New 24-Membered Macrolactines from an Arctic Bacterium <i>Bacillus amyloliquefaciens</i> SCSIO 41392 and Their Anti-Pathogenicity Evaluation
Yue Song,
Yachun Zhou,
Mengjing Cong,
Shengyi Deng,
Yushi Chen,
Xiaoyan Pang,
Yonghong Liu,
Li Liao,
Liang Yang,
Junfeng Wang
Affiliations
Yue Song
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Yachun Zhou
Joint Laboratory of Guangdong-Hong Kong Universities for Vascular Homeostasis and Diseases, Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
Mengjing Cong
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Shengyi Deng
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Yushi Chen
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Xiaoyan Pang
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Yonghong Liu
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Li Liao
Key Laboratory for Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai 200136, China
Liang Yang
Joint Laboratory of Guangdong-Hong Kong Universities for Vascular Homeostasis and Diseases, Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
Junfeng Wang
CAS Key Laboratory of Tropical Marine Bio-Resources, Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Three new 24-membered macrolactines, amylomacrolactines A–C (1–3), along with two known compounds 4 and 5, were isolated from the Arctic bacteria Bacillus amyloliquefaciens SCSIO 41392. The configurations of 1–3 were assigned by a combination of coupling constants, NOESY, and analysis of MM2-optimized conformation, as well as by comparison with reports in the literature. Compounds 1 and 2 showed quorum sensing (QS) inhibitory activities against the Pseudomonas aeruginosa (P. aeruginosa) PQS system and suppressed PQS-regulated virulence factor pyocyanin synthesis. In addition, compounds 3–5 affected the production of another essential virulence factor, siderophore of pyoverdine (PVD), in P. aeruginosa. More importantly, compound 5 showed an anti-biofilm activity against P. aeruginosa. Altogether, the isolated compounds displayed multiple bacterial virulence inhibition activities, which is worthy of further exploration for novel analogues in antimicrobial drug development.
