Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Key Laboratory of Advanced Processing of Aquatic Products of Guangdong Higher Education Institution, College of Food Science and Technology, Guangdong Ocean University, No. 1 Haida Road, Zhanjiang, 524088, Guangdong Province, China.
Guangdong Institute of Special Equipment Inspection and Research Zhanjiang Branch, Zhanjiang, 524022, China.
Biochem Genet. 2020 Feb;58(1):1-15. doi: 10.1007/s10528-019-09927-z. Epub 2019 May 17.
The complete genome sequence of Bacillus velezensis type strain CMT-6 is presented for the first time. A comparative analysis between the genome sequences of CMT-6 with the genome of Bacillus amyloliquefaciens DSM7, B. velezensis FZB42, and Bacillus subtilis 168 revealed major differences in the lipopeptide synthesis genes. Of the above, only the CMT-6 strain possessed an integrated synthetase gene for synthesizing surfactin, iturin, and fengycin. However, CMT-6 shared 14, 12, and 10 other lipopeptide-producing genes with FZB42, DSM7, and 168 respectively. The largest numbers of non-synonymous mutations were detected in 205 gene sequences that produced these three lipopeptides in CMT-6 and 168. Comparing CMT-6 with DSM7, 58 non-synonymous mutations were detected in gene sequences that contributed to produce lipopeptides. In addition, InDels were identified in yczE and glnR genes. CMT-6 and FZB42 had the lowest number of non-synonymous mutations with 8 lipopeptide-related gene sequences. And InDels were identified in only yczE. The numbers of core genes, InDels, and non-synonymous mutations in genes were the main reasons for the differences in yield and variety of lipopeptides. These results will enrich the genomic resources available for B. velezensis and provide fundamental information to construct strains that can produce specific lipopeptides.
首次呈现芽孢杆菌韦氏亚种 CMT-6 全基因组序列。CMT-6 基因组序列与解淀粉芽孢杆菌 DSM7、芽孢杆菌韦氏亚种 FZB42 和枯草芽孢杆菌 168 基因组序列的比较分析表明,脂肽合成基因存在显著差异。在上述菌株中,只有 CMT-6 菌株拥有合成表面活性素、伊枯草菌素和丰原素的整合合成酶基因。然而,CMT-6 与 FZB42、DSM7 和 168 分别共享 14、12 和 10 个其他脂肽产生基因。在 CMT-6 和 168 中产生这三种脂肽的 205 个基因序列中检测到最大数量的非同义突变。与 DSM7 相比,在参与产生脂肽的基因序列中检测到 58 个非同义突变。此外,在 yczE 和 glnR 基因中发现了 InDels。CMT-6 和 FZB42 具有 8 个脂肽相关基因序列的最低数量的非同义突变,并且仅在 yczE 中发现了 InDels。核心基因、InDels 和基因中非同义突变的数量是脂肽产量和种类差异的主要原因。这些结果将丰富芽孢杆菌韦氏亚种的基因组资源,并为构建能够产生特定脂肽的菌株提供基础信息。