Protein structure prediction method based on specific fragment crossing
A technology of protein structure and prediction method, which is applied in the field of protein structure prediction and protein structure prediction based on specific fragment crossover, which can solve the problems of low prediction accuracy and low conformational search ability, and achieve strong search ability, improved precision, and improved accuracy Effect
Active Publication Date: 2019-01-18
ZHEJIANG UNIV OF TECH
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[0006] In order to overcome the defects of low conformation search ability and low prediction accuracy of existing protein structure prediction methods, the present invention provides a protein structure prediction method based on specific fragment crossover with high conformation search ability and high prediction accuracy
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[0034] The present invention will be further described below in conjunction with the accompanying drawings.
[0035] refer to figure 1 and figure 2 , a protein structure prediction method based on specific fragment crossovers, comprising the following steps:
[0036] 1) Input the query sequence, and use Psipred (http: / / bioinf.cs.ucl.ac.uk / psipred / ) to predict the secondary structure information of the query sequence;
[0037]2) Set the population size NP, the maximum number of iterations G, the crossover probability CR, the number of mutation failures M, the maximum number of mutations allowed N, the Boltzmann temperature factor KT, the input fragment library, the predicted secondary structure information, and the number of iterations g = 0;
[0038] 3) Initialize all conformations of the population, and assemble fragments for each conformation in the population until the dihedral angle of each residue in the conformation has been replaced at least once;
[0039] 4) Confo...
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The invention provides a protein structure prediction method based on specific fragment crossing. The protein structure prediction method comprises the following steps: firstly, the secondary structure information of the query sequence is predicted so as to construct a fragment library; secondly, the strategy based on specific fragment crossing is designed, the fitness function of the secondary structure information is established and the crossing mutation strategy is designed; and finally the population is updated according to the proportional fitness allocation method. The algorithm conformation search capacity and the prediction accuracy can be effectively enhanced by using the strategy designed based on specific fragment crossing, and the predicted tertiary structure has a good secondary structure. The protein structure prediction method has high conformation searching capacity and high prediction accuracy.
Description
technical field [0001] The invention relates to the field of bioinformatics, intelligent information processing, computer application, and protein structure prediction, in particular to a protein structure prediction method based on specific segment crossover. Background technique [0002] Protein is an important part of life and the bearer of life activities. The basic unit of protein is amino acid. There are more than 20 common amino acids in nature. Amino acids are composed of central carbon atoms and connected amino groups, carboxyl groups, hydrogen atoms and side chains of amino acids. Amino acids are dehydrated and condensed to form peptide bonds. Amino acids linked by peptide bonds form a long chain called a protein. [0003] Protein molecules play a vital role in the process of biological and cellular chemical reactions. Their structural models and bioactive states have important implications for our understanding and cure of many diseases. Only when proteins are ...
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IPC IPC(8): G16B15/00G16B15/20
Inventor 张贵军马来发王小奇周晓根胡俊
Owner ZHEJIANG UNIV OF TECH