H3 histone pseudogene 18 (H3P18)

H3 histone pseudogene 18 (H3P18) is a **pseudogene**—a gene sequence that resembles the gene for a canonical or variant H3 family histone, specifically the H3.3B variant, but lacks the necessary elements to produce a functional protein. In contrast to coding members of the H3 family—which play critical roles in nucleosome structure, chromatin dynamics, and epigenetic regulation—H3P18 does not encode a protein and therefore does not have a known physiological function or implications as a drug target[1][2]. The designation as a pseudogene implies it arose from gene duplication or retrotransposition events, but acquired mutations that inactivate protein production. There is no evidence in the scientific literature that H3P18 has a role in human disease, nor is it a pharmacological target or biomarker. **Context and Supporting Details:** - **Histone H3** is a central nucleosome component and subject to extensive post-translational modification, and active variants including H3.3 are involved in transcription regulation and chromatin dynamics[1][2]. - A pseudogene such as H3P18 is a nonfunctional remnant, sharing sequence similarity but not producing protein; such entities are not considered canonical molecular targets for drug development, diagnostics, or research into biochemical pathways. - No drugs, biomarkers, disease associations, or distinct molecular functions are reported for H3P18[1][2]. - H3mm18, a mouse-specific H3.3-like variant, is sometimes discussed in the context of variant function, but is distinct from pseudogenes and not directly related to the human H3P18 pseudogene[1]. **Summary:** **H3 histone pseudogene 18** is not a functional molecular target. It is a non-coding pseudogene, not associated with a physiological or pathological role, and should not be considered as a valid or actionable therapeutic target.

Other names

H3 histone, family 3B (H3.3B) pseudogeneH3P18