Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (10): 2055.

• Articles • Previous Articles     Next Articles

Theoretical Investigation of Recoverin′s Normal Mode Analysis

LI Ji-Lai1,2, GENG Cai-Yun2, BU Yu-Xiang1, CHEN Xiao-Hua1, WANG Jun1, HUANG Xu-Ri2*, SUN Chia-Chung2   

  1. 1. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;
    2. State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130021, China
  • Received:2008-09-10 Online:2009-10-10 Published:2009-10-10
  • Contact: HUANG Xu-Ri. E-mail: huangxr@mail.jlu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20773048, 200702019, 20070421075)、山东省博士后创新基金和中国博士后科学基金资助.

Abstract:

Recoverin is an important branch of neuronal calcium sensor. It had been shown recently that half of the known protein movements can be modelled by using at most two low-frequency normal modes. Hence, we investigated their normal modes by rotational translational block method in order to give a deep insight into the nature of the Ca2+-myristoyl switch conformational transition. The normal mode perturbed models of reco-verin T-state revealed that the overall motion of the first lowest mode could be described approximately as a converse-rigid-body-swivel around the inter-domain linker. While in the one Ca2+-bound structure, in addition to the converse-rigid-body-swivel motion, an exposure of the myristoyl group is also detected, which was proposed as bidirectional conformational transition across the domain interface and facilitates the allosteric transition in signal-transduction processes. These observations indicate that recoverin is intrinsically dynamic.

Key words: Allosteric process; Signal transduction; Normal mode analysis; Low frequency vibration

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