COMBINATORIAL SINGLE MOLECULE ANALYSIS OF CHROMATIN

    公开(公告)号:US20190284603A1

    公开(公告)日:2019-09-19

    申请号:US15754222

    申请日:2016-08-19

    IPC分类号: C12Q1/6806 G01N33/68

    摘要: The present invention provides for single-molecule profiling of combinatorial protein modifications and single-molecule profiling of combinatorial protein modifications combined with single-molecule sequencing of protein/nucleic acids complexes. High-throughput single-molecule imaging was applied to decode combinatorial modifications on millions of individual nucleosomes from pluripotent stem cells and lineage-committed cells. Applicants identified bivalent nucleosomes with concomitant repressive and activating marks, as well as other combinatorial modification states whose prevalence varies with developmental potency. Applying genetic and chemical perturbations of chromatin enzymes show a preferential affect on nucleosomes harboring specific modification states. The present invention also combines this proteomic platform with single-molecule DNA sequencing technology to simultaneously determine the modification states and genomic positions of individual nucleosomes. This novel single-molecule technology can be used to address fundamental questions in chromatin biology and epigenetic regulation leading to novel therapeutics and diagnostics.

    COMBINATORIAL SINGLE MOLECULE ANALYSIS OF CHROMATIN

    公开(公告)号:US20230272452A1

    公开(公告)日:2023-08-31

    申请号:US17989296

    申请日:2022-11-17

    IPC分类号: C12Q1/6806 G01N33/68 C12Q1/68

    摘要: The present invention provides for single-molecule profiling of combinatorial protein modifications and single-molecule profiling of combinatorial protein modifications combined with single-molecule sequencing of protein/nucleic acids complexes. High-throughput single-molecule imaging was applied to decode combinatorial modifications on millions of individual nucleosomes from pluripotent stem cells and lineage-committed cells. Applicants identified bivalent nucleosomes with concomitant repressive and activating marks, as well as other combinatorial modification states whose prevalence varies with developmental potency. Applying genetic and chemical perturbations of chromatin enzymes show a preferential affect on nucleosomes harboring specific modification states. The present invention also combines this proteomic platform with single-molecule DNA sequencing technology to simultaneously determine the modification states and genomic positions of individual nucleosomes. This novel single-molecule technology can be used to address fundamental questions in chromatin biology and epigenetic regulation leading to novel therapeutics and diagnostics.

    Combinatorial single molecule analysis of chromatin

    公开(公告)号:US11479805B2

    公开(公告)日:2022-10-25

    申请号:US15754222

    申请日:2016-08-19

    IPC分类号: C12Q1/6806 G01N33/68 C12Q1/68

    摘要: The present invention provides for single-molecule profiling of combinatorial protein modifications and single-molecule profiling of combinatorial protein modifications combined with single-molecule sequencing of protein/nucleic acids complexes. High-throughput single-molecule imaging was applied to decode combinatorial modifications on millions of individual nucleosomes from pluripotent stem cells and lineage-committed cells. Applicants identified bivalent nucleosomes with concomitant repressive and activating marks, as well as other combinatorial modification states whose prevalence varies with developmental potency. Applying genetic and chemical perturbations of chromatin enzymes show a preferential affect on nucleosomes harboring specific modification states. The present invention also combines this proteomic platform with single-molecule DNA sequencing technology to simultaneously determine the modification states and genomic positions of individual nucleosomes. This novel single-molecule technology can be used to address fundamental questions in chromatin biology and epigenetic regulation leading to novel therapeutics and diagnostics.

    Methods of detecting insulator dysfunction and oncogene activation for screening, diagnosis and treatment of patients in need thereof

    公开(公告)号:US11339442B2

    公开(公告)日:2022-05-24

    申请号:US16061546

    申请日:2016-12-14

    IPC分类号: C12Q1/6886

    摘要: The present application generally to the diagnosis and treatment of diseases resulting from the alteration of chromatin boundaries between topologically-associated domains. In particular, the present application relates to detection of mutations causing DNA hypermethylation phenotypes, CpG methylation within CTCF binding motifs, and aberrant gene expression caused by altered chromatin topology. Applicants show that IDH mutant gliomas exhibit hyper-methylation at CTCF binding sites, compromising binding of this methylation-sensitive insulator protein. Applicants also demonstrate that loss of CTCF at a domain boundary permits a constitutive enhancer to aberrantly interact with the receptor tyrosine kinase gene PDGFRA, a prominent glioma oncogene. Thus, Applicants have uncovered that IDH mutations may promote gliomagenesis by disrupting chromosomal topology and allowing aberrant regulatory interactions that induce oncogene expression.