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| </table> | | </table> |
| == Function == | | == Function == |
| [https://www.uniprot.org/uniprot/RT02_MOUSE RT02_MOUSE] Required for mitoribosome formation and stability, and mitochondrial translation.[UniProtKB:Q9Y399] | | [https://www.uniprot.org/uniprot/RT35_MOUSE RT35_MOUSE] |
| <div style="background-color:#fffaf0;">
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| == Publication Abstract from PubMed ==
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| Mitoribosomes are essential for the synthesis and maintenance of bioenergetic proteins. Here we use cryo-electron microscopy to determine a series of the small mitoribosomal subunit (SSU) intermediates in complex with auxiliary factors, revealing a sequential assembly mechanism. The methyltransferase TFB1M binds to partially unfolded rRNA h45 that is promoted by RBFA, while the mRNA channel is blocked. This enables binding of METTL15 that promotes further rRNA maturation and a large conformational change of RBFA. The new conformation allows initiation factor mtIF3 to already occupy the subunit interface during the assembly. Finally, the mitochondria-specific ribosomal protein mS37 (ref. (1)) outcompetes RBFA to complete the assembly with the SSU-mS37-mtIF3 complex(2) that proceeds towards mtIF2 binding and translation initiation. Our results explain how the action of step-specific factors modulate the dynamic assembly of the SSU, and adaptation of a unique protein, mS37, links the assembly to initiation to establish the catalytic human mitoribosome.
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| Mechanism of mitoribosomal small subunit biogenesis and preinitiation.,Itoh Y, Khawaja A, Laptev I, Cipullo M, Atanassov I, Sergiev P, Rorbach J, Amunts A Nature. 2022 Jun;606(7914):603-608. doi: 10.1038/s41586-022-04795-x. Epub 2022 , Jun 8. PMID:35676484<ref>PMID:35676484</ref>
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| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| </div>
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| <div class="pdbe-citations 7pnu" style="background-color:#fffaf0;"></div>
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| ==See Also== | | ==See Also== |
| *[[Ribosome 3D structures|Ribosome 3D structures]] | | *[[Ribosome 3D structures|Ribosome 3D structures]] |
| == References ==
| | *[[Serpin 3D structures|Serpin 3D structures]] |
| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
