کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5675147 1594217 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-step channel conformational changes common to DNA packaging motors of bacterial viruses T3, T4, SPP1, and Phi29
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ویروس شناسی
پیش نمایش صفحه اول مقاله
Three-step channel conformational changes common to DNA packaging motors of bacterial viruses T3, T4, SPP1, and Phi29
چکیده انگلیسی
The DNA packaging motor of dsDNA bacterial viruses contains a head-tail connector with a channel for the genome to enter during assembly and to exit during host infection. The DNA packaging motor of bacterial virus phi29 was recently reported to use the “One-way revolving” mechanism for DNA packaging. This raises a question of how dsDNA is ejected during infection if the channel acts as a one-way inward valve. Here we report a three step conformational change of the portal channel that is common among DNA translocation motors of bacterial viruses T3, T4, SPP1, and phi29. The channels of these motors exercise three discrete steps of gating, as revealed by electrophysiological assays. The data suggest that the three step channel conformational changes occur during DNA entry process, resulting in a structural transition in preparation for DNA movement in the reverse direction during ejection.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Virology - Volume 500, January 2017, Pages 285-291
نویسندگان
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