Câmara Guilherme A, Nishiyama-Jr Milton Y, Kitano Eduardo S, Oliveira Ursula C, da Silva Pedro I, Junqueira-de-Azevedo Inácio L, Tashima Alexandre K
Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil.
Laboratório Especial de Toxinologia Aplicada, Center of Toxins, Immune-Response and Cell Signaling, Instituto Butantan, São Paulo, Brazil.
Front Pharmacol. 2020 Jul 17;11:1075. doi: 10.3389/fphar.2020.01075. eCollection 2020.
The order is considered one of the most successful groups among venomous animals in the world. An important factor for this success is the production of venoms, a refined biological fluid rich in proteins, short peptides and cysteine-rich peptides (CRPs). These toxins may present pharmacologically relevant biological actions, as antimicrobial, antiviral and anticancer activities, for instance. Therefore, there is an increasing interest in the exploration of venom toxins for therapeutic reasons, such as drug development. However, the process of peptide sequencing and mainly the evaluation of potential biological activities of these peptides are laborious, considering the low yield of venom extraction and the high variability of toxins present in spider venoms. Here we show a robust methodology for identification, sequencing, and initial screening of potential bioactive peptides found in the venom of . This methodology consists in a multiomics approach involving proteomics, peptidomics and transcriptomics analyses allied to predictions of antibacterial, antifungal, antiviral, and anticancer activities. Through the application of this strategy, a total of 92,889 venom gland transcripts were assembled and 84 novel toxins were identified at the protein level, including seven short peptides and 10 fully sequenced CRPs (belonging to seven toxin families). analysis suggests that seven CRPs families may have potential antimicrobial or antiviral activities, while two CRPs and four short peptides are potentially anticancer. Taken together, our results demonstrate an effective multiomics strategy for the discovery of new toxins and screening of potential bioactivities. This strategy may be useful in toxin discovery, as well as in the screening of possible activities for the vast diversity of molecules produced by venomous animals.
该目被认为是世界上最成功的有毒动物类群之一。这一成功的一个重要因素是毒液的产生,毒液是一种富含蛋白质、短肽和富含半胱氨酸肽(CRPs)的精细生物流体。例如,这些毒素可能具有药理学相关的生物活性,如抗菌、抗病毒和抗癌活性。因此,出于治疗原因(如药物开发),人们对探索毒液毒素的兴趣日益增加。然而,考虑到毒液提取产量低以及蜘蛛毒液中存在的毒素高度可变,肽测序过程以及主要是这些肽潜在生物活性的评估都很费力。在这里,我们展示了一种强大的方法,用于鉴定、测序和初步筛选在毒液中发现的潜在生物活性肽。这种方法包括一种多组学方法,涉及蛋白质组学、肽组学和转录组学分析,并结合抗菌、抗真菌、抗病毒和抗癌活性的预测。通过应用这种策略,总共组装了92889个毒腺转录本,并在蛋白质水平上鉴定了84种新毒素,包括7种短肽和10种完全测序的CRPs(属于7个毒素家族)。分析表明,7个CRPs家族可能具有潜在的抗菌或抗病毒活性,而2个CRPs和4种短肽具有潜在的抗癌活性。综上所述,我们的结果证明了一种有效的多组学策略,用于发现新毒素和筛选潜在生物活性。这种策略可能有助于毒素发现,以及筛选有毒动物产生的大量分子的可能活性。