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Structure of the error-prone DNA ligase of African swine fever virus identifies critical active site residues.
Nature Communications ( IF 14.7 ) Pub Date : 2019-01-23 , DOI: 10.1038/s41467-019-08296-w Yiqing Chen 1 , Hehua Liu 1, 2 , Chun Yang 1 , Yanqing Gao 1 , Xiang Yu 1, 2 , Xi Chen 1 , Ruixue Cui 2 , Lina Zheng 2 , Suhua Li 1 , Xuhang Li 2 , Jinbiao Ma 2 , Zhen Huang 3, 4 , Jixi Li 1, 5 , Jianhua Gan 1
Nature Communications ( IF 14.7 ) Pub Date : 2019-01-23 , DOI: 10.1038/s41467-019-08296-w Yiqing Chen 1 , Hehua Liu 1, 2 , Chun Yang 1 , Yanqing Gao 1 , Xiang Yu 1, 2 , Xi Chen 1 , Ruixue Cui 2 , Lina Zheng 2 , Suhua Li 1 , Xuhang Li 2 , Jinbiao Ma 2 , Zhen Huang 3, 4 , Jixi Li 1, 5 , Jianhua Gan 1
Affiliation
African swine fever virus (ASFV) is contagious and can cause highly lethal disease in pigs. ASFV DNA ligase (AsfvLIG) is one of the most error-prone ligases identified to date; it catalyzes DNA joining reaction during DNA repair process of ASFV and plays important roles in mutagenesis of the viral genome. Here, we report four AsfvLIG:DNA complex structures and demonstrate that AsfvLIG has a unique N-terminal domain (NTD) that plays critical roles in substrate binding and catalytic complex assembly. In combination with mutagenesis, in vitro binding and catalytic assays, our study reveals that four unique active site residues (Asn153 and Leu211 of the AD domain; Leu402 and Gln403 of the OB domain) are crucial for the catalytic efficiency of AsfvLIG. These unique structural features can serve as potential targets for small molecule design, which could impair genome repair in ASFV and help combat this virus in the future.
中文翻译:
非洲猪瘟病毒易错DNA连接酶的结构可确定关键的活性位点残基。
非洲猪瘟病毒(ASFV)具有传染性,可在猪中引起高度致死性疾病。ASFV DNA连接酶(AsfvLIG)是迄今为止鉴定出的最容易出错的连接酶之一;它在ASFV的DNA修复过程中催化DNA连接反应,并在病毒基因组诱变中起重要作用。在这里,我们报告四个AsfvLIG:DNA复杂结构,并证明AsfvLIG具有独特的N末端域(NTD),在底物结合和催化复合物组装中起关键作用。结合诱变,体外结合和催化分析,我们的研究表明,四个独特的活性位点残基(AD域的Asn153和Leu211; OB域的Leu402和Gln403)对于AsfvLIG的催化效率至关重要。这些独特的结构特征可以作为小分子设计的潜在目标,
更新日期:2019-01-23
中文翻译:
非洲猪瘟病毒易错DNA连接酶的结构可确定关键的活性位点残基。
非洲猪瘟病毒(ASFV)具有传染性,可在猪中引起高度致死性疾病。ASFV DNA连接酶(AsfvLIG)是迄今为止鉴定出的最容易出错的连接酶之一;它在ASFV的DNA修复过程中催化DNA连接反应,并在病毒基因组诱变中起重要作用。在这里,我们报告四个AsfvLIG:DNA复杂结构,并证明AsfvLIG具有独特的N末端域(NTD),在底物结合和催化复合物组装中起关键作用。结合诱变,体外结合和催化分析,我们的研究表明,四个独特的活性位点残基(AD域的Asn153和Leu211; OB域的Leu402和Gln403)对于AsfvLIG的催化效率至关重要。这些独特的结构特征可以作为小分子设计的潜在目标,