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Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio

The emergence of multidrug-resistant (MDR) microbes caused by overuse of antibiotics leads to urgent demands for novel antibiotics exploration. Our recent data showed that Ly2.1–3 (a novel lymphocyte antigen 6 (Ly6) gene cluster) were proteins with cationic nature and rich in cysteine content, that...

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Detalles Bibliográficos
Autores principales: Liu, Xuemin, Cao, Xuwen, Wang, Su, Ji, Guangdong, Zhang, Shicui, Li, Hongyan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Portland Press Ltd. 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5240587/
https://www.ncbi.nlm.nih.gov/pubmed/27980020
http://dx.doi.org/10.1042/BSR20160265
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author Liu, Xuemin
Cao, Xuwen
Wang, Su
Ji, Guangdong
Zhang, Shicui
Li, Hongyan
author_facet Liu, Xuemin
Cao, Xuwen
Wang, Su
Ji, Guangdong
Zhang, Shicui
Li, Hongyan
author_sort Liu, Xuemin
collection PubMed
description The emergence of multidrug-resistant (MDR) microbes caused by overuse of antibiotics leads to urgent demands for novel antibiotics exploration. Our recent data showed that Ly2.1–3 (a novel lymphocyte antigen 6 (Ly6) gene cluster) were proteins with cationic nature and rich in cysteine content, that are characteristic of antimicrobial peptides (AMPs) and their expression were all significantly up-regulated after challenge with lipopolysaccharide (LPS). These strongly suggested that Ly2.1–3 are potential AMPs, but firm evidence are lacking. Here, we clearly showed that the recombinant proteins of Ly2.1–3 were capable of killing Gram-negative bacteria Aeromonas hydrophila and Escherichia coli, while they had little bactericidal activity against the Gram-positive bacteria Staphylococcus aureus and Bacillus subtilis. We also showed that recombinant proteins Ly2.1–3 (rLy2.1–3) were able to bind to the Gram-negative bacteria A. hydrophila, E. coli and the microbial signature molecule LPS, but not to the Gram-positive bacteria S. aureus and B. subtilis as well as the microbial signature molecule LTA. Moreover, the Scatchard analysis revealed that rLy2.1–3 could specifically bind to LPS. Finally, we found that Ly2.1–3 were not cytotoxic to mammalian cells. All these together indicate that Ly2.1–3 can function as AMPs.
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spelling pubmed-52405872017-02-28 Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio Liu, Xuemin Cao, Xuwen Wang, Su Ji, Guangdong Zhang, Shicui Li, Hongyan Biosci Rep Research Articles The emergence of multidrug-resistant (MDR) microbes caused by overuse of antibiotics leads to urgent demands for novel antibiotics exploration. Our recent data showed that Ly2.1–3 (a novel lymphocyte antigen 6 (Ly6) gene cluster) were proteins with cationic nature and rich in cysteine content, that are characteristic of antimicrobial peptides (AMPs) and their expression were all significantly up-regulated after challenge with lipopolysaccharide (LPS). These strongly suggested that Ly2.1–3 are potential AMPs, but firm evidence are lacking. Here, we clearly showed that the recombinant proteins of Ly2.1–3 were capable of killing Gram-negative bacteria Aeromonas hydrophila and Escherichia coli, while they had little bactericidal activity against the Gram-positive bacteria Staphylococcus aureus and Bacillus subtilis. We also showed that recombinant proteins Ly2.1–3 (rLy2.1–3) were able to bind to the Gram-negative bacteria A. hydrophila, E. coli and the microbial signature molecule LPS, but not to the Gram-positive bacteria S. aureus and B. subtilis as well as the microbial signature molecule LTA. Moreover, the Scatchard analysis revealed that rLy2.1–3 could specifically bind to LPS. Finally, we found that Ly2.1–3 were not cytotoxic to mammalian cells. All these together indicate that Ly2.1–3 can function as AMPs. Portland Press Ltd. 2017-01-17 /pmc/articles/PMC5240587/ /pubmed/27980020 http://dx.doi.org/10.1042/BSR20160265 Text en © 2017 The Author(s) http://creativecommons.org/licenses/by/4.0/This is an open access article published by Portland Press Limited on behalf of the Biochemical Society and distributed under the Creative Commons Attribution License 4.0 (CC BY) (http://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Articles
Liu, Xuemin
Cao, Xuwen
Wang, Su
Ji, Guangdong
Zhang, Shicui
Li, Hongyan
Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title_full Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title_fullStr Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title_full_unstemmed Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title_short Identification of Ly2 members as antimicrobial peptides from zebrafish Danio rerio
title_sort identification of ly2 members as antimicrobial peptides from zebrafish danio rerio
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5240587/
https://www.ncbi.nlm.nih.gov/pubmed/27980020
http://dx.doi.org/10.1042/BSR20160265
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