Actin-dependent intranuclear repositioning of an active gene locus in vivo.
Actin-dependent intranuclear repositioning of an active gene locus in vivo.
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DOI:
10.1083/jcb.200710058
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发表时间:
2007-12-17
期刊:
影响因子:
--
通讯作者:
Matera AG
中科院分区:
文献类型:
--
作者:
Dundr M;Ospina JK;Sung MH;John S;Upender M;Ried T;Hager GL;Matera AG
Although bulk chromatin is thought to have limited mobility within the interphase eukaryotic nucleus, directed long-distance chromosome movements are not unknown. Cajal bodies (CBs) are nuclear suborganelles that nonrandomly associate with small nuclear RNA (snRNA) and histone gene loci in human cells during interphase. However, the mechanism responsible for this association is uncertain. In this study, we present an experimental system to probe the dynamic interplay of CBs with a U2 snRNA target gene locus during transcriptional activation in living cells. Simultaneous four-dimensional tracking of CBs and U2 genes reveals that target loci are recruited toward relatively stably positioned CBs by long-range chromosomal motion. In the presence of a dominant-negative mutant of β-actin, the repositioning of activated U2 genes is markedly inhibited. This supports a model in which nuclear actin is required for these rapid, long-range chromosomal movements.
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影响因子:
7.8
作者:
Frey, M R;Matera, A G
通讯作者:
Matera, A G
影响因子:
7.5
作者:
Cremer, Thomas;Cremer, Marion;Fakan, Stanislav
通讯作者:
Fakan, Stanislav
影响因子:
1.6
作者:
CALLAN, HG;GALL, JG;MURPHY, C
通讯作者:
MURPHY, C
DOI:
10.1083/jcb.200602002
发表时间:
2006-03-13
期刊:
The Journal of cell biology
影响因子:
--
作者:
Matera AG
通讯作者:
Matera AG
DOI:
10.1139/o06-069
发表时间:
2006-08-01
期刊:
BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE
影响因子:
--
作者:
Hofmann, Wilma A.;Johnson, Terezina;de Lanerolle, Primal
通讯作者:
de Lanerolle, Primal