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# Probabilistic modelling of chromatin code landscape reveals functional diversity of enhancer-like chromatin states

## Author(s): Zhou, J; Troyanskaya, Olga G

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 Abstract: Interpreting the functional state of chromatin from the combinatorial binding patterns of chromatin factors, that is, the chromatin codes, is crucial for decoding the epigenetic state of the cell. Here we present a systematic map of Drosophila chromatin states derived from data-driven probabilistic modelling of dependencies between chromatin factors. Our model not only recapitulates enhancer-like chromatin states as indicated by widely used enhancer marks but also divides these states into three functionally distinct groups, of which only one specific group possesses active enhancer activity. Moreover, we discover a strong association between one specific enhancer state and RNA Polymerase II pausing, linking transcription regulatory potential and chromatin organization. We also observe that with the exception of long-intron genes, chromatin state transition positions in transcriptionally active genes align with an absolute distance to their corresponding transcription start site, regardless of gene length. Using our method, we provide a resource that helps elucidate the functional and spatial organization of the chromatin code landscape. Publication Date: 4-Feb-2016 Electronic Publication Date: 4-Feb-2016 Citation: Zhou, J, Troyanskaya, OG. (2016). Probabilistic modelling of chromatin code landscape reveals functional diversity of enhancer-like chromatin states. Nature Communications, 7 (10.1038/ncomms10528 DOI: doi:10.1038/ncomms10528 Type of Material: Journal Article Journal/Proceeding Title: Nature Communications Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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