Albert Tucci1, Miguel A Flores-Vergara1, Robert G Franks1

  • 1Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC 27695, USA.

Plants (Basel, Switzerland)
|December 17, 2024
PubMed
概括

开花植物的种子通过创造繁殖障碍来推动多样化. 这项研究推断了Mimulus杂交种子中的基因调节网络,揭示了种子发育和物种化背后的新型遗传机制.

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Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
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Combinatorial gene control is the synergistic action of several transcriptional factors to regulate the expression of a single gene. The absence of one or more of these factors may lead to a significant difference in the level of gene expression or repression.
The expression of more than 30,000 genes is controlled by approximately 2000-3000 transcription factors. This is possible because a single transcription factor can recognize more than one regulatory sequence. The specificity in gene...
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Regulation of Expression at Multiple Steps01:23

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The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...