title: Antibacterial potential of hGlyrichin encoded by a human gene.
abstract: Emerging multidrug-resistant (MDR) bacteria are an enormous threat to human life because of their resistance to currently available antibiotics. The genes encoding antibacterial peptides have been studied extensively and are excellent candidates for a new generation of antibiotic drugs to fight MDR bacteria. In contrast to traditional antibiotics, antibacterial peptides, which do not cause drug resistance, have an unparalleled advantage. However, because most antibacterial peptides originate in species other than humans, the hetero-immunological rejection of antibacterial peptides is a key disadvantage that limits their clinical application. In this study, we identify hGlyrichin as a potential human antibacterial polypeptide. The hGlyrichin polypeptide kills a variety of bacteria including the MDR bacteria methicillin-resistant Staphylococcus aureus, MDR Pseudomonas aeruginosa, and MDR tubercle bacillus. A 19 amino acid peptide (pCM19) at positions 42-60 of hGlyrichin is crucial for its antibacterial activity. The hGlyrichin polypeptide kills bacteria through the destruction of the bacterial membrane. In addition, all peptides that are homologous to hGlyrichin have antibacterial activity and can penetrate the bacterial membrane. Importantly, hGlyrichin does not cause hemolytic side effects in vitro or in vivo. Therefore, based on the virtues of hGlyrichin, i.e., the absence of hetero-immunological rejection and hemolytic side effects and the unambiguous efficacy of killing pathogenic MDR bacteria, we propose hGlyrichin as a potential human antibacterial polypeptide.
authors.affiliation: School of Life Science & Technology, Xi'an Jiaotong University, Xi'an, China.
authors.forename: Jibin
authors.initials: J
authors.lastname: Sha
authors.forename: Guang
authors.initials: G
authors.lastname: Zhao
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Chen
authors.forename: Weiping
authors.initials: W
authors.lastname: Guan
authors.forename: Yanling
authors.initials: Y
authors.lastname: He
authors.forename: Zhaoqing
authors.initials: Z
authors.lastname: Wang
mesh_terms: D020816:Amino Acid Motifs; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002462:Cell Membrane / Q000187:drug effects; D057846:Cell-Penetrating Peptides / Q000494:pharmacology*; D024901:Drug Resistance, Multiple, Bacterial; D004926:Escherichia coli / Q000235:genetics / Q000254:growth & development / Q000648:ultrastructure; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D006461:Hemolysis / Q000187:drug effects; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics* / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D008826:Microbial Sensitivity Tests; D024101:Mitochondrial Proteins / Q000235:genetics* / Q000494:pharmacology; D010446:Peptide Fragments / Q000494:pharmacology*; D011994:Recombinant Proteins / Q000235:genetics / Q000494:pharmacology; D017386:Sequence Homology, Amino Acid
chemical_list: D000900:Anti-Bacterial Agents; D057846:Cell-Penetrating Peptides; D008565:Membrane Proteins; D024101:Mitochondrial Proteins; D010446:Peptide Fragments; C513338:ROMO1 protein, human; D011994:Recombinant Proteins