| 1 | 6RXV|1|C1+ 6RXV|1|C2 (rep) | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S ribosomal RNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Kre33-Noc4) from Chaetomium thermophilum, state B2 | Electron microscopy | 4 | 1805 | 2019-08-14 |
| 2 | 5OQL|1|1+ 5OQL|1|2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S rRNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome from Chaetomium thermophilum | Electron microscopy | 3.2 | 1580 | 2017-10-11 |
| 3 | 6RXZ|1|C1+ 6RXZ|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S ribosomal RNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Kre33-Noc4) from Chaetomium thermophilum, state b | Electron microscopy | 4.4 | 1717 | 2019-08-14 |
| 4 | 6RXY|1|C1+ 6RXY|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S rRNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Kre33-Noc4) from Chaetomium thermophilum, state a | Electron microscopy | 4.7 | 1336 | 2019-08-14 |
| 5 | 6RXU|1|C1+ 6RXU|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S rRNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Kre33-Noc4) from Chaetomium thermophilum, state B1 | Electron microscopy | 3.5 | 1805 | 2019-08-14 |
| 6 | 6RXT|1|C1+ 6RXT|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S ribosomal RNA, U3 snoRNA | Chaetomium thermophilum | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Kre33-Noc4) from Chaetomium thermophilum, state A | Electron microscopy | 7 | 1382 | 2019-08-14 |
| 7 | 9XAG|1|C1+ 9XAG|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35s rna, u3 rna | Thermochaetoides thermophila | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Enp1-Rrp12 Mut) from Chaetomium thermophilum, state B1 | Electron microscopy | 2.8 | 1803 | 2026-06-24 |
| 8 | 9XA8|1|C1+ 9XA8|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S rRNA, U3 snoRNA | Thermochaetoides thermophila | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Enp1-Rrp12 WT) from Chaetomium thermophilum, state B1 | Electron microscopy | 2.9 | 1816 | 2026-06-24 |
| 9 | 9XAH|1|C1+ 9XAH|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35s rna, u3 rna | Thermochaetoides thermophila | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Enp1-Rrp12 Mut) from Chaetomium thermophilum, state B1* | Electron microscopy | 3.1 | 1803 | 2026-06-24 |
| 10 | 9XAF|1|C1+ 9XAF|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35s rna, u3 rna | Thermochaetoides thermophila | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Enp1-Rrp12 Mut) from Chaetomium thermophilum, state a | Electron microscopy | 3 | 1418 | 2026-06-24 |
| 11 | 9XA7|1|C1+ 9XA7|1|C2 | Small subunit ribosomal RNA + U3 small nucleolar RNA | 35S rRNA, U3 snoRNA | Thermochaetoides thermophila | Eukarya | RF01960 + RF01846 | Cryo-EM structure of the 90S pre-ribosome (Enp1-Rrp12 WT) from Chaetomium thermophilum, state A | Electron microscopy | 3.2 | 1418 | 2026-06-24 |