کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
22644 43368 2016 4 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Stable and enhanced gene expression in Clostridium acetobutylicum using synthetic untranslated regions with a stem-loop
ترجمه فارسی عنوان
بیان ژن پایدار و افزایش یافته در Clostridium acetobutylicum با استفاده از مناطق مصنوعی غیر ترجمه شده با حلقه ساقه
کلمات کلیدی
Clostridium acetobutylicum؛ بیان بیش از حد ژن؛ منطقه غیر ترجمه 5
Clostridium acetobutylicum; Gene overexpression; 5′ untranslated region
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• Short single-stranded UTR decreased gene expression in Clostridium acetobutylicum.
• Addition of a stem-loop at the 5′ end of mRNA increased mRNA level.
• Addition of a stem-loop at the 5′ end of mRNA increased protein expression level.

Gene overexpression is one of the most basic strategies in metabolic engineering, but the factors determining gene expression levels have been poorly studied in Clostridium species. In this study, we found that a short single-stranded 5′ untranslated region (UTR) sequence led to decreased gene expression in Clostridium acetobutylicum. Using an in vitro enzyme assay and reverse transcription-quantitative PCR, we found that addition of a small stem-loop at the 5′ end of mRNA increased mRNA levels and thereby protein expression levels up to 4.6-fold, possibly protecting mRNA from exonuclease attack. Gene-expression levels were apparently independent of the stability of the added stem-loop; the existence of a stem-loop itself appears to be more important. Our results indicate that efficient expression cassettes can be designed by taking the 5′ UTR into consideration, as the expression levels can vary even though the same promoter and RBS are used. These findings will be useful for developing a more reliable gene expression system for metabolic engineering of Clostridium strains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biotechnology - Volume 230, 20 July 2016, Pages 40–43
نویسندگان
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