克里斯普尔-卡斯系统的特征和向菌体在Lacticaseibacillus rhamnosus菌株的多样性
Bahman Panahi1, Behnaz Dehganzad2, Yousef Nami3
1Department of Genomics, Branch for Northwest and West Region, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Tabriz, Iran.
Frontiers in microbiology
|December 21, 2023
概括
这项研究的特点是,在Lacticaseibacillus rhamnosus.us中,集群定期间隔的短时间palindromic重复 (CRISPR) 和与CRISPR相关的 (CAS) 系统. 虽然II-A亚型系统的多样性有限,但它们有效地准了广泛的菌体,突出了它们在细菌适应性免疫中的作用.
科学领域:
- 微生物学 微生物学
- 细菌遗传学 细菌遗传学
- 免疫学 免疫学 免疫学
背景情况:
- 集群定期间隔的短平行列重复 (CRISPR) 和与CRISPR相关的 (CAS) 基因在细菌中形成了对细菌菌体的关键适应性免疫系统.
- 乳酸菌 (Lacticaseibacillus rhamnosus) 是一种具有潜在应用的重要细菌物种,因此了解其防御机制非常重要.
研究的目的:
- 在Lacticaseibacillus rhamnosus菌株中描述CRISPR-Cas系统的多样性,流行率和进化方面.
- 通过分析已识别的CRISPR数组内的间隔器序列同质性来研究菌体的范围.
主要方法:
- 完整的L. rhamnosus基因组序列的基因组挖掘.
- 对CRISPR-Cas系统亚型的识别和分类.
- 对菌体和菌体基因组进行CRISPR间距序列的同质分析.
主要成果:
- 在检查的L. rhamnosus菌株中,45% (106个菌株) 中发现了有效的CRISPR-Cas结构.
- 所有发现的CRISPR-Cas系统都属于II-A.A亚型.
- 具有II-A亚型系统的菌株证明了针对广泛的外来菌体的向.
结论:
- L. rhamnosus具有CRISPR-Cas亚型II-A系统,与其他乳酸菌相比具有显著的变异.
- 这些系统表现出自然活动,对于对L. rhamnosus.的菌体进行适应性免疫至关重要.
- 这些发现有助于理解细菌的防御机制和菌体与宿主之间的相互作用.
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