中国物理B ›› 2012, Vol. 21 ›› Issue (3): 38702-038702.doi: 10.1088/1674-1056/21/3/038702

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孙婷婷1,马海珠1,姜舟婷2   

  • 收稿日期:2011-03-02 修回日期:2011-10-10 出版日期:2012-02-15 发布日期:2012-02-15
  • 通讯作者: 孙婷婷,Tingtingsun@mail.zjgsu.edu.cn E-mail:Tingtingsun@mail.zjgsu.edu.cn

Effect of channel–protein interaction on translocation of a protein-like chain through a finite channel

Sun Ting-Ting(孙婷婷)a)†, Ma Hai-Zhu(马海珠)a), and Jiang Zhou-Ting(姜舟婷)b)   

  1. a. School of Information and Electronic Engineering, Zhejiang Gongshang University, Hangzhou 310018, China;
    b. Department of Physics, China Jiliang University, Hangzhou 310018, China
  • Received:2011-03-02 Revised:2011-10-10 Online:2012-02-15 Published:2012-02-15
  • Contact: Sun Ting-Ting,Tingtingsun@mail.zjgsu.edu.cn E-mail:Tingtingsun@mail.zjgsu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 20904047), the Science and Technology Planning Project of Zhejiang Province, China (Grant No. 20100022), and the Natural Science Foundation of Zhejiang Province, China (Grant No. Y6110304).

Abstract: We study the translocation of a protein-like chain through a finite cylindrical channel using the pruned-enriched Rosenbluth method (PERM) and the modified orientation-dependent monomer-monomer interaction (ODI) model. Attractive channels (εcp=-2.0, -1.0, -0.5), repulsive channels (εcp=0.5, 1.0, 2.0), and a neutral channel (εcp =0) are discussed. The results of the chain dimension and the energy show that Z0=1.0 is an important case to distinguish the types of the channels. For the strong attractive channel, more contacts form during the process of translocation. It is also found that an external force is needed to drive the chain outside of the channel with the strong attraction. While for the neutral, the repulsive, and the weak attractive channels, the translocation is spontaneous.

Key words: pruned-enriched Rosenbluth method, translocation, protein-like chain

中图分类号:  (Transport, including channels, pores, and lateral diffusion)

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