U6 small nuclear RNA 1 (RNU6-1)

U6 small nuclear RNA 1 (RNU6-1) is a non-coding RNA that forms a catalytic core component of the spliceosome, the molecular machine responsible for the removal of introns from pre-messenger RNA (pre-mRNA) in eukaryotic cells[2][3]. U6 snRNA is highly conserved across species, reflecting its essential role in gene expression and cell viability[2][3][4]. It is transcribed by RNA polymerase III and, in humans, is approximately 107 nucleotides long[5][7]. U6 snRNA undergoes complex biogenesis and structural rearrangements to interact with multiple spliceosomal proteins and other small nuclear RNAs (such as U4 and U2), coordinating the two-step splicing chemistry necessary for intron excision[2][3]. While U6 RNA has been employed as an internal control in molecular assays (such as RT-qPCR), recent studies indicate its expression can be highly variable between tissues and disease states, questioning its suitability as a normalization reference[1]. U6 does not function as a drug target, enzyme, receptor, or transporter, but its proper biogenesis and function are critical for normal RNA processing and, by extension, normal cellular function[2][6].

Other names

RNU6AU6U6-1RNU6RNA, U6A small nuclear