| Project/Area Number |
23658101
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Bioproduction chemistry/Bioorganic chemistry
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
HAYASHI Hideo 大阪府立大学, 生命環境科学研究科, 教授 (30128772)
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| Co-Investigator(Kenkyū-buntansha) |
KAI Kenji 大阪府立大学, 生命環境科学研究科, 助教 (40508404)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 情報分子 / クオラムセンシング / アシルホモセリンラクトン / グラム陰性菌 |
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| Research Abstract |
Bacteria employ a mechanism of intercellular communication known as quorum sensing (QS) that regulate gene expression in a cell population-dependent manner. The most common QS signals in Gram-negative bacteria are N-acylhomoserine lactones (AHLs), which are synthesized from acyl-acyl carrier protein (acyl-ACP) and S-adenosylmethionine (SAM) in a reaction catalyzed by AHL synthase. Despite considerable interest in controlling bacterial QS, there is still no efficient inhibitor of the key enzyme. Here we report a new class of AHL synthase inhibitors that were designed based on the structure of N-acyl-SAM, a potent reaction intermediate of AHL synthase. The AHL synthase TofI from the plant pathogen Burkholderia glumae produces N-octanoylhomoserine lactone (C8-HSL) from octanoyl-ACP and SAM, which reaction was inhibited by the N-octanoyl-SAM analogs. Approach of simplification and optimization of the analogs structure led to compounds with high inhibitory activity. The present TofI inhibitors can be seed or lead compounds for the design of a new class of QS quenching agents.
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