کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9279453 1223677 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Visualization of discrete L1 oligomers in human papillomavirus 16 virus-like particles by gel electrophoresis with Coomassie staining
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی ویروس شناسی
پیش نمایش صفحه اول مقاله
Visualization of discrete L1 oligomers in human papillomavirus 16 virus-like particles by gel electrophoresis with Coomassie staining
چکیده انگلیسی
The recombinant major capsid protein (L1) of human papillomavirus (HPV) can self-assemble into virus-like particles (VLPs) with 360 L1 molecules per VLP. These tightly associated L1 oligomers in the assembled VLPs were disrupted in a pH-, denaturant-, time-, and temperature-dependent fashion. With non-reducing Laemmli-type SDS-PAGE, primarily the monomeric L1 protein (∼55 kDa) is observed when analyzing VLP preparations. When the pH was lowered to pH 7.0 in NuPAGE system and the gel temperature during electrophoresis was maintained at a lower temperature (∼7 °C), a ladder of protein bands in ∼55 kDa increments were detected above the monomeric p55 band. These discrete bands visualized as a ladder are likely the disulfide-linked L1 oligomers. In addition to the gel running conditions, an increase in pH, temperature, or SDS concentration during sample treatment was also shown to significantly reduce the amount of detectable oligomers, further corroborating the labile nature of these oligomers. Altogether, the results also implicate the redox-responsive nature of the HPV capsid comprising of >95% L1 protein. Molecular basis of the facile disulfide bond inter-change is discussed. This electrophoretic technique for trapping the disulfide-linked oligomers may be employed to detect the oligomeric status of other protein aggregates or assembled particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Virological Methods - Volume 127, Issue 2, August 2005, Pages 133-140
نویسندگان
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