کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7613211 1493587 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel strategy for the purification of a recombinant protein using ceramic fluorapatite-binding peptides as affinity tags
ترجمه فارسی عنوان
یک استراتژی جدید برای پاکسازی پروتئین نوترکیب با استفاده از پپتیدهای اتصال دهنده فلوراپاتیت سرامیک به عنوان برچسب های وابستگی
کلمات کلیدی
فلوئوراپاتیت سرامیک، سنتز پپتید، تگ های وابستگی پپتید، تولید و تصفیه پروتئین های نوترکیب، رفتار نگهداری، کروماتوگرافی وابستگی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
In recent years, affinity fusion-tag systems have become a popular technique for the purification of recombinant proteins from crude extracts. However, several drawbacks including the high expense and low stability of ligands, their leakage during operation, and difficulties in immobilization, make it important to further develop the method. The present work is concerned with the utilization of a ceramic fluorapatite (CFT)-based chromatographic matrix to overcome these drawbacks. A heptapeptide library exhibiting a range of properties have been synthesized and subjected to ceramic fluorapatite (CFT) chromatography to characterize their retention behavior as a function of pH and composition of the binding buffer. The specific binding and elution behavior demonstrates the possible application of CFT-binding peptides as tags for enhancing the selective recovery of proteins by CFT chromatography. To materialize this strategy, a phage-derived CFT-specific sequence KPRSVSG (Tag1) with/without a consecutive hexalysine sequence, KKKKKKKPRSVSG (Tag2), were fused at the C-terminus of an enhanced green fluorescent protein (eGFP). The resulting gene constructs H-eGFP, H-eGFP-Tag1 and H-eGFP-Tag2 were expressed in Escherichia coli strain BL-21, and the clarified cell lysate was applied to the CFT column equilibrated with binding buffer (20-50 mM sodium phosphate, pH 6-8.4). Sodium phosphate (500 mM) or 1 M NaCl in the respective binding buffer was used to elute the fused proteins, and the chromatographic fractions were analyzed by gel electrophoresis. Both the yield and purity were over 90%, demonstrating the potential application of the present strategy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1339, 25 April 2014, Pages 26-33
نویسندگان
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