| Chain | GOid | namespace | contents |
| A | 0000447 | biological_process | endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) |
| A | 0000472 | biological_process | endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) |
| A | 0000479 | biological_process | endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) |
| A | 0000480 | biological_process | endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) |
| A | 0003824 | molecular_function | catalytic activity |
| A | 0003963 | molecular_function | RNA-3'-phosphate cyclase activity |
| A | 0004521 | molecular_function | RNA endonuclease activity |
| A | 0005515 | molecular_function | protein binding |
| A | 0005634 | cellular_component | nucleus |
| A | 0005654 | cellular_component | nucleoplasm |
| A | 0005730 | cellular_component | nucleolus |
| A | 0006364 | biological_process | rRNA processing |
| A | 0006396 | biological_process | RNA processing |
| A | 0008047 | molecular_function | enzyme activator activity |
| A | 0030490 | biological_process | maturation of SSU-rRNA |
| A | 0030686 | cellular_component | 90S preribosome |
| A | 0032040 | cellular_component | small-subunit processome |
| A | 0042254 | biological_process | ribosome biogenesis |
| A | 0042274 | biological_process | ribosomal small subunit biogenesis |
| A | 2000232 | biological_process | regulation of rRNA processing |
