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Putative Probiotic Ligilactobacillus salivarius Strains Isolated from the Intestines of Meat-Type Pigeon Squabs

文献类型： 外文期刊

作者： Tian, Shaoqi 1 ; Jiang, Yinhong 1 ; Han, Qiannan 1 ; Meng, Chuang 1 ; Ji, Feng 3 ; Zhou, Bin 4 ; Ye, Manhong 1 ;

作者机构： 1.Yangzhou Univ, Coll Biosci & Biotechnol, Yangzhou 225009, Peoples R China

2.Yangzhou Univ, Jiangsu Key Lab Zoonosis, Yangzhou 225009, Peoples R China

3.Inst Anim Husb & Vet Med, Beijing Acad Agr & Forestry Sci, Beijing 100089, Peoples R China

4.Yangzhou Univ, Coll Anim Sci & Technol, Yangzhou 225009, Peoples R China

关键词： Pigeon; Probiotic; Lactic acid bacteria; Whole genome analysis; Molecular docking analysis

期刊名称：PROBIOTICS AND ANTIMICROBIAL PROTEINS （ 影响因子：4.4； 五年影响因子：5.0 ）

ISSN： 1867-1306

年卷期： 2024 年

页码：

收录情况： SCI

摘要： This study aims to screen for potential probiotic lactic acid bacteria from the intestines of meat-type pigeon squabs. Ligilactobacillus salivarius YZU37 was identified as the best comprehensive performed strain. Being acid- and bile salt-tolerant, it displayed growth-inhibition activities against Staphylococcus aureus ATCC25923, Escherichia coli ATCC25922, and Salmonella typhimurium SL1344, exhibited sensitivity to 6 commonly used antibiotics, and endowed with good cell surface hydrophobicity, auto-aggregation property, and anti-oxidant activities. Results of in vitro experiments indicated that the bacteriostatic effects of this strain were related to the production of proteinaceous substances that depend on acidic conditions. Whole-genome sequencing of L. salivarius YZU37 was performed to elucidate the genetic basis underlying its probiotic potential. Pangenome analysis of L. salivarius YZU37 and other 212 L. salivarius strains available on NCBI database revealed a pigeon-unique gene coding choloylglycine hydrolase (CGH), which had higher enzyme-substrate binding affinity than that of the common CGH shared by L. salivarius strains of other sources. Annotation of the functional genes in the genome of L. salivarius YZU37 revealed genes involved in responses to acid, bile salt, heat, cold, heavy metal, and oxidative stresses. The whole genome analysis also revealed the absence of virulence and toxin genes and the presence of 65 genes distributed under 4 CAZymes classes, 2 CRISPR-cas regions, and 3 enterolysin A clusters which may confer the acid-dependent antimicrobial potential of L. salivarius YZU37. Altogether, our results highlighted the probiotic potential of L. salivarius YZU37. Further in vivo investigations are required to elucidate its beneficial effects on pigeons.

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