Department of Biochemistry, Microbiology, and Bioinformatics, Research Unit in Bioinformatics (RUBi), Rhodes University, Makhanda, 6140, South Africa.
International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772-00100, Nairobi, Kenya.
BMC Genomics. 2024 Nov 22;25(1):1132. doi: 10.1186/s12864-024-11046-y.
The use of microsporidia as a disease-transmission-blocking tool has garnered significant attention. Microsporidia sp. MB, known for its ability to block malaria development in mosquitoes, is an optimal candidate for supplementing malaria vector control methods. This symbiont, found in Anopheles mosquitoes, can be transmitted both vertically and horizontally with minimal effects on its mosquito host. Its genome, recently sequenced from An. arabiensis, comprises a compact 5.9 Mbp.
Here, we analyze the Microsporidia sp. MB genome, highlighting its major genomic features, gene content, and protein function. The genome contains 2247 genes, predominantly encoding enzymes. Unlike other members of the Enterocytozoonida group, Microsporidia sp. MB has retained most of the genes in the glycolytic pathway. Genes involved in RNA interference (RNAi) were also identified, suggesting a mechanism for host immune suppression. Importantly, meiosis-related genes (MRG) were detected, indicating potential for sexual reproduction in this organism. Comparative analyses revealed similarities with its closest relative, Vittaforma corneae, despite key differences in host interactions.
This study provides an in-depth analysis of the newly sequenced Microsporidia sp. MB genome, uncovering its unique adaptations for intracellular parasitism, including retention of essential metabolic pathways and RNAi machinery. The identification of MRGs suggests the possibility of sexual reproduction, offering insights into the symbiont's evolutionary strategies. Establishing a reference genome for Microsporidia sp. MB sets the foundation for future studies on its role in malaria transmission dynamics and host-parasite interactions.
微孢子虫作为一种疾病传播阻断工具的应用引起了广泛关注。微孢子虫 sp. MB 因其能够阻断蚊子中的疟疾发展而成为补充疟疾媒介控制方法的理想候选者。这种共生体存在于按蚊中，可以垂直和水平传播，对其蚊子宿主的影响最小。其基因组最近从按蚊属中测序完成，大小为 5.9 Mbp。
在这里，我们分析了微孢子虫 sp. MB 的基因组，强调了其主要的基因组特征、基因内容和蛋白质功能。该基因组包含 2247 个基因，主要编码酶。与 Enterocytozoonida 组的其他成员不同，微孢子虫 sp. MB 保留了糖酵解途径中的大多数基因。还鉴定了参与 RNA 干扰 (RNAi) 的基因，表明存在宿主免疫抑制的机制。重要的是，检测到减数分裂相关基因 (MRG)，表明该生物具有有性生殖的潜力。比较分析显示，尽管宿主相互作用存在关键差异，但与最接近的亲缘种 Vittaforma corneae 具有相似性。
本研究对新测序的微孢子虫 sp. MB 基因组进行了深入分析，揭示了其适应细胞内寄生的独特适应性，包括保留必要的代谢途径和 RNAi 机制。MRGs 的鉴定表明有性繁殖的可能性，为共生体的进化策略提供了深入了解。为微孢子虫 sp. MB 建立参考基因组为研究其在疟疾传播动态和宿主-寄生虫相互作用中的作用奠定了基础。
