کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1390762 983137 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of a novel lipid A structure isolated from Azospirillum lipoferum lipopolysaccharide
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Characterization of a novel lipid A structure isolated from Azospirillum lipoferum lipopolysaccharide
چکیده انگلیسی

The structure of lipid A from Azospirillum lipoferum, a plant-growth-promoting rhizobacterium, was investigated. It was determined by chemical analysis, mass spectrometric methods, as well as 1D and 2D NMR spectroscopy. Because of the presence of substituents, the investigated lipid A differs from typical enterobacterial lipid A molecules. Its backbone is composed of a β-(1,6)-linked d-glucosamine disaccharide but lacks phosphate residues. Moreover, the reducing end of the backbone (position C-1) is substituted with α-linked d-galacturonic acid. 3-hydroxypalmitoyl residues are exclusively connected to amino groups of the glucosamine disaccharide. Hydroxyls at positions C-3 and C-3′ are esterified with 3-hydroxymyristic acids. Primary polar fatty acids are partially substituted by nonpolar fatty acids (namely, 18:0, 18:1 or 16:0), forming acyloxyacyl moieties.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 343, Issue 4, 17 March 2008, Pages 799–804
نویسندگان
, ,