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Venom Composition Does Not Vary Greatly Between Different Nematocyst Types Isolated from the Primary Tentacles of Olindias sambaquiensis (Cnidaria: Hydrozoa)
The Biological Bulletin ( IF 1.6 ) Pub Date : 2019-08-01 , DOI: 10.1086/705113
Liam B Doonan , Steven Lynham , Catherine Quinlan , Spike C Ibiji , Carlos E Winter , Gabriel Padilla , Adrian Jaimes-Becerra , André C Morandini , Antonio C Marques , Paul F Long

In this quantitative proteomics study we determined the variety and relative abundance of toxins present in enriched preparations of two nematocyst types isolated from the primary tentacles of the adult medusa stage of the hydrozoan Olindias sambaquiensis. The two nematocyst types were microbasic mastigophores and microbasic euryteles, and these were recovered from the macerated tentacle tissues by using a differential centrifugation approach. Soluble protein extracts from these nematocysts were tagged with tandem mass tag isobaric labels and putative toxins identified using tandem mass spectrometry coupled with a stringent bioinformatics annotation pipeline. Astonishingly, the venom composition of the two capsule types was nearly identical, and there was also little difference in the comparative abundance of toxins between the two nematocyst preparations. This homogeneity suggested that the same toxin complement was present regardless of the penetrative ability of the nematocyst type. Predicted toxin protein families that constituted the venom closely matched those of the toxic proteome of O. sambaquiensis published four years previously, suggesting that venom composition in this species changes little over time. Retaining an array of different nematocyst types to deliver a single venom, rather than sustaining the high metabolic cost necessary to maintain a dynamically evolving venom, may be more advantageous, given the vastly different interspecific interactions that adult medusa encounter in coastal zones.

中文翻译:

从 Olindias sambaquiensis (Cnidaria: Hydrozoa) 的初级触手分离的不同刺丝囊类型之间的毒液成分没有很大差异

在这项定量蛋白质组学研究中,我们确定了从水螅 Olindias sambaquiensis 的成体水母阶段的初级触须分离的两种刺丝囊类型的富集制剂中存在的毒素的种类和相对丰度。两种刺丝囊类型是微基性鞭毛细胞和微基性 euryteles,它们是通过使用差速离心法从浸渍的触手组织中回收的。来自这些刺丝囊的可溶性蛋白质提取物用串联质量标签同量异位标记和使用串联质谱结合严格的生物信息学注释管道鉴定的推定毒素进行标记。令人惊讶的是,两种胶囊类型的毒液成分几乎相同,两种刺丝囊制剂之间毒素的相对丰度也几乎没有差异。这种同质性表明,无论刺丝囊类型的穿透能力如何,都存在相同的毒素补体。构成毒液的预测毒素蛋白家族与四年前发表的 O. sambaquiensis 有毒蛋白质组的蛋白家族密切匹配,表明该物种的毒液成分随时间变化很小。考虑到成年美杜莎在沿海地区遇到的种间相互作用大不相同,保留一系列不同的刺丝囊类型以提供单一毒液,而不是维持维持动态演化毒液所需的高代谢成本,可能更有利。这种同质性表明,无论刺丝囊类型的穿透能力如何,都存在相同的毒素补体。构成毒液的预测毒素蛋白家族与四年前发表的 O. sambaquiensis 有毒蛋白质组的蛋白家族密切匹配,表明该物种的毒液成分随时间变化很小。考虑到成年美杜莎在沿海地区遇到的种间相互作用大不相同,保留一系列不同的刺丝囊类型以提供单一毒液,而不是维持维持动态演化毒液所需的高代谢成本,可能更有利。这种同质性表明,无论刺丝囊类型的穿透能力如何,都存在相同的毒素补体。构成毒液的预测毒素蛋白家族与四年前发表的 O. sambaquiensis 有毒蛋白质组的蛋白家族密切匹配,表明该物种的毒液成分随时间变化很小。考虑到成年美杜莎在沿海地区遇到的种间相互作用大不相同,保留一系列不同的刺丝囊类型以提供单一毒液,而不是维持维持动态演化毒液所需的高代谢成本,可能更有利。sambaquiensis 于四年前发表,表明该物种的毒液成分随时间变化很小。考虑到成年美杜莎在沿海地区遇到的种间相互作用大不相同,保留一系列不同的刺丝囊类型以提供单一毒液,而不是维持维持动态演化毒液所需的高代谢成本,可能更有利。sambaquiensis 于四年前发表,表明该物种的毒液成分随时间变化很小。考虑到成年美杜莎在沿海地区遇到的种间相互作用大不相同,保留一系列不同的刺丝囊类型以提供单一毒液,而不是维持维持动态演化毒液所需的高代谢成本,可能更有利。
更新日期:2019-08-01
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