Role of promoter DNA sequence variations on the binding of EGR1 transcription factor.
Role of promoter DNA sequence variations on the binding of EGR1 transcription factor.
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启动子 DNA 序列变异对 EGR1 转录因子结合的作用。
DOI：
10.1016/j.abb.2014.03.005
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发表时间：
2014
影响因子：
3.9
通讯作者：
Farooq,Amjad
中科院分区：
文献类型：
--
作者：
Mikles,DavidC;Schuchardt,BrettJ;Bhat,Vikas;McDonald,CalebB;Farooq,Amjad
In response to a wide variety of stimuli such as growth factors and hormones, EGR1 transcription factor is rapidly induced and immediately exerts downstream effects central to the maintenance of cellular homeostasis. Herein, our biophysical analysis reveals that DNA sequence variations within the target gene promoters tightly modulate the energetics of binding of EGR1 and that nucleotide substitutions at certain positions are much more detrimental to EGR1–DNA interaction than others. Importantly, the reduction in binding affinity poorly correlates with the loss of enthalpy and gain of entropy—a trend indicative of a complex interplay between underlying thermodynamic factors due to the differential role of water solvent upon nucleotide substitution. We also provide a rationale for the physical basis of the effect of nucleotide substitutions on the EGR1–DNA interaction at atomic level. Taken together, our study bears important implications on understanding the molecular determinants of a key protein–DNA interaction at the cross-roads of human health and disease.
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