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首页> 外文期刊>Standards in Genomic Sciences >Genome sequence of Candidatus Arsenophonus lipopteni, the exclusive symbiont of a blood sucking fly Lipoptena cervi (Diptera: Hippoboscidae)
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Genome sequence of Candidatus Arsenophonus lipopteni, the exclusive symbiont of a blood sucking fly Lipoptena cervi (Diptera: Hippoboscidae)

机译：吸血蝇Lipoptena cervi（双翅目：Hippoboscidae）的独家共生菌Candidatus Arsenophonus lipopteni的基因组序列。

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摘要

Candidatus Arsenophonus lipopteni ( Enterobacteriaceae , Gammaproteobacteria ) is an obligate intracellular symbiont of the blood feeding deer ked, Lipoptena cervi (Diptera: Hippoboscidae). The bacteria reside in specialized cells derived from host gut epithelia (bacteriocytes) forming a compact symbiotic organ (bacteriome). Compared to the closely related complex symbiotic system in the sheep ked, involving four bacterial species, Lipoptena cervi appears to maintain its symbiosis exclusively with Ca. Arsenophonus lipopteni . The genome of 836,724?bp and 24.8?% GC content codes for 667 predicted functional genes and bears the common characteristics of sequence economization coupled with obligate host-dependent lifestyle, e.g. reduced number of RNA genes along with the rRNA operon split, and strongly reduced metabolic capacity. Particularly, biosynthetic capacity for B vitamins possibly supplementing the host diet is highly compromised in Ca. Arsenophonus lipopteni . The gene sets are complete only for riboflavin (B2), pyridoxine (B6) and biotin (B7) implying the content of some B vitamins, e.g. thiamin, in the deer blood might be sufficient for the insect metabolic needs. The phylogenetic position within the spectrum of known Arsenophonus genomes and fundamental genomic features of Ca. Arsenophonus lipopteni indicate the obligate character of this symbiosis and its independent origin within Hippoboscidae.
机译：s假丝酵母（Candidatus Arsenophonus lipopteni）（Enterobacteriaceae，Gammaproteobacteria）是献血鹿Lipoptena cervi（Diptera：Hippoboscidae）的专性细胞内共生体。细菌位于源自宿主肠上皮的特定细胞（细菌细胞）中，形成紧密的共生器官（细菌组）。与涉及四个细菌物种的绵羊科德密切相关的复杂共生系统相比，Lipoptena cervi似乎仅与Ca保持共生。鹅掌（Arsenophonus lipopteni）。 836,724？bp和24.8？％GC含量的基因组编码667个预测的功能基因，并具有序列节约的共同特征以及专心的宿主依赖性生活方式，例如减少了RNA基因的数目以及rRNA操纵子的分裂，并大大降低了代谢能力。特别地，在钙中大大损害了可能补充宿主饮食的B族维生素的生物合成能力。鹅掌（Arsenophonus lipopteni）。仅对核黄素（B2），吡ido醇（B6）和生物素（B7）具有完整的基因集，这暗示了某些B族维生素（例如维生素B）的含量。硫胺素在鹿血中可能足以满足昆虫的新陈代谢需求。已知Arsenophonus基因组谱内的系统发育位置和Ca的基本基因组特征。脂毛Arsenophonus lipopteni指出这种共生的专性特征及其在河马科内的独立起源。

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