Metallo-β-lactamase : Structural basis for substrate-specificity and rational design of the inhibitors

金属-β-内酰胺酶:底物特异性的结构基础和抑制剂的合理设计

基本信息

  • 批准号:
    16390017
  • 负责人:
  • 金额:
    $ 9.09万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2004
  • 资助国家:
    日本
  • 起止时间:
    2004 至 2005
  • 项目状态:
    已结题

项目摘要

Metallo-β-lactamase (IMP-1) poses a potential threat for clinical environment because of wide spread substrate specificity and lack of the available inhibitors. IMP-1 requires two Zn(II) ions to hydrolyze β-lactam antibiotics.To study the effects on Zn(II) binding to IMP-1, we examined the kinetics of dissociation of Zn(II) from wild type IMP-1. From the kinetic experiments, the dissociation of Zn(II) ion from IMP-1 appeared to be two steps. Apo IMP-1 was prepared by the addition of EDTA directly to wild type IMP-1 at 30 ℃. Up to the addition of Co(II) to apo IMP-1 in 1:1, the absorption bands due to d-d transitions appeared. Further addition of Co(II) to apo IMP-1 up to 2:1 resulted in the increases in absorption at 344 nm, due to LMCT from thiolate of Cys221 to Co(II), and d-d transitions. These result suggest that the binding of Co(II) to apo IMP-1 proceeds stepwise : a Co(II) ion initially binds to the Zn1 site and then the second Co(II) ion binds to the Zn2 site.We prepared two inhibitors, pentafluorophenyl 3-mercaptopropionate (PFMP, 1) and 3-(3-mercaptopropionylsulfanyl)propionic acid pentafluorophenyl ester (MPAP, 2) for one of MBLs, IMP-1. From the gel-filtration experiment of the enzyme-inhibitor complex, these compounds inhibited IMP-1 irreversibly. Moreover, X-ray crystallography revealed that inhibitor 2 covalently binds to IMP-1 to form an amide bond between the amino group (N^ζ) of Lys224 and the inhibitor.
金属β-内酰胺酶(IMP-1)具有广泛的底物特异性,且缺乏有效的抑制剂,对临床环境构成潜在威胁。IMP-1需要两个Zn(II)离子来水解β-内酰胺抗生素,为了研究Zn(II)与IMP-1结合的影响,我们检测了Zn(II)从野生型IMP-1解离的动力学。动力学实验表明,IMP-1与Zn(II)离子的解离过程为两步。通过在30 ℃下向野生型IMP-1中直接加入EDTA制备Apo IMP-1。当Co(Ⅱ)与载脂蛋白IMP-1以1:1的比例加成时,出现了d-d跃迁吸收带。进一步添加Co(II)至apo IMP-1至2:1导致在344 nm处的吸收增加,这是由于从Cys 221的硫醇盐到Co(II)的LMCT和d-d跃迁。我们制备了两种抑制剂:3-巯基丙酸五氟苯基酯(PFMP,1)和3-(3-巯基丙酰硫烷基)丙酸五氟苯基酯(MPAP,2)。从凝胶过滤实验的酶抑制剂复合物,这些化合物抑制IMP-1不可逆。此外,X射线晶体学显示抑制剂2与IMP-1共价结合,在Lys 224的氨基(N^-)与抑制剂之间形成酰胺键。

项目成果

期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Probing the Role of Asp-120(81) of Metallo-β-lactamase (IMP-1) by Site-directed Mutagenesis, Kinetic Studies, and X-ray Crystallography*
  • DOI:
    10.1074/jbc.m414314200
  • 发表时间:
    2005-05
  • 期刊:
  • 影响因子:
    4.8
  • 作者:
    Y. Yamaguchi;Takahiro Kuroki;Hisami Yasuzawa;Toshihiro Higashi;Wanchun Jin;Akiko Kawanami;Y. Yamagata;Y. Arakawa;M. Goto;H. Kurosaki
  • 通讯作者:
    Y. Yamaguchi;Takahiro Kuroki;Hisami Yasuzawa;Toshihiro Higashi;Wanchun Jin;Akiko Kawanami;Y. Yamagata;Y. Arakawa;M. Goto;H. Kurosaki
Structure-based drug design of the irreversible inhibitors of metallo-β-lactamases
金属-β-内酰胺酶不可逆抑制剂的基于结构的药物设计
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yoshihara;T.;et. al.;Shin-ichi Ichiki et al.;Linyen Lin et al.;M.Iwamoto et al.;Yoshihiro Yamaguchi
  • 通讯作者:
    Yoshihiro Yamaguchi
β-ラクタム剤耐性菌が産生するメタロ-β-ラクタマーゼの三次元構造に立脚した非可逆的阻害剤の開発
基于β-内酰胺耐药菌产生的金属-β-内酰胺酶三维结构开发不可逆抑制剂
Irreversible inhibition of metallo-β-lactamase (IMP-1) by 3-(3-mercaptopropionylsulfanyl)propionic acid pentafluorophenyl ester
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YAMAGUCHI Yoshihiro其他文献

YAMAGUCHI Yoshihiro的其他文献

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{{ truncateString('YAMAGUCHI Yoshihiro', 18)}}的其他基金

Novel N-Containing pi-Conjugated Compounds: Synthesis, Physical Properties, and Functions
新型含氮π共轭化合物:合成、物理性质和功能
  • 批准号:
    23550062
  • 财政年份:
    2011
  • 资助金额:
    $ 9.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Creation of Novel Organic Fluorophores Containing Benzofuran Rings
含有苯并呋喃环的新型有机荧光团的创建
  • 批准号:
    16550131
  • 财政年份:
    2004
  • 资助金额:
    $ 9.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Synthesis, Properties and Function of Novel Nano-cyclynes, Nano-rods and Nano-tubes
新型纳米旋炔、纳米棒和纳米管的合成、性质和功能
  • 批准号:
    14540507
  • 财政年份:
    2002
  • 资助金额:
    $ 9.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Creation, Properties, and Chemical Behavior of Saturn-Type C_<60> Complexes.
土星型 C_<60> 配合物的形成、性质和化学行为。
  • 批准号:
    11640551
  • 财政年份:
    1999
  • 资助金额:
    $ 9.09万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

相似海外基金

Engineering Monobactam Biosynthesis towards the Generation of Novel β-Lactam Antibiotics
工程单菌素生物合成以产生新型β-内酰胺抗生素
  • 批准号:
    492438365
  • 财政年份:
    2021
  • 资助金额:
    $ 9.09万
  • 项目类别:
    WBP Fellowship
Investigating the role of the uncharacterized gene ygfB in the resistance of multidrug resistant Pseudomonas aeruginosa to β-lactam antibiotics
研究未表征基因 ygfB 在多重耐药铜绿假单胞菌对 β-内酰胺抗生素耐药性中的作用
  • 批准号:
    451686679
  • 财政年份:
  • 资助金额:
    $ 9.09万
  • 项目类别:
    Research Grants
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