RNA, variant U1 small nuclear 4 (RNVU1-4)

RNVU1-4 is a variant gene of the **U1 small nuclear RNA**, located within highly polymorphic segmental duplications on chromosome 1. Like other U1 snRNAs, it encodes a non-coding RNA of approximately 164 nucleotides that forms part of the **U1 small nuclear ribonucleoprotein (snRNP)** complex, essential for the recognition of the 5′ splice site in precursor mRNA during splicing[2][3][4]. The U1 snRNP initiates spliceosome assembly, working in concert with other snRNAs (U2, U4, U5, U6), and its sequence and promoter region exhibit interindividual variation and high copy number polymorphism due to repeated genomic loci[2]. Functional U1 snRNA variants are highly homologous to canonical U1 snRNAs, but assessing their individual functionality is challenging and may require further experimentation[2]. Some variants/mutations in U1 snRNA genes are recurrently observed in cancers and rare diseases, but important disease associations and mechanisms are mostly described for canonical U1 or well-studied variants, not RNVU1-4 specifically[1][2][3]. **Notes on correctness and ambiguity:** The submitted aliases combine distinct variant U1 snRNAs (e.g., "RNVU1-5" and "RNVU1-4," as well as "RNA, variant U1 small nuclear 5") that, while related, have different genomic loci and sequences[2]. This risks misannotation and should be carefully parsed before structured information is derived. The gene is not a 'therapeutic target' like a receptor, enzyme, or transporter[3]. There is no evidence for drug interaction, biomarker, or direct therapeutic relevance for RNVU1-4 alone.

Other names

vU1.4RNU1-102vU1.5RNU1-50RNVU1-5RNA, variant U1 small nuclear 5