在铜绿假单胞菌中,染色体编码的C类头孢菌素酶(AmpCβ-内酰胺酶)通常是导致对β-内酰胺抗生素的高水平耐药性。尽管已经对这些重要的β-内酰胺酶进行了多年的研究,但有关氨基酸序列如何决定AmpC假单胞菌衍生的头孢菌素酶(PDC)功能的知识仍然很少。对结构-功能关系的洞察力对于β-内酰胺和高亲和力抑制剂的设计至关重要。为了了解PDC如何识别β-内酰胺的C 3 / C 4羧酸盐,我们首先检查了铜绿假单胞菌的分子模型AmpCβ-内酰胺酶(PDC-3)与硼酸酯抑制剂配合使用,该硼酸酯抑制剂具有模仿噻唑烷/二氢噻嗪环的侧链和β-内酰胺底物的C 3 / C 4羧酸盐特征。我们接下来测试由我们的模型生成的假说,即,多于一个的氨基酸残基参与识别作为C 3 / C 4 β内酰胺羧酸酯,和工程化丙氨酸三个假定羧酸结合的氨基酸变体。抗菌药敏测试表明,尽管C 3 / C 4取代,PDC-3β-内酰胺酶仍保持较高的
[EN] BETA-LACTAMASE INHIBITORS<br/>[FR] INHIBITEURS DE BÊTA-LACTAMASES
申请人:PROTEZ PHARMACEUTICALS INC
公开号:WO2009064413A1
公开(公告)日:2009-05-22
Disclosed herein are alpha-aminoboronic acids and their derivatives which act as inhibitors of beta-lactamases. Also disclosed herein are pharmaceutical compositions comprising alpha-aminoboronic acids and methods of use thereof.
Exploring sequence requirements for C
<sub>3</sub>
/C
<sub>4</sub>
carboxylate recognition in the
<i>Pseudomonas aeruginosa</i>
cephalosporinase: Insights into plasticity of the AmpC β‐lactamase
作者:Sarah M. Drawz、Magdalena Taracila、Emilia Caselli、Fabio Prati、Robert A. Bonomo
DOI:10.1002/pro.612
日期:2011.6
(AmpC β‐lactamase) is often responsible for high‐level resistance to β‐lactam antibiotics. Despite years of study of these important β‐lactamases, knowledge regarding how amino acid sequence dictates function of the AmpC Pseudomonas‐derived cephalosporinase (PDC) remains scarce. Insights into structure‐function relationships are crucial to the design of both β‐lactams and high‐affinity inhibitors. In
在铜绿假单胞菌中,染色体编码的C类头孢菌素酶(AmpCβ-内酰胺酶)通常是导致对β-内酰胺抗生素的高水平耐药性。尽管已经对这些重要的β-内酰胺酶进行了多年的研究,但有关氨基酸序列如何决定AmpC假单胞菌衍生的头孢菌素酶(PDC)功能的知识仍然很少。对结构-功能关系的洞察力对于β-内酰胺和高亲和力抑制剂的设计至关重要。为了了解PDC如何识别β-内酰胺的C 3 / C 4羧酸盐,我们首先检查了铜绿假单胞菌的分子模型AmpCβ-内酰胺酶(PDC-3)与硼酸酯抑制剂配合使用,该硼酸酯抑制剂具有模仿噻唑烷/二氢噻嗪环的侧链和β-内酰胺底物的C 3 / C 4羧酸盐特征。我们接下来测试由我们的模型生成的假说,即,多于一个的氨基酸残基参与识别作为C 3 / C 4 β内酰胺羧酸酯,和工程化丙氨酸三个假定羧酸结合的氨基酸变体。抗菌药敏测试表明,尽管C 3 / C 4取代,PDC-3β-内酰胺酶仍保持较高的
Design and Exploration of Novel Boronic Acid Inhibitors Reveals Important Interactions with a Clavulanic Acid-Resistant Sulfhydryl-Variable (SHV) β-Lactamase
作者:Marisa L. Winkler、Elizabeth A. Rodkey、Magdalena A. Taracila、Sarah M. Drawz、Christopher R. Bethel、Krisztina M. Papp-Wallace、Kerri M. Smith、Yan Xu、Jeffrey R. Dwulit-Smith、Chiara Romagnoli、Emilia Caselli、Fabio Prati、Focco van den Akker、Robert A. Bonomo
DOI:10.1021/jm301490d
日期:2013.2.14
X-ray crystallography revealed two conformations of Arg-234 and Ser-130 in SHV K234R. The movement of Ser-130 is the principal cause of the observed clavulanate resistance. A panel of boronic acidinhibitors was designed and tested against SHV-1 and SHV K234R. A chiral ampicillin analogue was discovered to have a 2.4 ± 0.2 nM Ki for SHV K234R; the chiral ampicillin analogue formed a more complex hydrogen-bonding