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2019 ; 10
(1
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Cell Membrane-Interrupting Antimicrobial Peptides from Isatis indigotica Fortune
Isolated by a Bacillus subtilis Expression System
#MMPMID31878275
Wu J
; Abbas HMK
; Li J
; Yuan Y
; Liu Y
; Wang G
; Dong AW
Biomolecules
2019[Dec]; 10
(1
): ä PMID31878275
show ga
The situation of drug resistance has become more complicated due to the scarcity
of plant resistance genes, and overcoming this challenge is imperative. Isatis
indigotica has been used for the treatment of wounds, viral infections, and
inflammation for centuries. Antimicrobial peptides (AMPs) are found in all
classes of life ranging from prokaryotes to eukaryotes. To identify AMPs, I.
indigotica was explored using a novel, sensitive, and high-throughput Bacillus
subtilis screening system. We found that IiR515 and IiR915 exhibited significant
antimicrobial activities against a variety of bacterial (Xanthomonas oryzae,
Ralstonia solanacearum, Clavibacter michiganensis, and C. fangii) and fungal
(Phytophthora capsici and Botrytis cinerea) pathogens. Scanning electron
microscope and cytometric analysis revealed the possible mechanism of these
peptides, which was to target and disrupt the bacterial cell membrane. This model
was also supported by membrane fluidity and electrical potential analyses.
Hemolytic activity assays revealed that these peptides may act as a potential
source for clinical medicine development. In conclusion, the plant-derived novel
AMPs IiR515 and IiR915 are effective biocontrol agents and can be used as raw
materials in the drug discovery field.