Structural analyses of a human lysyl-tRNA synthetase mutant associated with autosomal recessive nonsyndromic hearing impairment.
Structural analyses of a human lysyl-tRNA synthetase mutant associated with autosomal recessive nonsyndromic hearing impairment.
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与常染色体隐性遗传非综合征性听力障碍相关的人赖氨酰-tRNA合成酶突变体的结构分析
DOI:
10.1016/j.bbrc.2021.03.093
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发表时间:
2021-03
期刊:
影响因子:
--
通讯作者:
Fang Pengfei
中科院分区:
文献类型:
--
作者:
Wu Siqi;Hei Zhoufei;Zheng Li;Zhou Jintong;Liu Zaizhou;Wang Jing;Fang Pengfei
Aminoacyl-tRNA synthetases (AARSs) catalyze the ligation of amino acids to their cognate tRNAs and therefore play an essential role in protein biosynthesis in all living cells. TheKARSgene in human encodes both cytosolic and mitochondrial lysyl-tRNA synthetase (LysRS). A recent study identified a missense mutation inKARSgene (c.517T > C) that caused autosomal recessive nonsyndromic hearing loss. This mutation led to a tyrosine to histidine (YH) substitution in both cytosolic and mitochondrial LysRS proteins, and decreased their aminoacylation activity to different levels. Here, we report the crystal structure of LysRS YH mutant at a resolution of 2.5 Å. We found that the mutation did not interfere with the active center, nor did it cause any significant conformational changes in the protein. The loops involved in tetramer interface and tRNA anticodon binding site showed relatively bigger variations between the mutant and wild type proteins. Considering the differences between the cytosolic and mitochondrial tRNAlyss, we suggest that the mutation triggered subtle changes in the tRNA anticodon binding region, and the interferences were further amplified by the different D and T loops in mitochondrial tRNAlys, and led to a complete loss of the aminoacylation of mitochondrial tRNAlys.
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影响因子:
5.6
作者:
Quevillon, S;Robinson, JC;Mirande, M
通讯作者:
Mirande, M
DOI:
10.1016/bs.enz.2020.06.009
发表时间:
2020-01-01
期刊:
BIOLOGY OF AMINOACYL-TRNA SYNTHETASES
影响因子:
--
作者:
Jiang, Lei;Jones, Julia;Yang, Xiang-Lei
通讯作者:
Yang, Xiang-Lei
影响因子:
2.9
作者:
Dias, Jose;Octobre, Guillaume;Mirande, Marc
通讯作者:
Mirande, Marc
影响因子:
4.8
作者:
Tolkunova, E;Park, H;Davidson, E
通讯作者:
Davidson, E
影响因子:
4.5
作者:
Motley WW;Seburn KL;Nawaz MH;Miers KE;Cheng J;Antonellis A;Green ED;Talbot K;Yang XL;Fischbeck KH;Burgess RW
通讯作者:
Burgess RW