PMID- 32322250 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 1664-302X (Print) IS - 1664-302X (Electronic) IS - 1664-302X (Linking) VI - 11 DP - 2020 TI - Occurrence and Diversity of CRISPR Loci in Lactobacillus casei Group. PG - 624 LID - 10.3389/fmicb.2020.00624 [doi] LID - 624 AB - Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) is an adaptive immune system that resists foreign genes through nuclease targeting in bacteria and archaea. In this study, we analyzed 68 strains of Lactobacillus casei group from the NCBI GenBank database, and bioinformatic tools were used to investigate the occurrence and diversity of CRISPR system. The results showed that a total of 30 CRISPR loci were identified from 27 strains. Apart from three strains which contained double loci with distinguishable distributed sites, most strains contained only one CRISPR locus. The analysis of direct repeat (DR) sequences showed that all DR could form stable RNA secondary structures. The CRISPR spacers showed diversity, and their origin and evolution were revealed through the investigation of their spacer sequences. In addition, a large number of CRISPR spacers showed perfect homologies to phage and plasmid sequences. Collectively, our results would contribute to researches of resistance in L. casei group, and also provide a new vision on the diversity and evolution of CRISPR/Cas system. CI - Copyright (c) 2020 Yang, Li, Ujiroghene, Yang, Lu, Zhang, Pang and Lv. FAU - Yang, Lan AU - Yang L AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Li, Weixun AU - Li W AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Ujiroghene, Obaroakpo Joy AU - Ujiroghene OJ AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Yang, Yang AU - Yang Y AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Lu, Jing AU - Lu J AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Zhang, Shuwen AU - Zhang S AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Pang, Xiaoyang AU - Pang X AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. FAU - Lv, Jiaping AU - Lv J AD - Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China. LA - eng PT - Journal Article DEP - 20200408 PL - Switzerland TA - Front Microbiol JT - Frontiers in microbiology JID - 101548977 PMC - PMC7156538 OTO - NOTNLM OT - CRISPR system OT - Lactobacillus casei group OT - genotyping OT - phage OT - spacer EDAT- 2020/04/24 06:00 MHDA- 2020/04/24 06:01 PMCR- 2020/04/08 CRDT- 2020/04/24 06:00 PHST- 2019/09/25 00:00 [received] PHST- 2020/03/19 00:00 [accepted] PHST- 2020/04/24 06:00 [entrez] PHST- 2020/04/24 06:00 [pubmed] PHST- 2020/04/24 06:01 [medline] PHST- 2020/04/08 00:00 [pmc-release] AID - 10.3389/fmicb.2020.00624 [doi] PST - epublish SO - Front Microbiol. 2020 Apr 8;11:624. doi: 10.3389/fmicb.2020.00624. eCollection 2020.