ATXN3 controls DNA replication and transcription by regulating chromatin structure.
ATXN3 controls DNA replication and transcription by regulating chromatin structure.
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DOI:
10.1093/nar/gkad212
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发表时间:
2023-06-23
影响因子:
14.9
通讯作者:
中科院分区:
文献类型:
--
作者:
The deubiquitinating enzyme Ataxin-3 (ATXN3) contains a polyglutamine (PolyQ) region, the expansion of which causes spinocerebellar ataxia type-3 (SCA3). ATXN3 has multiple functions, such as regulating transcription or controlling genomic stability after DNA damage. Here we report the role of ATXN3 in chromatin organization during unperturbed conditions, in a catalytic-independent manner. The lack of ATXN3 leads to abnormalities in nuclear and nucleolar morphology, alters DNA replication timing and increases transcription. Additionally, indicators of more open chromatin, such as increased mobility of histone H1, changes in epigenetic marks and higher sensitivity to micrococcal nuclease digestion were detected in the absence of ATXN3. Interestingly, the effects observed in cells lacking ATXN3 are epistatic to the inhibition or lack of the histone deacetylase 3 (HDAC3), an interaction partner of ATXN3. The absence of ATXN3 decreases the recruitment of endogenous HDAC3 to the chromatin, as well as the HDAC3 nuclear/cytoplasm ratio after HDAC3 overexpression, suggesting that ATXN3 controls the subcellular localization of HDAC3. Importantly, the overexpression of a PolyQ-expanded version of ATXN3 behaves as a null mutant, altering DNA replication parameters, epigenetic marks and the subcellular distribution of HDAC3, giving new insights into the molecular basis of the disease. Wild-type ATXN3 controls chromatin organization by recruiting HDAC3, thereby increasing heterochromatin and controlling DNA replication and transcription, whereas lack of or PolyQ-expanded ATXN3 triggers mislocalization of HDAC3 and euchromatin prevalence.
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影响因子:
16
作者:
Foti R;Gnan S;Cornacchia D;Dileep V;Bulut-Karslioglu A;Diehl S;Buness A;Klein FA;Huber W;Johnstone E;Loos R;Bertone P;Gilbert DM;Manke T;Jenuwein T;Buonomo SC
通讯作者:
Buonomo SC
影响因子:
3.7
作者:
Camps, Jordi;Erdos, Michael R.;Ried, Thomas
通讯作者:
Ried, Thomas
DOI:
10.1080/19491034.2018.1476793
发表时间:
2018-12-31
期刊:
Nucleus (Austin, Tex.)
影响因子:
--
作者:
Burla R;La Torre M;Merigliano C;Vernì F;Saggio I
通讯作者:
Saggio I
DOI:
10.1073/pnas.1509317112
发表时间:
2015-09-22
影响因子:
11.1
作者:
Berry, Joel;Weber, Stephanie C.;Brangwynne, Clifford P.
通讯作者:
Brangwynne, Clifford P.
影响因子:
3.5
作者:
Burnett, B;Li, FS;Pittman, RN
通讯作者:
Pittman, RN