Basic4Cseq: an R/Bioconductor package for analyzing 4C-seq data.

ABSTRACT

SUMMARY: Basic4Cseq is an R/Bioconductor package for basic filtering, analysis and subsequent near-cis visualization of 4C-seq data. The package processes aligned 4C-seq raw data stored in binary alignment/map (BAM) format and maps the short reads to a corresponding virtual fragment library. Functions are included to create virtual fragment libraries providing chromosome position and further information on 4C-seq fragments (length and uniqueness of the fragment ends, and blindness of a fragment) for any BSGenome package. An optional filter is included for BAM files to remove invalid 4C-seq reads, and further filter functions are offered for 4C-seq fragments. Additionally, basic quality controls based on the read distribution are included. Fragment data in the vicinity of the experiment's viewpoint are visualized as coverage plot based on a running median approach and a multi-scale contact profile. Wig files or csv files of the fragment data can be exported for further analyses and visualizations of interactions with other programs. AVAILABILITY AND IMPLEMENTATION Basic4Cseq is implemented in R and available at http//www.bioconductor.org/. A vignette with detailed descriptions of the functions is included in the package. CONTACT Carolin.Walter@uni-muenster.de SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.