Two Polar Residues Within C-terminal Domain of M1 are Critical for the Formation of Influenza A Virus Matrix Layer----中国科学院微生物研究所

科研成果

论文题目:	Two Polar Residues Within C-terminal Domain of M1 are Critical for the Formation of Influenza A Virus Matrix Layer
作者:	Zhang Ke#, Wang Zhao#, Fan Gui-Zhen, Wang Juan, Gao Shengyan, Li Yun, Sun Lei, Yin Chang-Cheng, and Liu Wen-Jun.
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刊物名称:	Cell Microbiol
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年份:	2015
影响因子:	5.044
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摘要:	The matrix protein 1 (M1) is the most abundant structural protein in influenza A virus particles. It oligomerizes to form the matrix layer under the lipid membrane, sustaining stabilization of the morphology of the virion. The present study indicates M1 forms oligomers based on a four-fold symmetrical oligomerization pattern. Further analysis revealed that the oligomerization pattern of M1 was controlled by a highly conserved region within the C-terminal domain. Two polar residues of this region, serine-183 (S183) and Threonine-185 (T185), were identified to be critical for the oligomerization pattern of M1. M1 point mutants suggest that single S183A or T185A substitution could result in the production of morphologically filamentous particles, while double substitutions, M1-S183A/T185A, totally disrupted the four-fold symmetry and resulted in the failure of virus production. These data indicate that the polar groups in these residues are essential to control the oligomerization pattern of M1. Thus, the present study will aid in determining the mechanisms of influenza A virus matrix layer formation during virus morphogenesis.