Volume 129, Issue 10 pp. 2788-2792
Zuschrift

Chemical Synthesis of Diubiquitin-Based Photoaffinity Probes for Selectively Profiling Ubiquitin-Binding Proteins

Jun Liang

Jun Liang

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and University of Science and Technology of China, Hefei, 230026 China

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Lin Zhang

Lin Zhang

MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084 China

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Xiang-Long Tan

Xiang-Long Tan

Department of Chemistry, Tsinghua University, Beijing, 100084 China

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Yun-Kun Qi

Yun-Kun Qi

Department of Chemistry, Tsinghua University, Beijing, 100084 China

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Shan Feng

Shan Feng

MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084 China

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Prof. Haiteng Deng

Prof. Haiteng Deng

MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084 China

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Prof. Yijing Yan

Prof. Yijing Yan

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and University of Science and Technology of China, Hefei, 230026 China

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Prof. Ji-Shen Zheng

Prof. Ji-Shen Zheng

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and University of Science and Technology of China, Hefei, 230026 China

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Prof. Lei Liu

Prof. Lei Liu

Department of Chemistry, Tsinghua University, Beijing, 100084 China

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Prof. Chang-Lin Tian

Corresponding Author

Prof. Chang-Lin Tian

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and University of Science and Technology of China, Hefei, 230026 China

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First published: 01 February 2017
Citations: 11

Abstract

Biochemical studies of cellular processes involving polyubiquitin have gained increasing attention. More tools are needed to identify ubiquitin (Ub)-binding proteins. We report diazirine-based photoaffinity probes that can capture Ub-binding proteins in cell lysates, and show that diazirines are preferable to aryl azides as the photo-crosslinking group, since they decrease non-selective capture. Photoaffinity probes containing at least two Ub units were required to effectively capture Ub-binding proteins. Different capture selectivity was observed for probes containing diubiquitin moieties with different types of linkages, thus indicating the potential to develop linkage-dependent probes for selectively profiling Ub-binding proteins under various cellular conditions.

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