Distant positioning of proteasomal proteolysis relative to actively transcribed genes.
Distant positioning of proteasomal proteolysis relative to actively transcribed genes.
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DOI:
10.1093/nar/gkr069
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发表时间:
2011-06
影响因子:
14.9
通讯作者:
von Mikecz A
中科院分区:
文献类型:
--
作者:
Scharf A;Grozdanov PN;Veith R;Kubitscheck U;Meier UT;von Mikecz A
While it is widely acknowledged that the ubiquitin–proteasome system plays an important role in transcription, little is known concerning the mechanistic basis, in particular the spatial organization of proteasome-dependent proteolysis at the transcription site. Here, we show that proteasomal activity and tetraubiquitinated proteins concentrate to nucleoplasmic microenvironments in the euchromatin. Such proteolytic domains are immobile and distinctly positioned in relation to transcriptional processes. Analysis of gene arrays and early genes in Caenorhabditis elegans embryos reveals that proteasomes and proteasomal activity are distantly located relative to transcriptionally active genes. In contrast, transcriptional inhibition generally induces local overlap of proteolytic microdomains with components of the transcription machinery and degradation of RNA polymerase II. The results establish that spatial organization of proteasomal activity differs with respect to distinct phases of the transcription cycle in at least some genes, and thus might contribute to the plasticity of gene expression in response to environmental stimuli.
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影响因子:
16
作者:
Anindya, Roy;Ayguen, Ozan;Svejstrup, Jesper Q.
通讯作者:
Svejstrup, Jesper Q.
DOI:
10.1083/jcb.200601105
发表时间:
2006-04-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Darzacq X;Kittur N;Roy S;Shav-Tal Y;Singer RH;Meier UT
通讯作者:
Meier UT
DOI:
10.1083/jcb.129.2.287
发表时间:
1995-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Bregman DB;Du L;van der Zee S;Warren SL
通讯作者:
Warren SL
影响因子:
3
作者:
Kiesslich, A;von Mikecz, A;Hemmerich, P
通讯作者:
Hemmerich, P
影响因子:
16
作者:
Ferdous, A;Gonzalez, F;Johnston, SA
通讯作者:
Johnston, SA