一种从Marinobacter pelagius中分离出来的蛋白质性抗微生物化合物,对抗多药耐药沙门氏菌表现出对抗作用
Ishita Raninga1, Mohammadsakil Badi2, Debashis Banerjee3
1Department of Microbiology, Atmiya University, Kalawad Road, Rajkot, Gujarat, 360005, India.
Archives of microbiology
|December 15, 2025
概括
海洋细菌为新的抗菌药物提供了一个有希望的来源. 研究人员发现了一种来自Marinobacter pelagius的新型抗菌蛋白,可以有效地对抗耐药沙门氏菌paratyphi.
科学领域:
- 海洋微生物学 海洋微生物学
- 发现抗微生物药物发现.
- 蛋白质的生物化学 蛋白质的生物化学
背景情况:
- 抗菌素耐药性 (AMR) 是一个关键的全球健康威胁,需要新的治疗药物.
- 海洋生物多样性,特别是海洋细菌,为发现抗微生物化合物提供了一个尚未探索的储备.
- 迫切需要有效的治疗方法来对抗多药耐药 (MDR) 病原体,如沙门氏菌 (Salmonella paratyphi) 和菌 (Acinetobacter baumannii).
研究的目的:
- 从具有针对MDR病原体活动的海洋细菌中分离和鉴定抗菌蛋白质分离物.
- 探索印度古吉拉特邦纳拉拉海的海洋细菌的潜力,作为新型抗菌剂的来源.
- 为了识别和净化由有前途的海洋细菌分离物产生的特定抗菌化合物.
主要方法:
- 从印度古吉拉特州纳拉拉海收集和隔离海洋细菌.
- 查细菌分离物对MDR Salmonella paratyphi和Acinetobacter baumannii的对抗活性.
- 使用形态学,生化学和16S rRNA基因测序来识别活性分离物ISD30作为Marinobacter pelagius.
- 使用快速蛋白质液体染色学 (FPLC) 凝过方法净化生物活性化合物.
- 纯化蛋白质的表征,包括SDS-PAGE用于分子量估计 (~75kDa),MIC确定 (70μg/mL) 和热稳定性评估 (高达70°C).
主要成果:
- 获得了34种细菌分离物,其中分离物ISD30 (Marinobacter pelagius) 显示出显著的对抗活性.
- 从M. pelagius (ISD30) 净化了一种蛋白质化合物,该化合物对MDR Salmonella paratyphi.表现出强烈的活性.
- 纯化蛋白质的最小抑制度 (MIC) 为70μg/mL,温度稳定度高达70°C.
- 抗菌蛋白对S. paratyphi表现出活性,但对Acinetobacter baumannii没有活性.
结论:
- 这项研究报告了第一个从马里诺巴克特皮拉吉乌斯分离出来的抗菌蛋白,它对MDR病原体沙门氏菌有显著的抑制活性.
- 海洋马里诺细菌物种是新型抗菌剂的有希望的来源,用于打击MDR病原体.
- 描述的蛋白质的强度和稳定性表明它有可能作为治疗剂进一步发展.
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