Rational inhibitor design for Pseudomonas aeruginosa salicylate adenylation enzyme PchD.

Rational inhibitor design for Pseudomonas aeruginosa salicylate adenylation enzyme PchD.
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DOI:
10.1007/s00775-022-01941-8
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发表时间:
2022-09
影响因子:
3
通讯作者:
Lamb, Audrey L.
Lamb, Audrey L.
中科院分区:
化学3区
文献类型:
--
作者:
Shelton, Catherine L.;Meneely, Kathleen M.;Ronnebaum, Trey A.;Chilton, Annemarie S.;Riley, Andrew P.;Prisinzano, Thomas E.;Lamb, Audrey L.

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铜绿假单胞菌是一种越来越耐药的病原体,可引起严重的肺部感染、烧伤伤口感染和糖尿病足感染。铜绿假单胞菌通过使用非核糖体肽合成酶(NRPS)生物合成途径产生铁载体绿脓菌螯铁蛋白。靶向铁载体NRPS蛋白的成员是目前正在研究的用于开发针对耐药性生物体的新抗生素的一种途径。在这里,报道了绿脓菌螯铁蛋白腺苷酸化结构域PchD的晶体结构。当与腺苷酸化抑制剂5′-O-(N-salicylsulfamoyl)adenosine(salicyl-AMS)共结晶时,该结构解析为2.11 μ m,而与设计用于靶向活性位点半胱氨酸的水杨基-AMS(4-cyano-salicyl-AMS)的修饰版本共结晶时,该结构解析为1.69 μ m。在结构中,PchD采用腺苷酸化构象,类似于来自鲍曼不动杆菌的AB 3403的报道。
Pseudomonas aeruginosa is an increasingly antibiotic-resistant pathogen that causes severe lung infections, burn wound infections, and diabetic foot infections. P. aeruginosa produces the siderophore pyochelin through the use of a non-ribosomal peptide synthetase (NRPS) biosynthetic pathway. Targeting members of siderophore NRPS proteins is one avenue currently under investigation for the development of new antibiotics against antibiotic-resistant organisms. Here, the crystal structure of the pyochelin adenylation domain PchD is reported. The structure was solved to 2.11 Å when co-crystallized with the adenylation inhibitor 5′-O-(N-salicylsulfamoyl)adenosine (salicyl-AMS) and to 1.69 Å with a modified version of salicyl-AMS designed to target an active site cysteine (4-cyano-salicyl-AMS). In the structures, PchD adopts the adenylation conformation, similar to that reported for AB3403 from Acinetobacter baumannii.
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