酶功能的识别对理解生命活动的机制、推进生命科学的发展有重要作用。然而现有的酶EC编号预测方法，并未充分利用蛋白质序列信息，在识别精度上仍有所不足。针对上述问题，本研究提出一种基于层级特征和全局特征的 EC 编号预测网络(EC number prediction network using hierarchical features and global features，ECPN-HFGF)。该方法首先通过残差网络提取蛋白质序列通用特征，并通过层级特征提取模块和全局特征提取模块进一步提取蛋白质序列的层级特征和全局特征，之后结合两种特征信息的预测结果，采用多任务学习框架，实现酶EC编号的精确预测。计算实验结果表明，ECPN-HFGF方法在蛋白质序列EC编号预测任务上性能最佳，宏观F1值和微观F1值分别达到95。5％和99。0％。ECPN-HFGF方法能有效结合蛋白质序列的层级特征和全局特征，快速准确预测蛋白质序列EC编号，比当前常用方法预测精确度更高，能够为酶学研究和酶工程应用的发展提供一种高效的思路和方法。
EC number prediction of protein sequences based on combination of hierarchical and global features
The identification of enzyme functions plays a crucial role in understanding the mechanisms of biological activities and advancing the development of life sciences.However,existing enzyme EC number prediction methods did not fully utilize protein sequence information and still had shortcomings in identification accuracy.To address this issue,we proposed an EC number prediction network using hierarchical features and global features(ECPN-HFGF).This method first utilized residual networks to extract generic features from protein sequences,and then employed hierarchical feature extraction modules and global feature extraction modules to further extract hierarchical and global features of protein sequences.Subsequently,the prediction results of both feature types were combined,and a multitask learning framework was utilized to achieve accurate prediction of enzyme EC numbers.Experimental results indicated that the ECPN-HFGF method performed best in the task of predicting EC numbers for protein sequences,achieving macro F1 and micro F1 scores of 95.5％and 99.0％,respectively.The ECPN-HFGF method effectively combined hierarchical and global features of protein sequences,allowing for rapid and accurate EC number prediction.Compared to current commonly used methods,this method offers significantly higher prediction accuracy,providing an efficient approach for the advancement of enzymology research and enzyme engineering applications.
enzyme function predictionprotein sequencedeep learninghierarchical multi-label classificationglobal feature
万方数据
维普
