کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1953468 1057278 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A 40.7 kDa Rpp30/Rpp1 homologue is a protein subunit of Dictyostelium discoideum RNase P holoenzyme
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
A 40.7 kDa Rpp30/Rpp1 homologue is a protein subunit of Dictyostelium discoideum RNase P holoenzyme
چکیده انگلیسی
RNase P is an essential and ubiquitous endonuclease that mediates the maturation of the 5′ ends of all precursor tRNA molecules. The holoenzyme from Dictyostelium discoideum possesses RNA and protein subunits essential for activity, but the exact composition of the ribonucleoprotein complex is still under investigation. Bioinformatic analysis of D. discoideum genome identified seven open reading frames encoding candidate RNase P protein subunits. The gene named drpp30 encodes a protein with a predicted molecular mass of 40.7 kDa that clusters with Rpp1 and Rpp30 RNase P protein subunits from Saccharomyces cerevisiae and human respectively, which have significantly lower molecular masses. Cloning and heterologous expression of DRpp30 followed by immunochemical analysis of RNase P active fractions demonstrates its association with RNase P holoenzyme. Furthermore, we show that DRpp30 can bind D. discoideum RNase P RNA and tRNA transcripts in vitro, giving a first insight of its possible role in D. discoideum RNase P function. Homology modeling using as a template the archaeal Ph1887p, and molecular dynamics simulations of the modeled structure suggest that DRpp30 adopts a TIM-barrel fold.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimie - Volume 89, Issue 3, March 2007, Pages 301-310
نویسندگان
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