کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3418134 | 1225495 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A novel DEAD box helicase Has1p from Plasmodium falciparum: N-terminal is essential for activity
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
ایمنی شناسی و میکروب شناسی
انگل شناسی
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چکیده انگلیسی
Helicases catalyze the opening of nucleic acid duplexes and are implicated in many nucleic acid metabolic cellular processes that require single stranded DNA or reorganization of RNA structure. Previously we have reported that Plasmodium falciparum genome contains a number of DEAD box helicases. In the present study we report the cloning, expression and characterization of one of the novel members of DEAD box family from P. falciparum. Our results indicate that it is a homologue of Has1p from yeast and it contains DNA and RNA unwinding, nucleic acid-dependent ATPase and RNA binding activities. This enzyme can utilize all the nucleosidetriphosphates (NTPs) and deoxy nucleosidetriphosphates (dNTPs) for its unwinding activity. Using a truncated derivative of this protein we further report that the N-terminal region of the protein is essentially required for its activity. These studies suggest that besides the conserved helicase domain the highly variable N-terminal region also contributes in the activity of the protein.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Parasitology International - Volume 59, Issue 2, June 2010, Pages 271-277
Journal: Parasitology International - Volume 59, Issue 2, June 2010, Pages 271-277
نویسندگان
Krishna Prakash, Renu Tuteja,