ジャーナル: Structure / 年: 2012 タイトル: DOLORS: versatile strategy for internal labeling and domain localization in electron microscopy. 著者: Pick-Wei Lau / Clinton S Potter / Bridget Carragher / Ian J MacRae / 要旨: Single-particle electron microscopy (EM) is a powerful tool for studying the structures of large biological molecules. However, the achievable resolution does not always allow for direct recognition ...Single-particle electron microscopy (EM) is a powerful tool for studying the structures of large biological molecules. However, the achievable resolution does not always allow for direct recognition of individual protein domains. Labels that can be visualized by EM have been developed for protein termini, but tagging internal domains remains a challenge. We describe a robust strategy for determining the position of internal sites within EM maps, termed domain localization by RCT sampling (DOLORS). DOLORS uses monovalent streptavidin added posttranslationally to tagged sites in the target protein. Internal labels generally display less conformational flexibility than terminal labels, providing more precise positional information. Automated methods are used to rapidly generate assemblies of unique 3D models allowing the attachment sites of labeled domains to be accurately identified and thus provide an overall architectural map of the molecule.
全体 : Dicer labeled with streptavidin at the loop following the DUF283 ...
全体
名称: Dicer labeled with streptavidin at the loop following the DUF283 domain
要素
試料: Dicer labeled with streptavidin at the loop following the DUF283 domain
タンパク質・ペプチド: Human Dicer
タンパク質・ペプチド: Streptavidin
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超分子 #1000: Dicer labeled with streptavidin at the loop following the DUF283 ...
超分子
名称: Dicer labeled with streptavidin at the loop following the DUF283 domain タイプ: sample / ID: 1000 / 詳細: The sample was mostly monodisperse / 集合状態: One human Dicer and one streptavidin molecule / Number unique components: 2