کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
175756 458920 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis of di(glucosyloxo)phosphorus tetraphenylporphyrin complex with affinity to glucose-binding concanavalin A
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Synthesis of di(glucosyloxo)phosphorus tetraphenylporphyrin complex with affinity to glucose-binding concanavalin A
چکیده انگلیسی


• Phosphorus porphyrin complex containing axial glucosyl ligands was synthesized.
• The bio-affinity to lectin concanavalin A (ConA) was evaluated spectroscopically.
• The complex was site-specifically bound to the glucose-binding site of ConA.

A new di(glucopyranosyloxo)phosphorus tetraphenylporphyrin complex containing axial acetylated glucosyl ligands (1a) and its deacetylated derivative (1b) were synthesized. The bio-affinity of 1 to the lectin concanavalin A (ConA) was evaluated by various spectroscopic analyses. Both 1a and 1b were bound to ConA because the fluorescence of ConA arising from tryptophan and tyrosine residues was statically quenched by 1. Their absorption spectra also shifted to longer wavelengths upon ConA addition. These spectral changes provided binding constants of 4.5 × 104 and 6.4 × 104 M−1 for 1a and 1b, respectively. Moreover, ConA efficiently quenched the fluorescence of 1a but not that of 1b. This result demonstrated that 1b was site-specifically bound to a glucose binding site comprising the tyrosine residues, albeit far from tryptophan residues. On the other hand, 1a adsorbed less specifically on the entire ConA protein.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 120, September 2015, Pages 147–154
نویسندگان
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