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The "histone code" is comprised of the covalent modifications of histone tails that function to regulate gene transcription. The post-translational modifications that occur in histones within the regulatory regions of genes include acetylation, methylation, phosphorylation, ubiquitination, sumoylation, and ADP-ribosylation. These modifications serve to alter chromatin structure and accessibility, and to act as docking sites for transcription factors or other histone modifying enzymes. Several of the factors that are disrupted by chromosomal translocations associated with hematological malignancies can alter the histone code in a gene-specific manner. Here, we discuss how the histone code may be disrupted by chromosomal translocations, either directly by altering the activity of histone modifying enzymes, or indirectly by recruitment of this type of enzyme by oncogenic transcription factors. These alterations in the histone code may alter gene expression pattern to set the stage for leukemogenesis.
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http://dx.doi.org/10.1002/jcb.20604 | DOI Listing |
J Biol Chem
September 2025
Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan. Electronic address:
Posttranslational modifications (PTMs) of proteins are efficient biological mechanisms for expanding the genetic code and for regulating cellular physiology. However, there have been no systematic approaches to profile all the PTMs critical for autoreactive neoantigen production or the etiology and pathology of autoimmune diseases. In the present study, to gain insight into protein PTMs associated with systemic lupus erythematosus (SLE), we applied a mass spectrometry-based method for the comprehensive analysis of modified amino acids ("adductome").
View Article and Find Full Text PDFFEMS Microbiol Rev
September 2025
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
Histone-like nucleoid structuring protein H-NS plays a pivotal role in orchestrating bacterial chromatin and regulating horizontal gene transfer (HGT) elements. In response to environmental signals, H-NS undergoes dynamic post-translational modifications (PTMs) that resemble the epigenetic codes of eukaryotic histones. This review explores how environmental cues regulate PTMs at specific sites within distinct domains of H-NS, thereby modulating its oligomerization and DNA-binding capabilities to reprogram bacterial responses.
View Article and Find Full Text PDFFront Immunol
September 2025
Institute of Psoriasis, Tongji University School of Medicine, Shanghai, China.
Tissue-resident memory T cells (TRM) represent a heterogeneous population of T cells that exhibit both effector and memory functionalities. They express specific gene signatures that enable them to occupy tissues without recirculating, thus providing a first response against reencountered pathogens or antigens. TRM have been implicated in the pathogenesis of various diseases, including autoimmune disorders, infections, and cancers.
View Article and Find Full Text PDFAnn Hematol
September 2025
Department of Clinical Laboratory, The Affiliated Li Huili Hospital, Ningbo University, 57 Xingning Road, Ningbo, 315000, China.
T-cell lymphoma (TCL) is a prevalent malignancy characterized by the aberrant proliferation of T cells. The molecular mechanism underlying TCL remains poorly understood, and effective therapeutic strategies are still limited. Maprotiline, a highly selective norepinephrine reuptake blocker, is primarily used in the treatment of various types of depression.
View Article and Find Full Text PDFFront Genet
August 2025
4th Department of Internal Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
Transcriptional enhancers are DNA regulatory elements that control the levels and spatiotemporal patterns of gene expression during development, homeostasis, and pathophysiological processes. Enhancer identification and characterization at the genome-wide scale rely on their structural characteristics, such as chromatin accessibility, binding of transcription factors and cofactors, activating histone modifications, 3D interactions with other regulatory elements, as well as functional characteristics measured by massively parallel reporter assays and sequence conservation approaches. Recently, machine learning approaches and particularly deep learning models (Enformer, BPNet, DeepSTARR, etc.
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