U3 snRNP

Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-6754-9_17680

Most abundant of the U RNA (≈106 molecules/cell) processes near the 5′ end of the ribosomal RNA transcripts. It stays on and generates a 5′ knob characteristic of rRNA only. Binding U3 of the snRNP initiates processing, especially the transcripts of 18S rRNA.  rRNA,  snRNP,  ribosome; Venema J et al 2000 RNA 6:1660.

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