1. Systematical Analysis of the Protein Targets of Lactoferricin B and Histatin-5 Using Yeast Proteome Microarrays
- Author
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Wei Sheng Wu, Chien Sheng Chen, and Pramod Shah
- Subjects
0301 basic medicine ,Histatin-5 ,Antifungal Agents ,Saccharomyces cerevisiae Proteins ,Microarray ,Antimicrobial peptides ,Protein Array Analysis ,synergy ,Synthetic lethality ,Histatins ,Saccharomyces cerevisiae ,Catalysis ,Article ,Inorganic Chemistry ,lcsh:Chemistry ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Drug Resistance, Fungal ,Lactoferricin B (Lfcin B) ,Gene expression ,Physical and Theoretical Chemistry ,Molecular Biology ,lcsh:QH301-705.5 ,Spectroscopy ,biology ,Chemistry ,Organic Chemistry ,antifungal activity ,General Medicine ,Yeast ,Computer Science Applications ,antimicrobial peptides (AMPs) ,Lactoferrin ,030104 developmental biology ,Histone ,Biochemistry ,lcsh:Biology (General) ,lcsh:QD1-999 ,030220 oncology & carcinogenesis ,Proteome ,biology.protein ,Trans-Activators ,proteome microarray ,DNA microarray ,Synthetic Lethal Mutations ,Protein Binding - Abstract
Antimicrobial peptides (AMPs) have potential antifungal activities, however, their intracellular protein targets are poorly reported. Proteome microarray is an effective tool with high-throughput and rapid platform that systematically identifies the protein targets. In this study, we have used yeast proteome microarrays for systematical identification of the yeast protein targets of Lactoferricin B (Lfcin B) and Histatin-5. A total of 140 and 137 protein targets were identified from the triplicate yeast proteome microarray assays for Lfcin B and Histatin-5, respectively. The Gene Ontology (GO) enrichment analysis showed that Lfcin B targeted more enrichment categories than Histatin-5 did in all GO biological processes, molecular functions, and cellular components. This might be one of the reasons that Lfcin B has a lower minimum inhibitory concentration (MIC) than Histatin-5. Moreover, pairwise essential proteins that have lethal effects on yeast were analyzed through synthetic lethality. A total of 11 synthetic lethal pairs were identified within the protein targets of Lfcin B. However, only three synthetic lethal pairs were identified within the protein targets of Histatin-5. The higher number of synthetic lethal pairs identified within the protein targets of Lfcin B might also be the reason for Lfcin B to have lower MIC than Histatin-5. Furthermore, two synthetic lethal pairs were identified between the unique protein targets of Lfcin B and Histatin-5. Both the identified synthetic lethal pairs proteins are part of the Spt-Ada-Gcn5 acetyltransferase (SAGA) protein complex that regulates gene expression via histone modification. Identification of synthetic lethal pairs between Lfcin B and Histatin-5 and their involvement in the same protein complex indicated synergistic combination between Lfcin B and Histatin-5. This hypothesis was experimentally confirmed by growth inhibition assay.
- Published
- 2019