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Inhibitors of Gram-positive Cell Wall Synthesis01:23

Inhibitors of Gram-positive Cell Wall Synthesis

Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
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Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
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Related Experiment Video

Updated: Jun 1, 2026

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
07:47

Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases

Published on: January 1, 2016

Xyloccensin L.

Gang Feng, Jing Zhang, Jun Li

    Acta Crystallographica. Section E, Structure Reports Online
    |May 19, 2011
    PubMed
    Summary
    This summary is machine-generated.

    This study reports the first X-ray crystal structure of xyloccensin L, a unique limonoid. The research details its complex molecular structure and stabilization through intramolecular hydrogen bonding.

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    Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
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    Synthesis and Assay of Vibrio Quorum Sensing Inhibitors
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    Synthesis and Assay of Vibrio Quorum Sensing Inhibitors

    Published on: May 31, 2024

    Area of Science:

    • Natural Product Chemistry
    • Structural Chemistry
    • Crystallography

    Background:

    • Limonoids are a diverse class of terpenoids found in nature.
    • Structural elucidation of complex natural products is crucial for understanding their properties and potential applications.

    Purpose of the Study:

    • To determine the X-ray crystal structure of xyloccensin L.
    • To characterize the unique structural features of this limonoid, including its C1-C29 oxygen bridge.

    Main Methods:

    • X-ray crystallography was employed to determine the three-dimensional structure.
    • Analysis of bond lengths, bond angles, and conformations was performed.

    Main Results:

    • The first X-ray crystal structure of a limonoid with a C1-C29 oxygen bridge was successfully obtained.
    • Specific ring conformations were identified: boat for fused pyran and cyclohexane rings, half-chair for another cyclohexane and the d-lactone ring.
    • Intramolecular O-H⋯O hydrogen bonding was observed, contributing to molecular stability.

    Conclusions:

    • The study provides unprecedented structural insights into xyloccensin L.
    • The findings contribute to the understanding of limonoid structural diversity and chemical bonding.
    • The detailed structural information can serve as a basis for further research into the biological activity and synthesis of this compound.