种对水生生态系统健康和医学研究至关重要。了解其基因组信息对于推进其医学应用和阐明其生态作用至关重要。我们使用PacBio HiFi长读长、Illumina测序和Hi-C染色体构象捕获技术相结合的方法组装了宽体金线蛭的基因组。这种方法使我们能够实现具有详细染色体组织的高分辨率基因组组装。宽体金线蛭的最终基因组组装大小为144.08 Mb,N50大小为11.27 Mb,锚定在13条假染色体上。BUSCO分析表明基因组完整性为96.20%。我们总共注释了20126个蛋白质编码基因,并在基因组中鉴定出18.80%的重复元件。系统发育分析包括其他9种水蛭物种,将宽体金线蛭定位为马尼拉蛭(Hirudo manillensis)的姐妹分类群。比较分析重点在于鉴定假定的抗凝血蛋白(如水蛭素、抗凝血酶、水蛭抑素、热丝氨酸蛋白酶抑制剂、蛭抑肽、胍氨酸/猪胍氨酸、凝胶蛋白、Bplins、沙瑞汀、埃格林C、蛭肽B-3、LDTI、透明质酸酶、去稳定酶、腺苷三磷酸双磷酸酶、水蛭羧肽酶抑制剂、γ-谷氨酰转肽酶、左法新、前颗粒蛋白),确定这些蛋白质在不同水蛭物种中的保守区域和进化关系。作为一种具有医学意义的物种,宽体金线蛭为抗凝血疗法的研究提供了有前景的机会。本研究提供了对宽体金线蛭的全面基因组和系统发育分析,为水蛭基因组学和抗凝血基因的进化提供了新的见解。这些发现增强了我们对水蛭抗凝血物质产生的遗传和进化机制的理解。

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