Codon Usage Bias and Determining Forces in Taenia solium Genome

Xing Yang; Xusheng Ma; Xuenong Luo; Houjun Ling; Xichen Zhang; Xuepeng Cai

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자료유형: 학술저널

저자정보: Xing Yang (Jilin University) Xusheng Ma (Chinese Academy of Agricultural Sciences) Xuenong Luo (Jilin University) Houjun Ling (Jilin University) Xichen Zhang (Jilin University) Xuepeng Cai (Jilin University)

저널정보: 대한기생충학열대의학회 Parasites, Hosts and Diseases The Korean Journal of Parasitology Vol.53 No.6

발행연도: 2015.12

수록면: 689 - 697 (9page)

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The tapeworm Taenia solium is an important human zoonotic parasite that causes great economic loss and also endangers public health. At present, an effective vaccine that will prevent infection and chemotherapy without any side effect remains to be developed. In this study, codon usage patterns in the T. solium genome were examined through 8,484 protein-coding genes. Neutrality analysis showed that T. solium had a narrow GC distribution, and a significant correlation was observed between GC12 and GC3. Examination of an NC (ENC vs GC3s)-plot showed a few genes on or close to the expected curve, but the majority of points with low-ENC (the effective number of codons) values were detected below the expected curve, suggesting that mutational bias plays a major role in shaping codon usage. The Parity Rule 2 plot (PR2) analysis showed that GC and AT were not used proportionally. We also identified 26 optimal codons in the T. solium genome, all of which ended with either a G or C residue. These optimal codons in the T. solium genome are likely consistent with tRNAs that are highly expressed in the cell, suggesting that mutational and translational selection forces are probably driving factors of codon usage bias in the T. solium genome.

#Taenia solium #codon usage bias #translation selection #mutation bias #intron number

참고문헌 (45)

참고문헌 신청

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