Chromosomal organization at the level of gene complexes.

Chromosomal organization at the level of gene complexes.
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DOI:
10.1007/s00018-010-0585-2
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发表时间:
2011-03
影响因子:
8
通讯作者:
Chopra, Vivek S.
Chopra, Vivek S.
中科院分区:
生物学1区
文献类型:
--
作者:
Chopra, Vivek S.

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与编码区相比,后生动物基因组主要由非编码 DNA 组成。基因组的非编码部分含有顺式调控元件,确保在发育过程中在正确的时间和空间正确读取遗传密码。调控元件及其目标基因定义了基因组内的功能景观,并且一些发育上重要的基因通过将参与公共器官/组织规范的基因保持在簇中而进化,被称为基因复合体。参与共同功能的基因的聚类可能有助于稳健的时空基因表达。基因复合体通常被发现在进化上是保守的,典型的例子是 hox 复合体。基因复合体之间的进化限制为理解基因功能的顺式和反式调节提供了一个理想的模型系统。本综述将讨论基因复合物中发现的基因调控模块的各种特征以及如何表征它们。
Metazoan genomes primarily consist of non-coding DNA in comparison to coding regions. Non-coding fraction of the genome contains cis-regulatory elements, which ensure that the genetic code is read properly at the right time and space during development. Regulatory elements and their target genes define functional landscapes within the genome, and some developmentally important genes evolve by keeping the genes involved in specification of common organs/tissues in clusters and are termed gene complex. The clustering of genes involved in a common function may help in robust spatio-temporal gene expression. Gene complexes are often found to be evolutionarily conserved, and the classic example is the hox complex. The evolutionary constraints seen among gene complexes provide an ideal model system to understand cis and trans-regulation of gene function. This review will discuss the various characteristics of gene regulatory modules found within gene complexes and how they can be characterized.
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