7OIC
Cryo-EM structure of late human 39S mitoribosome assembly intermediates, state 4
This is a non-PDB format compatible entry.
Summary for 7OIC
| Entry DOI | 10.2210/pdb7oic/pdb |
| EMDB information | 12925 |
| Descriptor | 16S rRNA, 39S ribosomal protein L14, mitochondrial, 39S ribosomal protein L15, mitochondrial, ... (63 entities in total) |
| Functional Keywords | 39s mitoribosome, ribosome biogenesis, ribosome |
| Biological source | Homo sapiens More |
| Total number of polymer chains | 57 |
| Total formula weight | 1882771.39 |
| Authors | Cheng, J.,Berninghausen, O.,Beckmann, R. (deposition date: 2021-05-11, release date: 2021-09-15, Last modification date: 2021-10-13) |
| Primary citation | Cheng, J.,Berninghausen, O.,Beckmann, R. A distinct assembly pathway of the human 39S late pre-mitoribosome. Nat Commun, 12:4544-4544, 2021 Cited by PubMed Abstract: Assembly of the mitoribosome is largely enigmatic and involves numerous assembly factors. Little is known about their function and the architectural transitions of the pre-ribosomal intermediates. Here, we solve cryo-EM structures of the human 39S large subunit pre-ribosomes, representing five distinct late states. Besides the MALSU1 complex used as bait for affinity purification, we identify several assembly factors, including the DDX28 helicase, MRM3, GTPBP10 and the NSUN4-mTERF4 complex, all of which keep the 16S rRNA in immature conformations. The late transitions mainly involve rRNA domains IV and V, which form the central protuberance, the intersubunit side and the peptidyltransferase center of the 39S subunit. Unexpectedly, we find deacylated tRNA in the ribosomal E-site, suggesting a role in 39S assembly. Taken together, our study provides an architectural inventory of the distinct late assembly phase of the human 39S mitoribosome. PubMed: 34315873DOI: 10.1038/s41467-021-24818-x PDB entries with the same primary citation |
| Experimental method | ELECTRON MICROSCOPY (3.1 Å) |
Structure validation
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