alexa A gram distribution kernel applied to glycan classification and motif extraction.
Biochemistry

Biochemistry

Journal of Glycobiology

Author(s): Kuboyama T, Hirata K, AokiKinoshita KF, Kashima H, Yasuda H

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Abstract We propose a novel general-purpose tree kernel and apply it to glycan structure analysis. Our kernel measures the similarity between two labeled trees by counting the number of common q-length substrings (tree q-grams) embedded in the trees for all possible lengths q. We apply our tree kernel using a support vector machine (SVM) to classification and specific feature extraction from glycan structure data. Our results show that our kernel outperforms the layered trimer kernel of Hizukuri et al. which is well tailored to glycan data while we do not adjust our kernel to glycan-specific properties. In addition, we extract specific features from various types of glycan data using our trained SVM. The results show that our kernel is more flexible and capable of finding a wider variety of substructures from glycan data.
This article was published in Genome Inform and referenced in Journal of Glycobiology

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