Membrane protein / phosphoethanolamine transferase / lipid A modification / polymyxin resistance / TRANSFERASE
機能・相同性
機能・相同性情報
lipid A phosphoethanolamine transferase / phosphotransferase activity, phosphate group as acceptor / lipopolysaccharide core region biosynthetic process / response to antibiotic / metal ion binding / plasma membrane 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM132120
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI181556
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI74416
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI176776
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
AI150098
米国
引用
ジャーナル: Nat Commun / 年: 2025 タイトル: Mechanistic basis of antimicrobial resistance mediated by the phosphoethanolamine transferase MCR-1. 著者: Allen P Zinkle / Mariana Bunoro Batista / Carmen M Herrera / Satchal K Erramilli / Brian Kloss / Khuram U Ashraf / Kamil Nosol / Guozhi Zhang / Rosemary J Cater / Michael T Marty / Anthony A ...著者: Allen P Zinkle / Mariana Bunoro Batista / Carmen M Herrera / Satchal K Erramilli / Brian Kloss / Khuram U Ashraf / Kamil Nosol / Guozhi Zhang / Rosemary J Cater / Michael T Marty / Anthony A Kossiakoff / M Stephen Trent / Rie Nygaard / Phillip J Stansfeld / Filippo Mancia / 要旨: Polymyxins are used to treat infections caused by multidrug-resistant Gram-negative bacteria. They are cationic peptides that target the negatively charged lipid A component of lipopolysaccharides, ...Polymyxins are used to treat infections caused by multidrug-resistant Gram-negative bacteria. They are cationic peptides that target the negatively charged lipid A component of lipopolysaccharides, disrupting the outer membrane and lysing the cell. Polymyxin resistance is conferred by inner-membrane enzymes, such as phosphoethanolamine transferases, which add positively charged phosphoethanolamine to lipid A. Here, we present the structure of MCR-1, a plasmid-encoded phosphoethanolamine transferase, in its liganded form. The phosphatidylethanolamine donor substrate is bound near the active site in the periplasmic domain, and lipid A is bound over 20 Å away, within the transmembrane region. Integrating structural, biochemical, and drug-resistance data with computational analyses, we propose a two-state model in which the periplasmic domain rotates to bring the active site to lipid A, near the preferential phosphate modification site for MCR-1. This enzymatic mechanism may be generally applicable to other phosphoform transferases with large, globular soluble domains.