Orthogonal ubiquitin transfer through engineered E1-E2 cascades for protein ubiquitination.

Orthogonal ubiquitin transfer through engineered E1-E2 cascades for protein ubiquitination.
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DOI:
10.1016/j.chembiol.2012.07.023
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发表时间:
2012-10-26
影响因子:
--
通讯作者:
Yin J
Yin J
中科院分区:
生物1区
文献类型:
--
作者:
Zhao B;Bhuripanyo K;Zhang K;Kiyokawa H;Schindelin H;Yin J

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泛素(UB)修饰的蛋白质控制着多种细胞过程。Ub通过E1-E2-E3酶的级联反应顺序转移到细胞蛋白上。人类基因组编码的2个E1s、50个E2s和数千个E3s的交叉活性使得在细胞中识别特定E3酶的底物蛋白变得困难。解决这个问题的一种方法是设计一个正交的UB转移(OUT)级联,其中工程UB(XUB)由工程的E1、E2和E3酶(XE1、XE2、XE3)传递,以修饰特定E3的底物蛋白。在这里,我们使用噬菌体展示和诱变来构建与天然的E1和E2酶正交的xUB-XE1和XE1-XE2对。我们设计UB转移级联的工作将使我们能够使用OUT来绘制由蛋白质泛素化介导的信号转导网络。
Protein modification by ubiquitin (UB) controls diverse cellular processes. UB is conjugated to cellular proteins by sequential transfer through an E1-E2-E3 enzymatic cascade. The cross-activities of 2 E1s, 50 E2s and thousands of E3s encoded by the human genome make it difficult to identify the substrate proteins of a specific E3 enzyme in the cell. One way to solve this problem is to engineer an orthogonal UB transfer (OUT) cascade in which the engineered UB (xUB) is relayed by engineered E1, E2 and E3 enzymes (xE1, xE2, xE3) to modify the substrate proteins of a specific E3. Here, we use phage display and mutagenesis to construct xUB-xE1 and xE1-xE2 pairs that are orthogonal to the native E1 and E2 enzymes. Our work on engineering the UB transfer cascades will enable us to use OUT to map the signal transduction networks mediated by protein ubiquitination.
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