Chinese Journal of Magnetic Resonance

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Paramagnetic Labeling of Proteins and Pseudocontact Shift in Structural Biology

YANG Yin,CHEN Jia-liang,SU Xun-cheng*


 
  

  1. State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin 300071, China
  • Received:2013-05-02 Revised:2013-05-06 Online:2014-06-05 Published:2014-06-05
  • About author:*Corresponding author:SU Xun-cheng, Tel: 022-23500623; E-mail: xunchengsu@nankai.edu.cn.
  • Supported by:

    国家重大科学研究计划资助项目(2013CB910200);国家自然科学基金资助项目(21073101, 21273121, 21121002).

Abstract:

The interactions between unpaired electrons and nuclear spins in proteins, usually represented in paramagnetic relaxation enhancement (PRE), pseudocontact shift (PCS) and residual dipolar couplings (RDC), provide rich sources of structural restraints. These paramagnetic effects are valuable in structure determination of protein and protein-ligand complex as well as in elucidation of protein dynamics. Because most proteins do not have paramagnetic centers, generation of paramagnetic restraints usually relies on site-specific labeling of proteins with paramagnetic ions. In this paper, efforts towards paramagnetic labeling of proteins, especially with lanthanide ions, are summarized, and PCS, as a powerful NMR spectroscopic tool for structural biology, is discussed.

Key words: NMR, paramagnetic labeling, protein, lanthanide ion, pseudocontact shift

CLC Number: