中文摘要：

进化的观点认为,蛋白质结构的对称性是基因复制和融合的结果,但是由于在长期进化过程中的氨基酸突变,绝大多数现有的蛋白质序列都失去了这种直观的重复性特征。该文简要地回顾了国际上发展的寻找蛋白质序列中重复片段的方法,重点介绍了作者自己提出的分析蛋白质序列和结构对称性的方法以及在蛋白质对称结构形成机理方面的初步工作,并系统分析了各类对称折叠子的序列与结构关系,发现它们的序列都具有隐含的与结构相同的对称性,或者说序列的对称性决定结构的对称性。

英文摘要：

From the view of evolution,the symmetry of protein structure is the result of gene duplication and fusion.However,due to the mutation in evolution,most of proteins have lost their repetitive signals in sequences.In this paper we will briefly review the methods of detecting repeats in protein sequences.In particular,we shall introduce our methods of detecting sequence and structure symmetries of proteins as well as our studies in the mechanism of the formation of symmetric structures of proteins.We investigated the sequence-structure of different types of folds and found their hidden sequence symmetries as the structures or sequence symmetry encodes structural symmetry.