Jiao and Liu (Research Articles, 16 October 2015, aac4383) reported the crystal structure of the protein complex polycomb repressive complex 2 from Chaetomium thermophilum This landmark structure has brought invaluable insights into the activation mechanism of this essential methyltransferase. However, the analysis of the x-ray data discussed below suggests that the description of oncogenic H3K27M peptide binding to the active site is incorrect.
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http://dx.doi.org/10.1126/science.aaf6236 | DOI Listing |
Oncol Res
January 2025
LICIFO, Department of Restorative Sciences, Faculty of Dentistry, University of Costa Rica (HNSCC), San José, 11501, Costa Rica.
The B lymphoma Mo-MLV insertion region 1 homolog (Bmi-1) protein of the polycomb complex is an essential mediator of the epigenetic transcriptional silencing by the chromatin structure. It has been reported to be crucial for homeostasis of the stem cells and tumorigenesis. Though years of investigation have clarified Bmi-1's transcriptional regulation, post-translational modifications, and functions in controlling cellular bioenergetics, pathologies, and DNA damage response, the full potential of this protein with so many diverse roles are still unfulfilled.
View Article and Find Full Text PDFIntroduction: This study designed to examine whether social/ environmental experiences can induce the epigenetic modification, and influence the associated physiology and behaviour. To test this, we have used social stress [prenatal stress (PNS)] model and then housed at environmental enrichment (EE) condition to evaluate the interaction between specific epigenetic modification and its influence on behaviour.
Methods: Pregnant rats were randomly divided into a control group, PNS group, and PNS+EE group.
Regen Ther
March 2025
Division of Developmental Biology, Center for Stem Cell & Organoid Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, USA.
The generation of induced pluripotent stem cells (iPSCs) from differentiated somatic cells by Yamanaka factors, including pioneer transcription factors (TFs), has greatly reshaped our traditional understanding of cell plasticity and demonstrated the remarkable potential of pioneer TFs. In addition to iPSC reprogramming, pioneer TFs are pivotal in direct reprogramming or transdifferentiation where somatic cells are converted into different cell types without passing through a pluripotent state. Pioneer TFs initiate a reprogramming process through chromatin opening, thereby establishing competence for new gene regulatory programs.
View Article and Find Full Text PDFPolycomb Repressive Complex 1 (PRC1) is a family of epigenetic regulators critical for mammalian development. Elucidating PRC1 composition and function across cell types and developmental stages is key to understanding the epigenetic regulation of cell fate determination. In this study, we discovered POGZ, a prominent Autism Spectrum Disorder (ASD) risk factor, as a novel component of PRC1.
View Article and Find Full Text PDFMol Biol Rep
January 2025
Thalassemia & Hemoglobinopathy Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Introduction: Hematologic malignancies, originating from uncontrolled growth of hematopoietic and lymphoid tissues, constitute 6.5% of all cancers worldwide. Various risk factors including genetic disorders and single nucleotide polymorphisms play a role in the pathogenesis of hematologic malignancies.
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