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JGM, Chromatin, CCCTC-Binding Factor, Chromosomes, Cell Nucleus, Cell Cycle Proteins, Gene Expression

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Sci Rep. 2023;13(1):11693







This work has been supported by National Science Centre, Poland (2019/35/O/ST6/02484 and 2020/37/B/ NZ2/03757); The work has been co-supported by Enhpathy—“Molecular Basis of Human enhanceropathies” funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska- Curie grant agreement No 860002 and National Institute of Health USA 4DNucleome grant 1U54DK107967-01 "Nucleome Positioning System for Spatiotemporal Genome Organization and Regulation". Research was co- funded by the Warsaw University of Technology within the Excellence Initiative: Research University (IDUB) programme. Computations were performed thanks to the Laboratory of Bioinformatics and Computational Genomics, Faculty of Mathematics and Information Science, Warsaw University of Technology, using the Arti- ficial Intelligence HPC platform financed by the Polish Ministry of Science and Higher Education (decision no. 7054/IA/SP/2020 of 2020-08-28).


There have been multiple attempts to predict the expression of the genes based on the sequence, epigenetics, and various other factors. To improve those predictions, we have decided to investigate adding protein-specific 3D interactions that play a significant role in the condensation of the chromatin structure in the cell nucleus. To achieve this, we have used the architecture of one of the state-of-the-art algorithms, ExPecto, and investigated the changes in the model metrics upon adding the spatially relevant data. We have used ChIA-PET interactions that are mediated by cohesin (24 cell lines), CTCF (4 cell lines), and RNAPOL2 (4 cell lines). As the output of the study, we have developed the Spatial Gene Expression (SpEx) algorithm that shows statistically significant improvements in most cell lines. We have compared ourselves to the baseline ExPecto model, which obtained a 0.82 Spearman's rank correlation coefficient (SCC) score, and 0.85, which is reported by newer Enformer were able to obtain the average correlation score of 0.83. However, in some cases (e.g. RNAPOL2 on GM12878), our improvement reached 0.04, and in some cases (e.g. RNAPOL2 on H1), we reached an SCC of 0.86.


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