The N-terminal dimerization is required for TDP-43 splicing activity.
The N-terminal dimerization is required for TDP-43 splicing activity.
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TDP-43 剪接活性需要 N 端二聚化
DOI:
10.1038/s41598-017-06263-3
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发表时间:
2017-07-21
影响因子:
4.6
通讯作者:
Hu HY
中科院分区:
文献类型:
--
作者:
Jiang LL;Xue W;Hong JY;Zhang JT;Li MJ;Yu SN;He JH;Hu HY
TDP-43 is a nuclear factor that functions in promoting pre-mRNA splicing. Deletion of the N-terminal domain (NTD) and nuclear localization signal (NLS) (i.e., TDP-35) results in mislocalization to cytoplasm and formation of inclusions. However, how the NTD functions in TDP-43 activity and proteinopathy remains largely unknown. Here, we studied the structure and function of the NTD in inclusion formation and pre-mRNA splicing of TDP-43 by using biochemical and biophysical approaches. We found that TDP-43 NTD forms a homodimer in solution in a concentration-dependent manner, and formation of intermolecular disulfide results in further tetramerization. Based on the NMR structure of TDP-43 NTD, the dimerization interface centered on Leu71 and Val72 around the β7-strand was defined by mutagenesis and size-exclusion chromatography. Cell experiments revealed that the N-terminal dimerization plays roles in protecting TDP-43 against formation of cytoplasmic inclusions and enhancing pre-mRNA splicing activity of TDP-43 in nucleus. This study may provide mechanistic insights into the physiological function of TDP-43 and its related proteinopathies.
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影响因子:
4.6
作者:
Jiang LL;Zhao J;Yin XF;He WT;Yang H;Che MX;Hu HY
通讯作者:
Hu HY
影响因子:
4.8
作者:
Johnson, Brian S.;Snead, David;Gitler, Aaron D.
通讯作者:
Gitler, Aaron D.
影响因子:
4
作者:
Ayala, Youhna M.;Zago, Paola;Baralle, Francisco E.
通讯作者:
Baralle, Francisco E.
影响因子:
4.8
作者:
Fuentealba, Rodrigo A.;Udan, Maria;Baloh, Robert H.
通讯作者:
Baloh, Robert H.
影响因子:
4.8
作者:
Budini, Mauricio;Buratti, Emanuele;Baralle, Francisco E.
通讯作者:
Baralle, Francisco E.