Histone H2A.Z variant 1 (H2A.Z.1)

Histone H2A.Z variant 1 (H2A.Z.1) is a replication-independent variant of the canonical histone H2A and is encoded by the *H2AFZ* gene in humans[1]. As a core histone, H2A.Z.1 replaces standard H2A in nucleosomes at specific genomic locations, contributing to the modulation of nucleosome stability and structure. H2A.Z.1 plays critical roles in transcription regulation by influencing nucleosome positioning, DNA accessibility, and higher-order chromatin folding. Unlike canonical H2A, the incorporation of H2A.Z.1 into chromatin can both destabilize nucleosomes (making DNA more accessible for transcriptional machinery) and promote chromatin compaction, with effects that depend on its post-translational modifications and chromatin environment[1][2][3]. It is essential for early embryonic development and cell differentiation; loss of H2A.Z.1 function leads to embryonic lethality in animal models[1][4]. Its aberrant expression is associated with cancer and development-related diseases, but it is not currently a direct therapeutic target due to its broad and vital cellular functions[1][4].

Other names

Histone H2A.ZH2AZ1H2AFZH2AZH2A/zH2A.ZH2A.Z-1H2A.zH2AZ histoneH2A histone family member Z

Not applicable for drugs, as none directly target H2A.Z.1; however, altered function can be achieved indirectly via epigenetic modulators or chromatin remodeling agents that affect H2A.Z deposition or removal from chromatin.