Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4

Salvicin K (Sal K) and antimicrobial peptide-like bacteriocin b (Alb b) peptides produced by Lactobacillus salivarius K4 have been reported as bacteriocins from lactic acid bacteria (LAB). Here, we aimed to characterize their activity against gram-positive bacteria, Streptococcus sp. TISTR 1030 and...

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Main Authors: Kannika Thongkhao, Frank D. Snnichsen, Sunee Nitisinprasert, Kiattawee Choowongkomon
Format: บทความวารสาร
Language:English
Published: Science Faculty of Chiang Mai University 2019
Online Access:http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8955
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64068
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spelling th-cmuir.6653943832-640682019-05-07T09:59:45Z Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4 Kannika Thongkhao Frank D. Snnichsen Sunee Nitisinprasert Kiattawee Choowongkomon Salvicin K (Sal K) and antimicrobial peptide-like bacteriocin b (Alb b) peptides produced by Lactobacillus salivarius K4 have been reported as bacteriocins from lactic acid bacteria (LAB). Here, we aimed to characterize their activity against gram-positive bacteria, Streptococcus sp. TISTR 1030 and Staphylococcus aureus TISTR 118. The antimicrobial activity increased when Sal K and Alb b peptides were combined (MIC 3.59 mM). Results from scanning electron microscope (SEM) and transmission electron microscope (TEM) showed that the bacterial cell surface altered dramatically in the presence of the Sal K and Alb b mixture. The peptide mixture affected the bacterial membrane potential and caused cell cytotoxicity leading to the leakage of DNA and b-galactosidase. Secondary structure characterization of the peptide mixtures revealed increasing helical structure in the membrane mimicking environment. From our experiments, it can be concluded that a synergistic effect is obtained when both peptides are combined presumably through the formation of a complex. Combination of peptide exhibits more active against gram-positive bacteria than each individual peptide component. 2019-05-07T09:59:45Z 2019-05-07T09:59:45Z 2018 บทความวารสาร 0125-2526 http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8955 http://cmuir.cmu.ac.th/jspui/handle/6653943832/64068 Eng Science Faculty of Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Salvicin K (Sal K) and antimicrobial peptide-like bacteriocin b (Alb b) peptides produced by Lactobacillus salivarius K4 have been reported as bacteriocins from lactic acid bacteria (LAB). Here, we aimed to characterize their activity against gram-positive bacteria, Streptococcus sp. TISTR 1030 and Staphylococcus aureus TISTR 118. The antimicrobial activity increased when Sal K and Alb b peptides were combined (MIC 3.59 mM). Results from scanning electron microscope (SEM) and transmission electron microscope (TEM) showed that the bacterial cell surface altered dramatically in the presence of the Sal K and Alb b mixture. The peptide mixture affected the bacterial membrane potential and caused cell cytotoxicity leading to the leakage of DNA and b-galactosidase. Secondary structure characterization of the peptide mixtures revealed increasing helical structure in the membrane mimicking environment. From our experiments, it can be concluded that a synergistic effect is obtained when both peptides are combined presumably through the formation of a complex. Combination of peptide exhibits more active against gram-positive bacteria than each individual peptide component.
format บทความวารสาร
author Kannika Thongkhao
Frank D. Snnichsen
Sunee Nitisinprasert
Kiattawee Choowongkomon
spellingShingle Kannika Thongkhao
Frank D. Snnichsen
Sunee Nitisinprasert
Kiattawee Choowongkomon
Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
author_facet Kannika Thongkhao
Frank D. Snnichsen
Sunee Nitisinprasert
Kiattawee Choowongkomon
author_sort Kannika Thongkhao
title Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
title_short Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
title_full Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
title_fullStr Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
title_full_unstemmed Structural Characterization and Mode of Action Studies on Salvicin K and Antimicrobial Peptide-like Bacteriocin b Peptide Isolated from Lactobacillus salivarius K4
title_sort structural characterization and mode of action studies on salvicin k and antimicrobial peptide-like bacteriocin b peptide isolated from lactobacillus salivarius k4
publisher Science Faculty of Chiang Mai University
publishDate 2019
url http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=8955
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64068
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