PeakSeq enables systematic scoring of ChIP-seq experiments relative to controls.
PeakSeq enables systematic scoring of ChIP-seq experiments relative to controls.
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DOI:
10.1038/nbt.1518
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发表时间:
2009-01
影响因子:
46.9
通讯作者:
Gerstein, Mark B.
中科院分区:
文献类型:
--
作者:
Rozowsky, Joel;Euskirchen, Ghia;Auerbach, Raymond K.;Zhang, Zhengdong D.;Gibson, Theodore;Bjornson, Robert;Carriero, Nicholas;Snyder, Michael;Gerstein, Mark B.
Chromatin immunoprecipitation followed by tag sequencing (ChIP-Seq) using high-throughput next-generation instrumentation is replacing ChIP-chip for mapping of sites of transcription-factor binding and chromatin modification. To develop a scoring approach for this new technique, we produce two deeply sequenced datasets for human RNA polymerase II and STAT1 with matching input-DNA controls. In these, we observe that signal peaks corresponding to sites of potential binding are strongly correlated with peaks in the control, likely revealing features of open chromatin. Based on these observations, we develop a two-pass approach for scoring ChIP-Seq relative to controls. The first pass identifies putative binding sites and compensates for genomic variation in the mappability of sequences. The second pass filters sites not significantly enriched compared to the normalized control, computing precise enrichments and significances. Using our scoring we investigate optimal experimental design – i.e. depth of sequencing and value of replicas (showing marginal information gain beyond two).
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影响因子:
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