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• W3037967545 abstract "In this article, based on z-curve theory and position weight matrix (PWM), a model for nucleosome sequences was constructed. Nucleosome sequence dataset was transformed into three-dimensional coordinates, PWM of the nucleosome sequences was calculated and the similarity score was obtained. After integrating them, a nucleosome feature model based on the comprehensive DNA sequences was obtained and named CSeqFM. We calculated the Euclidean distance between nucleosome sequence candidates or linker sequences and CSeqFM model as the feature dataset, and put the feature datasets into the support vector machine (SVM) for training and testing by ten-fold cross-validation. The results showed that the sensitivity, specificity, accuracy and Matthews correlation coefficient (MCC) of identifying nucleosome positioning for S. cerevisiae were 97.1%, 96.9%, 94.2% and 0.89, respectively, and the area under the receiver operating characteristic curve (AUC) was 0.980 1. Compared with another z-curve method, it was found that our method had better identifying effect and each evaluation performance showed better superiority. CSeqFM method was applied to identify nucleosome positioning for other three species, including C. elegans, H. sapiens and D. melanogaster. The results showed that AUCs of the three species were all higher than 0.90, and CSeqFM method also showed better stability and effectiveness compared with iNuc-STNC and iNuc-PseKNC methods, which is further demonstrated that CSeqFM method has strong reliability and good identification performance.本文基于 Z 曲线（z-curve）理论和位置权重矩阵（PWM）提出一种构建核小体 DNA 序列的模型。该模型将核小体 DNA 序列集转换成三维空间坐标，通过计算该序列集的位置权重矩阵获得相似性权重得分，将两者整合得到综合序列特征模型（CSeqFM），并分别计算候选核小体序列和连接序列到模型 CSeqFM 的欧氏距离作为特征集，投入到支持向量机（SVM）中训练和检验，通过十折交叉验证进行性能评估。结果显示，酵母核小体定位的敏感性、特异性、准确率和 Matthews 相关系数（MCC）分别为 97.1%、96.9%、94.2% 和 0.89，受试者操作特征（receiver operating characteristic，ROC）曲线下面积（area under curve，AUC）达到 0.980 1。与其他相关 Z 曲线方法比较，CSeqFM 方法在各项评估指标中均表现出优势，具有更好的识别效果。同时，将 CSeqFM 方法推广到线虫、人类和果蝇的核小体定位识别中，AUC 均高于 0.90，与 iNuc-STNC 和 iNuc-PseKNC 方法比较，CSeqFM 方法也表现出较好的稳定性和有效性，进一步表明该方法具有较好的可靠性和识别效能。." @default.
• W3037967545 created "2020-07-02" @default.
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• W3037967545 date "2020-06-25" @default.
• W3037967545 modified "2023-09-25" @default.
• W3037967545 title "[Identification of nucleosome positioning using support vector machine method based on comprehensive DNA sequence feature]." @default.
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• W3037967545 doi "https://doi.org/10.7507/1001-5515.201911064" @default.
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