Development of a high-throughput strategy for discovery of potent analogues of antibiotic lysocin E.

Abstract:

:Lysocin E, a 37-membered natural depsipeptide, induces rapid bacteriolysis in methicillin-resistant Staphylococcus aureus via a unique menaquinone-dependent mechanism, presenting a promising therapeutic lead. Despite the great medical importance, exploring the potential utility of its derivatives as new platform structures for antibiotic development has remained a significant challenge. Here, we report a high-throughput strategy that enabled the preparation of thousands of analogues of lysocin E and large-scale structure-activity relationship analyses. We integrate 26-step total synthesis of 2401 cyclic peptides, tandem mass spectrometry-sequencing, and two microscale activity assays to identify 23 candidate compounds. Re-synthesis of these candidates shows that 11 of them (A1-A11) exhibit antimicrobial activity superior or comparable to that of lysocin E, and that lysocin E and A1-A11 share L-Leu-6 and L-Ile-11. Therefore, the present strategy allows us to efficiently decipher biologically crucial residues and identify potentially useful agents for the treatment of infectious diseases.

journal_name

Nat Commun

journal_title

Nature communications

authors

Itoh H,Tokumoto K,Kaji T,Paudel A,Panthee S,Hamamoto H,Sekimizu K,Inoue M

doi

10.1038/s41467-019-10754-4

subject

Has Abstract

pub_date

2019-07-05 00:00:00

pages

2992

issue

1

issn

2041-1723

pii

10.1038/s41467-019-10754-4

journal_volume

10

pub_type

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