OpenLooper (OLP)


Previous research efforts have advanced our understanding of specific chromosomal events, such as DNA transcription,replication, recombination, partitioning, and epigenetic modification. One of the major future challenges in chromosome biology will be to provide an overall framework of how these individual activities are orchestrated and coordinated to maximize their effects in a variety of biological processes that evolve over time.

OpenLooper (OLP) collects genome-wide data on chromatin structures investigated by various high-throughput experimental assays, such as Hi-C, ChIA-PET, ChIP-seq, and RNA-seq. Simultaneously, OLP provides a platform that supports opening and sharing high-throughput sequencing datasets.
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In Focus Articles (last modified: 2019-01-20 08:25:30)

[1] The complex architecture and epigenomic impact of plant T-DNA insertions.  (PLoS Genet. 2019 Jan;15(1):e1007819)

The complex architecture and epigenomic impact of plant T-DNA insertions.


Jupe F, Rivkin AC, Michael TP, Zander M, Motley ST, Sandoval JP, Slotkin RK, Chen H, Castanon R, Nery JR, Ecker JR (PLoS Genet. 2019 Jan;15(1):e1007819)
The bacterium Agrobacterium tumefaciens has been the workhorse in plant genome engineering. Customized replacement of native tumor-inducing (Ti) plasmid elements enabled insertion of a sequence of interest called Transfer-DNA (T-DNA) into any plant genome. Although these transfer mechanisms are well understood, detailed understanding of structure and epigenomic status of insertion events was limit......
PubMed:30657772
[2] μChIP-Seq for Genome-Wide Mapping of In Vivo TF-DNA Interactions in Arabidopsis Root Protoplasts.  (Methods Mol Biol. 2018;1761:249-261)

μChIP-Seq for Genome-Wide Mapping of In Vivo TF-DNA Interactions in Arabidopsis Root Protoplasts.


Para A, Li Y, Coruzzi GM (Methods Mol Biol. 2018;1761:249-261)
Chromatin immunoprecipitation (ChIP) is a widely used method to map the position of DNA-binding proteins such as histones and transcription factors (TFs) upon their interaction with particular regions of the genome. To examine the genomic distribution of a TF in specific cell types in response to a change in nitrogen concentration, we developed a micro-ChIP (μChIP) protocol that requires only ~50......
PubMed:29525963
[3] Chromatin Immunoprecipitation Sequencing (ChIP-Seq) for Transcription Factors and Chromatin Factors ...  (Methods Mol Biol. 2018;1761:231-248)

Chromatin Immunoprecipitation Sequencing (ChIP-Seq) for Transcription Factors and Chromatin Factors in Arabidopsis thaliana Roots: From Material Collection to Data Analysis.


Cortijo S, Charoensawan V, Roudier F, Wigge PA (Methods Mol Biol. 2018;1761:231-248)
Chromatin immunoprecipitation combined with next-generation sequencing (ChIP-seq) is a powerful technique to investigate in vivo transcription factor (TF) binding to DNA, as well as chromatin marks. Here we provide a detailed protocol for all the key steps to perform ChIP-seq in Arabidopsis thaliana roots, also working on other A. thaliana tissues and in most non-ligneous plants. We detail all ste......
PubMed:29525962
[4] Detection of E2F-DNA Complexes Using Chromatin Immunoprecipitation Assays.  (Methods Mol Biol. 2018;1726:143-151)

Detection of E2F-DNA Complexes Using Chromatin Immunoprecipitation Assays.


Lee M, Gudas LJ, Saavedra HI (Methods Mol Biol. 2018;1726:143-151)
Chromatin immunoprecipitation (ChIP), originally developed by John T. Lis and David Gilmour in 1984, has been useful to detect DNA sequences where protein(s) of interest bind. ChIP is comprised of several steps: (1) cross-linking of proteins to target DNA sequences, (2) breaking genomic DNA into 300-1000 bp pieces by sonication or nuclease digestion, (3) immunoprecipitation of protein bound to ta......
PubMed:29468550
[5] GOPHER: Generator Of Probes for capture Hi-C Experiments at high Resolution.  (BMC Genomics. 2019 Jan 14;20(1):40)

GOPHER: Generator Of Probes for capture Hi-C Experiments at high Resolution.


Hansen P, Ali S, Blau H, Danis D, Hecht J, Kornak U, Lupiáñez DG, Mundlos S, Steinhaus R, Robinson PN (BMC Genomics. 2019 Jan 14;20(1):40)
BACKGROUND: Target enrichment combined with chromosome conformation capturing methodologies such as capture Hi-C (CHC) can be used to investigate spatial layouts of genomic regions with high resolution and at scalable costs. A common application of CHC is the investigation of regulatory elements that are in contact with promoters, but CHC can be used for a range of other applications. Therefore, p......
PubMed:30642251