研究一种从墨西哥手工奶酪中分离出来的Enterococcus faecium菌株,全基因组测序,比较基因组学和细菌素表达的研究
Daniel Acero-Pimentel1, Diana I Romero-Sánchez1, Sac Nicté Fuentes-Curiel1
1Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, Mexico City, Mexico.
Antonie van Leeuwenhoek
|February 23, 2024
概括
这项研究对墨西哥奶酪中Enterococcus faecium QD-2的基因组进行了测序,揭示了奶酪相关和致病菌株之间的基因组差异. 鉴定出了新的细菌素,为微生物相互作用和抗生素耐药性提供了洞察力.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 食品科学 食品科学 食品科学
背景情况:
- 肠球菌是广泛存在的微生物,在各种环境中发现,包括发酵食品.
- 这些细菌在食品成熟中发挥作用,但也对抗生素耐药性的重要贡献者.
研究的目的:
- 为了进行整基因组测序和比较基因组学,从手工制作的墨西哥Cotija奶酪Enterococcus faecium菌株 (QD-2).
- 为了确定共生和致病性Enterococcus faecium菌株之间的基因组区别.
- 为了研究奶酪分离物中新型细菌素的产生.
主要方法:
- 整个基因组测序的测序
- 进行比较的基因组学.
- 用RT-qPCR进行细菌转录分析.
主要成果:
- 基因组分析显示,与致病菌株相比,碳水化合物代谢,抗生素耐药性 (包括万科米辛) 和菌体/CRISPR含量存在显著差异.
- 确定了两种以前未报告的细菌素,在E. faecium QD-2中作为二基斯特龙操作子共同转录.
- 这些新型细菌素的表达率是热素A的1.5倍.
结论:
- E. faecium QD-2 的基因组概况突出了与其食物环境相关的适应.
- 新型细菌素的发现为了解微生物竞争和潜在的抗微生物应用提供了新的途径.
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