H2AC4 Protein, Human

H2AC4 protein serves as a core component of the nucleosome, an integral structure that envelops and compacts DNA into chromatin, effectively restricting DNA accessibility to cellular machineries requiring DNA as a template. Histones, including H2AC4, assume a pivotal role in key cellular processes such as transcription regulation, DNA repair, DNA replication, and the maintenance of chromosomal stability. The intricate regulation of DNA accessibility involves a complex network of post-translational modifications, collectively known as the histone code, and dynamic nucleosome remodeling. The nucleosome itself comprises a histone octamer, consisting of two molecules each of H2A, H2B, H3, and H4, arranged in one H3-H4 heterotetramer and two H2A-H2B heterodimers. This octamer efficiently wraps approximately 147 base pairs of DNA, underscoring its fundamental role in organizing chromatin structure and facilitating genomic functions.