RnBeads
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RnBeads

RnBeads is an R package for comprehensive analysis of DNA methylation data obtained with any experimental protocol that provides single-CpG resolution. Supported assays include Infinium 450K microarray and bisulfite sequencing protocols, and also MeDIP-seq and MBD-seq once the data have been preprocessed with DNA methylation level inference software. RnBeads implements an analysis workflow that is significantly more comprehensive than those of existing tools. It documents its results in a highly annotated and readable hypertext report, and it scales to the large sample sizes that are becoming the norm for DNA methylation analysis in human cohorts.

NOTE: If you have suggestions for improving RnBeads or if you run into technical problems, please feel free to contact us at rnbeads@mpi-inf.mpg.de - ideally with a detailed description and test case illustrating your point.

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Installation

To install RnBeads, please follow the installation instructions on the download page or in the package vignette.

Documentation

The figure below illustrates the general workflow of RnBeads. The full documentation is available in the package vignette and the reference manual.


Various DNA methylation assays and input formats are supported. The pipeline implements state-of-the-art normalization techniques. Experimental quality control can be conducted and sample outliers and mix-ups can be identified. The package provides flexible methods for CpG and sample filtering. According to sample annotations, batch effects and phenotype covariates can be identified. DNA methylation distributions are analyzed and intergroup as well as intragroup variability in methylation profiles is quantified. Furthermore, differential methylation between groups of samples can be characterized. The analysis is based on individual CpGs as well as on predefined or custom genomic regions. Finally, methylation data can be exported in various formats including genome browser views. Comprehensive, highly interpretable reports containing method descriptions, publication grade plots and data tables are generated. Their HTML format facilitates easy tracking and comparison of analyses as well as exchanging results with collaboration partners. Due to its modularized concept, both first-time users and experts can conveniently perform analyses according to their individual demands. A single, comprehensive analysis run can be invoked by specifying only few parameters and executing a master command. Alternatively, a user may execute the steps of the pipeline individually.

Development

RnBeads is available as an open source R package. We encourage user feedback and contributions. If you have any feature requests or want to use or contribute to the RnBeads source code, please contact us at rnbeads@mpi-inf.mpg.de and we will be happy to assist you.