螺旋多肽链中的孤子与生物现象  

Solitons in helix polypeptide chain and biological phenomena

作　　者：徐济仲[1] 

机构地区：[1]湖北大学物理学与电子技术学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2000年第2期131-139,共9页Journal of Hubei University：Natural Science

摘　　要：提出了一个描述螺旋多肽链的氢键链间耦合模型 .得到了扭结团 ,包络孤子团和呼吸子团 .其中对称和非对称扭结团分别对应于螺旋多肽链的压缩 (或扩张 )和扭曲变形区 .螺旋多肽链的扭曲变形使其产生固有压电效应 .非对称包络孤子的运动使螺旋多肽链蠕动 ,正像蚯蚓的蠕动一样 .指出了螺旋多肽链的扭曲变形结构比其均匀螺旋结构更稳定 ,和由螺旋多肽链的扭曲变形而产生的附加电荷间的静电吸引有助于蛋白质链折叠为三级结构 .A coupling model between the hydrogen-bonded chains to describe the helix polypeptide chain is suggested. The kink group, envelope-soliton and breather groups are obtained. In which symmetric and asymmetric kink groups correspond to the contraction (or expansion) and the twisting deformed regions of helix polypeptide chain, respectively. The twisting deformation produces the intrinsical piezoelectric effect in helix polypeptide chain. The motion of asymmetric envelope-soliton group will result in the wriggle of the helix polypeptide chain, just like that of an earthworm. It is shown that the twisting deformed structure of helix polypeptide chain is more stable than the uniform helix structure and the static attraction between the extra charges arising from deformation of helix polypeptide chain is advantageous to fold protein chain into the tertiary structure. The qualitative descriptions for the lumped structure of myosin molecule, the piezoelectricity of bone and the mechanism of muscle contraction are given by means of soliton mechanism in the helix polypeptide chain.

关 键 词：螺旋多肽链 孤子产 氢键链间耦合模型 生物现象 

分 类 号：Q516[生物学—生物化学]