CORE--CHARACTERIZATION OF PROTEINS/RECOMBINANT PROTEINS

本核心项目将支持本计划项目的两个基本组成部分。第一个是通过基于Edman的化学测序和质谱技术表征新的或修饰的肽和蛋白质。第二个是表达和纯化项目所需的生物和生物化学研究的蛋白质。蛋白质表征是该计划的重要组成部分。核心提供了最先进的仪器和训练有素的调查人员和支持人员来进行这些表征。核心将表征项目研究人员正在研究的新型肽、蛋白质或已知蛋白质的翻译后修饰，特别是参与肌动蛋白和抑制素信号传导的介体。此外，我们将确认项目产生的用于生物学和结晶研究的重组蛋白的序列和翻译后修饰。有几个项目需要大量的蛋白质，如激活素、激活素突变体、受体的可溶性片段。核心将通过在合适的系统（例如杆状病毒/昆虫、哺乳动物或酵母细胞）中表达基因来产生这些蛋白质。将使用适当的鉴别分析技术对蛋白质进行纯化和表征。

Two essential components of the Projects of this Program will be supported by this Core. The first is the characterization of novel or modified peptides and proteins by Edman based chemical sequencing and mass spectrometric techniques. The second is the expression and purification of proteins that are required by the Projects for biological and biochemical investigations. Protein characterization is an essential part of this Program. The Core provides both state-of-the-art instrumentation and highly trained investigators and support personnel to carry out these characterizations. The Core will characterize novel peptides, proteins or post-translational modifications of known proteins being studied by Program investigators and in particular, mediators involved in actin and inhibin signaling. In addition, we will confirm the sequence and post-translational modifications of recombinant proteins that the Projects generate for use in biological and crystallization studies. Several projects require large quantities of proteins such as activin, activin mutants, inhibin, and soluble fragments of receptors. The Core will generate these proteins by expressing the genes in a suitable system (e.g. baculovirus/insect, mammalian, or yeast cells). The proteins will be purified and characterized using appropriate discriminatory analytical techniques.