Substrate interaction defects in histidyl-tRNA synthetase linked to dominant axonal peripheral neuropathy.
Substrate interaction defects in histidyl-tRNA synthetase linked to dominant axonal peripheral neuropathy.
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DOI:
10.1002/humu.23380
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发表时间:
2018-03
期刊:
影响因子:
3.9
通讯作者:
Francklyn C
中科院分区:
文献类型:
--
作者:
Abbott JA;Meyer-Schuman R;Lupo V;Feely S;Mademan I;Oprescu SN;Griffin LB;Alberti MA;Casasnovas C;Aharoni S;Basel-Vanagaite L;Züchner S;De Jonghe P;Baets J;Shy ME;Espinós C;Demeler B;Antonellis A;Francklyn C
Histidyl-tRNA synthetase (HARS) ligates histidine to cognate tRNA molecules, which is required for protein translation. Mutations in HARS cause the dominant axonal peripheral neuropathy Charcot Marie-Tooth disease type 2W (CMT2W); however, the precise molecular mechanism remains undefined. Here, we investigated three HARS missense mutations associated with CMT2W (p.Tyr330Cys, p.Ser356Asn, and p.Val155Gly). The three mutations localize to the HARS catalytic domain and failed to complement deletion of the yeast ortholog (HTS1). Enzyme kinetics, differential scanning fluorimetry (DSF), and analytical ultra centrifugation (AUC) were employed to assess the effect of these substitutions on primary aminoacylation function and overall dimeric structure. Notably, the p.Tyr330Cys, p.Ser356Asn, and p.Val155Gly HARS substitutions all led to reduced aminoacylation, providing a direct connection between CMT2W-linked HARS mutations and loss of canonical ARS function. While DSF assays revealed that only one of the variants (p.Val155Gly) was less thermally stable relative to WT, all three HARS mutants formed stable dimers, as measured by AUC. Our work represents the first biochemical analysis of CMT-associated HARS mutations and underscores how loss of the primary aminoacylation function can contribute to disease pathology.
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影响因子:
64.8
作者:
He W;Bai G;Zhou H;Wei N;White NM;Lauer J;Liu H;Shi Y;Dumitru CD;Lettieri K;Shubayev V;Jordanova A;Guergueltcheva V;Griffin PR;Burgess RW;Pfaff SL;Yang XL
通讯作者:
Yang XL
影响因子:
6.1
作者:
Frohlich, Dominik;Suchowerska, Alexandra K.;Klugmann, Matthias
通讯作者:
Klugmann, Matthias
DOI:
10.1136/jnnp-2013-305049
发表时间:
2013-11
期刊:
Journal of neurology, neurosurgery, and psychiatry
影响因子:
--
作者:
Gonzalez M;McLaughlin H;Houlden H;Guo M;Yo-Tsen L;Hadjivassilious M;Speziani F;Yang XL;Antonellis A;Reilly MM;Züchner S;Inherited Neuropathy Consortium
通讯作者:
Inherited Neuropathy Consortium
影响因子:
9.8
作者:
Antonellis, A;Ellsworth, RE;Green, ED
通讯作者:
Green, ED
影响因子:
2.4
作者:
Brookes, Emre;Demeler, Borries
通讯作者:
Demeler, Borries