Assembly of the transcription machinery: ordered and stable, random and dynamic, or both?
Assembly of the transcription machinery: ordered and stable, random and dynamic, or both?
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DOI:
10.1007/s00412-011-0340-y
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发表时间:
2011-12
期刊:
影响因子:
1.6
通讯作者:
McNally JG
中科院分区:
文献类型:
--
作者:
Stasevich TJ;McNally JG
The assembly of the transcription machinery is a key step in gene activation, but even basic details of this process remain unclear. Here we discuss the apparent discrepancy between the classic sequential assembly model based mostly on biochemistry and an emerging dynamic assembly model based mostly on fluorescence microscopy. The former model favors a stable transcription complex with subunits that cooperatively assemble in order, whereas the latter model favors an unstable complex with subunits that may assemble more randomly. To confront this apparent discrepancy, we review the merits and drawbacks of the different experimental approaches and list potential biasing factors that could be responsible for the different interpretations of assembly. We then discuss how these biases might be overcome in the future with improved experiments or new techniques. Finally, we discuss how kinetic models for assembly may help resolve the ordered and stable vs. random and dynamic assembly debate.
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