Protein Tpr is required for establishing nuclear pore-associated zones of heterochromatin exclusion.
Protein Tpr is required for establishing nuclear pore-associated zones of heterochromatin exclusion.
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DOI:
10.1038/emboj.2010.54
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发表时间:
2010-05-19
期刊:
影响因子:
11.4
通讯作者:
Cordes, Volker C.
中科院分区:
文献类型:
--
作者:
Krull, Sandra;Doerries, Julia;Boysen, Bjoern;Reidenbach, Sonja;Magnius, Lars;Norder, Helene;Thyberg, Johan;Cordes, Volker C.
Amassments of heterochromatin in somatic cells occur in close contact with the nuclear envelope (NE) but are gapped by channel- and cone-like zones that appear largely free of heterochromatin and associated with the nuclear pore complexes (NPCs). To identify proteins involved in forming such heterochromatin exclusion zones (HEZs), we used a cell culture model in which chromatin condensation induced by poliovirus (PV) infection revealed HEZs resembling those in normal tissue cells. HEZ occurrence depended on the NPC-associated protein Tpr and its large coiled coil-forming domain. RNAi-mediated loss of Tpr allowed condensing chromatin to occur all along the NE's nuclear surface, resulting in HEZs no longer being established and NPCs covered by heterochromatin. These results assign a central function to Tpr as a determinant of perinuclear organization, with a direct role in forming a morphologically distinct nuclear sub-compartment and delimiting heterochromatin distribution.
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影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
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