کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1179398 962774 2006 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural characterization of an unusually stable cyclic peptide, kalata B2 from Oldenlandia affinis
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Structural characterization of an unusually stable cyclic peptide, kalata B2 from Oldenlandia affinis
چکیده انگلیسی

Kalata peptides are isolated from an African medicinal plant, Oldenlandia affinis, an aqueous decoction of which can be ingested to accelerate uterine contraction during childbirth. The closely packed disulfide core of kalata peptides confers unusual stability against thermal, chemical, and enzymatic degradation. The molecular arrangement may hamper NMR-assisted disulfide connectivity assignment. We have combined NMR with high-resolution mass spectrometry (MS) and MS/MS of native and chemically derivatized kalata B2 to determine its amino acid sequence and disulfide connectivity. Infrared multiphoton dissociation establishes the disulfide bond linkages in kalata B2 as I–IV, II–V and III–VI.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics - Volume 1764, Issue 10, October 2006, Pages 1568–1576
نویسندگان
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