کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2185738 1096005 2010 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Alternative Oligomeric States of the Yeast Rvb1/Rvb2 Complex Induced by Histidine Tags
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
Alternative Oligomeric States of the Yeast Rvb1/Rvb2 Complex Induced by Histidine Tags
چکیده انگلیسی

Rvb1 and Rvb2 are essential AAA+ (ATPases associated with diverse cellular activities) helicases, which are important components of critical complexes such as chromatin remodeling and telomerase complexes. The oligomeric state of the Rvb proteins has been controversial. Independent studies from several groups have described the yeast and human Rvb1/Rvb2 complex both as a single and as a double hexameric ring complex. We found that histidine-tagged constructs of yeast Rvb proteins employed in some of these studies induced the assembly of double hexameric ring Rvb1/Rvb2 complexes. Instead, untagged versions of these proteins assemble into single hexameric rings. Furthermore, purified endogenous untagged Rvb1/Rvb2 complexes from Saccharomyces cerevisiae were also found as single hexameric rings, similar to the complexes assembled in vitro from the purified untagged components. These results demonstrate that some of the differences between the reported structures are caused by histidine tags and imply that further studies on the purified proteins should be carried out using untagged constructs.

Graphical AbstractFigure optionsDownload high-quality image (118 K)Download as PowerPoint slideResearch Highlights
► Untagged yeast Rvb proteins assemble as single hexameric ring complexes.
► The presence of histidine tags in yeast Rvb proteins induces the assembly of dodecamers.
► Two stacked hexamers interacting via insertion domains to form dodecamers.
► Dodecamers revert into single hexameric rings upon the removal of the histidine tags.
► Purified endogenous untagged Rvb1/Rvb2 complexes are single hexameric rings.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Biology - Volume 404, Issue 3, 3 December 2010, Pages 478–492
نویسندگان
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