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Pre-SCNAClonal: Efficient GC bias correction for SCNA based tumor subclonal populations inferring

Somatic copy number alternations (SCNAs) can be utilized to infer tumor subclonal populations in whole genome seuqncing studies, where usually their read count ratios between tumor-normal paired samples serve as the inferring proxy. We found that, in a GC study, the GC contents and read count ratios on SCNA segments present a Log linear biased pattern. However, currently no subclonal inferring tools take into account this information. We provide Pre-SCNAClonal, a comprehensive GC bias correction tool for inferring tumor subclonal populations based on SCNAs. Results show that Pre-SCNAClonal could effectively and robustly correct the GC bias and improve the performance of the SCNAs based tumor subclonal population inferring tools. Pre-SCNAClonal could be strung together with the SCNAs based subclonal population inferring tool as a pipeline or run individually as needed. Pre-SCNAClonal is publicly available as a Python package: https://github.com/dustincys/Pre-SCNAClonal