Gene associations: true romance or chance meeting in a nuclear neighborhood?

Gene associations: true romance or chance meeting in a nuclear neighborhood?
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DOI:
10.1083/jcb.200808121
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发表时间:
2008-09-22
影响因子:
7.8
通讯作者:
Clemson, Christine M.
Clemson, Christine M.
中科院分区:
生物学1区
文献类型:
--
作者:
Lawrence, Jeanne B.;Clemson, Christine M.

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最近的许多研究引起了人们对来自不同染色体的共调节基因的核关联的兴趣,经常引起对基因-基因相互作用、交流甚至“浪漫”的解释。然而,在某些情况下,这种关联可能是间接的和罕见的,可能反映了活性和非活性基因在不同核区室中的分离。Brown等人的研究(见本期第页)报告说,红细胞基因的明显关联不是直接相互作用,也不是与一个微小的转录工厂共定位,而是由于许多活性基因与较大的富含剪接因子的斑点(又名,SC 35定义的域)。这种聚类似乎很大程度上是随机的,但受到基因的染色体邻域及其转录状态的影响。这项研究通过在外源染色体背景下检查相同的基因增加了一个新的转折,提供了证据表明这会影响基因在细胞核内形成基因-结构域(或表观基因-基因)关联的倾向。
Many recent studies have raised interest in the nuclear associations of coregulated genes from different chromosomes, often evoking interpretations of gene–gene interactions, communication, and even “romance.” However, in some cases, the associations may be indirect and infrequent and may reflect the segregation of active and inactive genes into different nuclear compartments. The study by Brown et al. (see p. of this issue) reports that the apparent association of erythroid genes is not a direct interaction nor colocalization to one tiny transcription factory but arises as a result of the known clustering of many active genes with larger splicing factor–rich speckles (a.k.a., SC35-defined domains). This clustering appears largely stochastic but is impacted by the chromosomal neighborhood of the gene as well as its transcriptional status. The study adds a new twist by examining the same gene in a foreign chromosomal context, providing evidence that this impacts a gene's propensity to form gene–domain (or apparent gene–gene) associations within nuclei.
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