Genome of the invasive North American Haemaphysalis longicornis tick as a template for bovine anti-tick vaccine discovery.

IF 3.5 2区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Mohamed Abdallah Mohamed Moustafa, Miranda M Barnes, Nicole E Wagner, Deanna Bodine, Kylie Bendele, Pete D Teel, Perot Saelao, Dana C Price
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引用次数: 0

Abstract

Background: The ixodid tick Haemaphysalis longicornis Neumann, commonly referred to as the Asian longhorned tick, has expanded its range outside of East Asia into countries such as Australia, New Zealand, and the United States. Since the first U.S. detection in 2017, H. longicornis has spread to 21 states and the District of Columbia and has been implicated as a vector of various human and animal pathogens including Theileria orientalis Ikeda genotype, a causal agent of bovine theileriosis. Facilitated in part by the parthenogenetic nature of invasive populations, this tick has become a paramount threat to agricultural rangelands and U.S. livestock production. Reliance on traditional acaricides for vector control selects for resistant individuals, reducing the effectiveness of many chemical tools over time. Thus, focus has shifted to alternative control mechanisms including anti-tick vaccine development. To further such research, here we sequence and assemble a high-quality H. longicornis genome and robust gene catalog from invasive North American ticks while also providing an organ-specific transcriptomic expression catalog and in-depth informatic screening of the tick proteome for potential bovine antigenic molecules with potential utility as vaccine candidates.

Results: Using a combination of PacBio HiFi single-molecule sequencing and Hi-C chromosome conformation capture data, our genome assembly contains 270 scaffolds and spans a haploid genome size of 3.09 Gbp with an N50 of 213.4 Mbp. Gene prediction identified 21,947 high-confidence gene structures containing 96.2% of the core Arthropoda odb10 orthologs. Our organ-specific transcriptome library comprising salivary glands, midgut, ovaries, foreleg and hindleg additionally highlights potential anti-tick vaccine candidates and metabolic pathways to target for future in vitro trials.

Conclusions: Single-molecule sequencing of a triploid, parthenogenetic North American Haemaphysalis longicornis tick allowed for the generation of a highly contiguous genome assembly that, when coupled with extensive transcriptome profiling, resulted in a robust gene catalog containing multiple candidates for further study as anti-tick vaccine antigens.

入侵性北美长角血蜱的基因组作为开发牛抗蜱疫苗的模板。
背景:长角血蜱,通常被称为亚洲长角蜱,已将其活动范围扩大到东亚以外的国家,如澳大利亚、新西兰和美国。自2017年首次在美国发现以来,长角锥虫已传播到21个州和哥伦比亚特区,并被认为是各种人类和动物病原体的载体,包括东方希勒菌池田基因型,这是牛希勒菌病的病原体。由于入侵种群的孤雌生殖特性,这种蜱虫已经成为农业牧场和美国畜牧业生产的最大威胁。对传统杀螨剂进行病媒控制的依赖选择了具有抗药性的个体,随着时间的推移降低了许多化学工具的有效性。因此,重点已转移到其他控制机制,包括开发抗蜱虫疫苗。为了进一步开展这方面的研究,我们对高质量的长角蜱基因组和来自北美入侵蜱的强大基因目录进行了测序和组装,同时还提供了器官特异性转录组表达目录和蜱蛋白组的深入信息筛选,以寻找潜在的牛抗原分子,这些分子可能作为候选疫苗。结果:结合PacBio HiFi单分子测序和Hi-C染色体构象捕获数据,我们的基因组组装包含270个支架,跨越单倍体基因组大小为3.09 Gbp, N50为213.4 Mbp。基因预测鉴定出21947个高置信度的基因结构,其中包含96.2%的节肢动物odb10核心同源基因。我们的器官特异性转录组文库包括唾液腺、中肠、卵巢、前肢和后肢,此外还突出了潜在的抗蜱虫疫苗候选物和代谢途径,可用于未来的体外试验。结论:单分子测序的三倍体,孤雌繁殖的北美长角血蜱允许产生高度连续的基因组组装,当与广泛的转录组分析相结合时,产生一个强大的基因目录,其中包含多个候选抗蜱疫苗抗原的进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
BMC Genomics
BMC Genomics 生物-生物工程与应用微生物
CiteScore
7.40
自引率
4.50%
发文量
769
审稿时长
6.4 months
期刊介绍: BMC Genomics is an open access, peer-reviewed journal that considers articles on all aspects of genome-scale analysis, functional genomics, and proteomics. BMC Genomics is part of the BMC series which publishes subject-specific journals focused on the needs of individual research communities across all areas of biology and medicine. We offer an efficient, fair and friendly peer review service, and are committed to publishing all sound science, provided that there is some advance in knowledge presented by the work.
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