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2015 ; 2015
(ä): 196082
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Assessing Computational Steps for CLIP-Seq Data Analysis
#MMPMID26539468
Liu Q
; Zhong X
; Madison BB
; Rustgi AK
; Shyr Y
Biomed Res Int
2015[]; 2015
(ä): 196082
PMID26539468
show ga
RNA-binding protein (RBP) is a key player in regulating gene expression at the
posttranscriptional level. CLIP-Seq, with the ability to provide a genome-wide
map of protein-RNA interactions, has been increasingly used to decipher
RBP-mediated posttranscriptional regulation. Generating highly reliable binding
sites from CLIP-Seq requires not only stringent library preparation but also
considerable computational efforts. Here we presented a first systematic
evaluation of major computational steps for identifying RBP binding sites from
CLIP-Seq data, including preprocessing, the choice of control samples, peak
normalization, and motif discovery. We found that avoiding PCR amplification
artifacts, normalizing to input RNA or mRNAseq, and defining the background model
from control samples can reduce the bias introduced by RNA abundance and improve
the quality of detected binding sites. Our findings can serve as a general
guideline for CLIP experiments design and the comprehensive analysis of CLIP-Seq
data.