Broadly Applicable Control Approaches Improve Accuracy of ChIP-Seq Data.
Broadly Applicable Control Approaches Improve Accuracy of ChIP-Seq Data.
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DOI:
10.3390/ijms24119271
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发表时间:
2023-05-25
影响因子:
5.6
通讯作者:
Aparicio, Oscar M.
中科院分区:
文献类型:
--
作者:
Petrie, Meghan V.;He, Yiwei;Gan, Yan;Ostrow, Andrew Zachary;Aparicio, Oscar M.
Chromatin ImmunoPrecipitation (ChIP) is a widely used method for the analysis of protein–DNA interactions in vivo; however, ChIP has pitfalls, particularly false-positive signal enrichment that permeates the data. We have developed a new approach to control for non-specific enrichment in ChIP that involves the expression of a non-genome-binding protein targeted in the IP alongside the experimental target protein due to the sharing of epitope tags. ChIP of the protein provides a “sensor” for non-specific enrichment that can be used for the normalization of the experimental data, thereby correcting for non-specific signals and improving data quality as validated against known binding sites for several proteins that we tested, including Fkh1, Orc1, Mcm4, and Sir2. We also tested a DNA-binding mutant approach and showed that, when feasible, ChIP of a site-specific DNA-binding mutant of the target protein is likely an ideal control. These methods vastly improve our ChIP-seq results in S. cerevisiae and should be applicable in other systems.
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