RNA, U4 small nuclear 87, pseudogene (RNU4-87P)

RNU4-87P, or "RNA, U4 small nuclear 87, pseudogene," is a **non-protein-coding pseudogene** belonging to the U4 small nuclear RNA (snRNA) family[7][5]. Pseudogenes are typically genomic DNA sequences similar to normal genes but non-functional; they may arise from gene duplication or retrotransposition but lack regulatory elements for proper expression or contain mutations preventing functionality. Unlike the functional U4 snRNA genes—such as RNU4-2, which is a critical component of the spliceosome and is associated with certain neurodevelopmental disorders—RNU4-87P does not appear to participate in RNA splicing or any other known cellular process. There is no evidence linking RNU4-87P to any disease, drug targets, or biomarker roles. **Key Context:** - This entry is for a pseudogene, which, unlike functional small nuclear RNAs (such as RNU4-2), does not encode an active RNA component of the spliceosome and is not implicated in disorders or targeted in therapy[7][5]. - No biological activity, clinical significance, or therapeutic relevance has been established for RNU4-87P in the current scientific literature or gene databases. **Relevant databases supporting this classification include GeneCards and gene family resources[7][5].**