Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (11): 20240091.doi: 10.7503/cjcu20240091

• Article • Previous Articles     Next Articles

A New Method for Large-scale Enrichment and Stepwise Identification of RNA-protein Complexes

DONG Peiying1, LIU Tong2(), QIN Weijie1,2()   

  1. 1.School of Basic Medical Science,Anhui Medical University,Hefei 230032,China
    2.State Key Laboratory of Medical Proteomics,Beijing Proteome Research Center,National Center for Protein Sciences(Beijing),Beijing Institute of Lifeomics,Beijing 102206,China
  • Received:2024-02-23 Online:2024-11-10 Published:2024-03-16
  • Contact: QIN Weijie E-mail:liutong19920918@163.com;aunp_dna@126.com
  • Supported by:
    the National Key Research and Development Program of China(2021YFA1302604)

Abstract:

RNA-protein complexes(RPC) regulate various physiological processes in organisms and play a crucial role in the synthesis and degradation of RNA. For deep RPC profiling in addition to develop RNA-binding proteins(RBP) enrichment methods, some researchers also turned their attention to RNA-associated proteins(RAP), which interact with RBP via protein-protein interaction. However, previous methods often enrich all proteins in the RPC as a whole and cannot differentiate RBP from RAP. Therefore, we reported a new method using combination of 254 nm UV crosslinking of RBP and RNA and DSP crosslinking of RBP and RAP. Next, RBP and RAP can be eluted in a stepwise way and separately identified by mass spectrometry. A total of 2007 high confidence RBP and 927 high confidence RAP were identified in HeLa cells, of which 243 RAP were identified for the first time. This method aims to refine the RNA-protein interaction network and provide a favorable foundation for subsequent biological investigations.

Key words: RNA binding protein, Proteomics, Enrichment, Separation, Mass spectrometry

CLC Number: 

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