Dissecting the concordant and disparate roles of NDUFAF3 and NDUFAF4 in mitochondrial complex I biogenesis.

Dissecting the concordant and disparate roles of NDUFAF3 and NDUFAF4 in mitochondrial complex I biogenesis.
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剖析NDUFAF3和NDUFAF4在线粒体复合物I生物发生中的一致性和不同作用。

DOI:
10.1016/j.isci.2021.102869
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发表时间:
2021-08-20
期刊:
影响因子:
5.8
通讯作者:
Owusu-Ansah E
Owusu-Ansah E
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Murari A;Rhooms SK;Garcia C;Liu T;Li H;Mishra B;Deshong C;Owusu-Ansah E

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线粒体复合物I(CI)的不同亚组装体(模块)在CI组装因子(CIAF)的帮助下通过不完全定义的机制组装。在这里,使用果蝇的遗传分析,我们报告说,当任何一个CIAFs -NDUFAF 3或NDUFAF 4-被破坏,生物合成的Q-,N-和PP-B-模块的CI受损。这至少部分是由于NDUFS 3和NDUFS 5分别整合到Q-和PP-b-模块中的受损,以及组装中间体中另一个CIAF TIMMDC 1的不稳定。值得注意的是,当NDUFAF 3被破坏时,NDUFAF 4的强制表达挽救了CI的Q-模块中的生物发生缺陷和PP-b-模块中的缺陷的一些方面。总之,我们的研究为NDUFAF 3和NDUFAF 4调节CI组装的机制提供了新的基本见解,并提出了NDUFAF 3中某些点突变可能通过NDUFAF 4的过表达而被拯救的可能性。NDUFAF 3和NDUFAF 4在果蝇肌肉中的破坏使TIMMDC 1不稳定NDUFAF 3和NDUFAF 4调节N、Q和Pp模块的生物合成NDUFAF 4改善NDUFAF 3突变体中的一些CI生物合成缺陷分子遗传学;基因调控的分子机制;代谢工程
Distinct sub-assemblies (modules) of mitochondrial complex I (CI) are assembled with the assistance of CI Assembly Factors (CIAFs) through mechanisms that are incompletely defined. Here, using genetic analyses in Drosophila, we report that when either of the CIAFs – NDUFAF3 or NDUFAF4 – is disrupted, biogenesis of the Q-, N-, and PP-b-modules of CI is impaired. This is due, at least in part, to the compromised integration of NDUFS3 and NDUFS5 into the Q-, and PP-b-modules, respectively, coupled with a destabilization of another CIAF, TIMMDC1, in assembly intermediates. Notably, forced expression of NDUFAF4 rescues the biogenesis defects in the Q-module and some aspects of the defects in the PP-b-module of CI when NDUFAF3 is disrupted. Altogether, our studies furnish new fundamental insights into the mechanism by which NDUFAF3 and NDUFAF4 regulate CI assembly and raises the possibility that certain point mutations in NDUFAF3 may be rescued by overexpression of NDUFAF4. Disruption of NDUFAF3 and NDUFAF4 in Drosophila muscles destabilizes TIMMDC1 NDUFAF3 and NDUFAF4 regulate biogenesis of the N, Q, and Pp modules NDUFAF4 ameliorates some of the CI biogenesis defects in NDUFAF3 mutants Molecular genetics; Molecular mechanism of gene regulation; Metabolic Engineering
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