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. 2022 Jun 9;19(1):781–810. doi: 10.1080/15476286.2022.2079890

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© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 3. — rRNA folding steps shaping the evolving 90S/pre-40S and pre-60S particles. 18S (A) or 5.8S, 25S, and 5S (B) (pre-) rRNA domains are colour coded and the consecutive RNA shaping events illustrated schematically (left panels) or using existing cryo-EM structures of ribosomal maturation intermediates (right (A) and middle panels (B)). Association/dissociation of RNA helicases at distinct pre-60S maturation stages is indicated using the colour codes of their potential rRNA target domains ((B), right panel). PDB codes for 90S/pre-40S structures (A) (from top to bottom): 6ZQA (state A), 6ZQB (state B), 6ZQC (state C/pre-A1), 6LQS (state D/post-A1), 6ZQE (state Dis-A), 6ZQG (state Dis-C), 4v88 (mature 40S). PDB codes for pre-60S structures (B) (from top to bottom): 6EM3 (state A), 6EM4 (state B), 6EM1 (state C), 6ELZ (state D/E), 6YLX (state NE – Nop53 early), 3JCT (state Nog2/F), 6YLG (state LN/Rix1-Rea1), 4v88 (mature 60S).