JHU biomedical engineering primary faculty
Michael Beer, PhD
Associate Professor, Department of Biomedical Engineering and McKusick-Nathans Institute of Genetic MedicineOffice: Miller Research Building 573
Lab: Beer Lab
The ultimate goal of our research is to understand how gene regulatory information is encoded in genomic DNA sequence. Recently progress has been made in understanding how DNA sequence features specify cell-type specific mammalian enhancer activity by using kmer-based SVM machine learning approaches.
Beer’s work uses functional genomics DNase-seq, ChIP-seq, RNA-seq, and chromatin state data to computationally identify combinations of transcription factor binding sites which operate to define the activity of cell-type specific enhancers. Current focus is on:
- improving SVM methodology by including more general sequence features and constraints
- predicting the impact of SNPs on enhancer activity (delta-SVM) and GWAS association for specific diseases
- experimentally assessing the predicted impact of regulatory element mutation in mammalian cells
- systematically determining regulatory element logic from ENCODE human and mouse data
- using this sequence based regulatory code to assess common modes of regulatory element evolution and variation
Dr. Beer’s lab is located in the McKusick-Nathans Institute for Genetic Medicine, and the Department of Biomedical Engineering, which has long been a leader in the development of rigorous quantitative modeling of biological systems, and is a natural home for graduate studies in bioinformatics and computational biology at Johns Hopkins, including research in genomics, systems biology, machine learning, and network modeling.
Lee, D, Gorkin, DU, Baker, M, Strober, BJ, Asoni, A, McCallion, AS, Beer, MA, A method to predict the impact of regulatory variants from DNA sequence, advance online publication in Nature Genetics (2015).
Yue, F, Cheng, Y, Breshi, A, Vierstra, J, and many others, including Beer, MA, A comparative encyclopedia of DNA elements in the mouse genome. Nature 515, 355–364 (2014). (co-first author and co-corresponding author).
Mammalian Enhancer Prediction. Lee D, Beer MA. 2014. Genome Analysis: Current Procedures and Applications. Horizon Press (in press).
Robust k-mer Frequency Estimation Using Gapped k-mers. Ghandi M, Mohammad-Noori M, and Beer MA. 2013. Journal of Mathematical Biology. (Epub ahead of print).
kmer-SVM: a web server for identifying predictive regulatory sequence features in genomic datasets. Fletez-Brant C*, Lee D*, McCallion AS and Beer MA. 2013. Nucleic Acids Research 41: W544–W556.
Integration of ChIP-seq and Machine Learning Reveals Enhancers and a Predictive Regulatory Sequence Vocabulary in Melanocytes. Gorkin DU, Lee D, Reed X, Fletez-Brant C, Blessling SL, Loftus SK, Beer MA, Pavan WJ, and McCallion AS. 2012. Genome Research 22:2290–2301.
Discriminative prediction of mammalian enhancers from DNA sequence. Lee D, Karchin R, and Beer MA. 2011. Genome Research 21:2167–2180.