کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1358851 981370 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of allosamidin and demethylallosamidin photoaffinity probes and analysis of allosamidin-binding proteins in asthmatic mice
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Preparation of allosamidin and demethylallosamidin photoaffinity probes and analysis of allosamidin-binding proteins in asthmatic mice
چکیده انگلیسی

Allosamidins, metabolites of Streptomyces with strong inhibitory activities toward family 18 chitinases, show a variety of biological activities in various organisms. We prepared photoaffinity and biotinylated probes of allosamidin and demethylallosamidin, the N-demethyl derivative that shows much stronger anti-asthmatic activity than allosamidin. Mild acid hydrolysis of allosamidins afforded mono-amine derivatives, which were amidated to prepare probes with a photoactivatable aryl azide and/or biotin moieties. The derivatives with an N-acyl group at C-2 of the D-allosamine residue at the non-reducing end of allosamidins inhibited Trichoderma chitinase as strongly as the original compounds. Since the target of allosamidins in asthma is unclear, photoaffinity probes were used to analyze allosamidin-binding proteins in bronchoalveolar lavage (BAL) fluid in IL-13-induced asthmatic mice. Ym1, a chitinase-like protein, was identified as the main allosamidin-binding protein among proteins whose expression was upregulated by IL-13 in BAL fluid. Binding of allosamidins with Ym1 was confirmed by the experiments with photoaffinity probes and recombinant Ym1.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioorganic & Medicinal Chemistry - Volume 19, Issue 10, 15 May 2011, Pages 3054–3059
نویسندگان
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