Proteasome Subunit Selective Activity-Based Probes Report on Proteasome Core Particle Composition in a Native Polyacrylamide Gel Electrophoresis Fluorescence-Resonance Energy Transfer Assay
作者:Gerjan de Bruin、Bo-Tao Xin、Bogdan I. Florea、Herman S. Overkleeft
DOI:10.1021/jacs.6b04207
日期:2016.8.10
Most mammalian tissues contain a single proteasome species: constitutive proteasomes. Tissues able to express, next to the constitutive proteasome catalytic activities (β1c, β2c, β5c), the three homologous activities, β1i, β2i and β5i, may contain numerous distinct proteasome particles: immunoproteasomes (composed of β1i, β2i and β5i) and mixed proteasomes containing a mix of these activities. This
大多数哺乳动物组织包含单一的蛋白酶体种类:组成型蛋白酶体。除了组成型蛋白酶体催化活性(β1c、β2c、β5c)之外,能够表达三种同源活性 β1i、β2i 和 β5i 的组织可能包含许多不同的蛋白酶体颗粒:免疫蛋白酶体(由 β1i、β2i 和 β5i 组成)和混合蛋白酶体蛋白酶体含有这些活性的混合物。这项工作描述了新的基于亚基选择性活性的探针的开发及其在基于活性的蛋白质分析测定中的使用,该测定允许检测各种蛋白酶体颗粒。组织提取物用带有不同荧光团和亚基特异性抑制剂的亚基特异性探针进行处理。样品通过天然聚丙烯酰胺凝胶电泳分离,