کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2187842 1096141 2008 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Three-dimensional Structure of Genomic RNA in Bacteriophage MS2: Implications for Assembly
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیولوژی سلول
پیش نمایش صفحه اول مقاله
The Three-dimensional Structure of Genomic RNA in Bacteriophage MS2: Implications for Assembly
چکیده انگلیسی

Using cryo-electron microscopy, single particle image processing and three-dimensional reconstruction with icosahedral averaging, we have determined the three-dimensional solution structure of bacteriophage MS2 capsids reassembled from recombinant protein in the presence of short oligonucleotides. We have also significantly extended the resolution of the previously reported structure of the wild-type MS2 virion. The structures of recombinant MS2 capsids reveal clear density for bound RNA beneath the coat protein binding sites on the inner surface of the T = 3 MS2 capsid, and show that a short extension of the minimal assembly initiation sequence that promotes an increase in the efficiency of assembly, interacts with the protein capsid forming a network of bound RNA. The structure of the wild-type MS2 virion at ∼9 Å resolution reveals icosahedrally ordered density encompassing ∼90% of the single-stranded RNA genome. The genome in the wild-type virion is arranged as two concentric shells of density, connected along the 5-fold symmetry axes of the particle. This novel RNA fold provides new constraints for models of viral assembly.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Biology - Volume 375, Issue 3, 18 January 2008, Pages 824–836
نویسندگان
, , , , ,