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-Structure paper
Title | Gene- and Species-Specific Hox mRNA Translation by Ribosome Expansion Segments. |
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Journal, issue, pages | Mol Cell, Vol. 80, Issue 6, Page 980-995.e13, Year 2020 |
Publish date | Dec 17, 2020 |
Authors | Kathrin Leppek / Kotaro Fujii / Nick Quade / Teodorus Theo Susanto / Daniel Boehringer / Tea Lenarčič / Shifeng Xue / Naomi R Genuth / Nenad Ban / Maria Barna / |
PubMed Abstract | Ribosomes have been suggested to directly control gene regulation, but regulatory roles for ribosomal RNA (rRNA) remain largely unexplored. Expansion segments (ESs) consist of multitudes of tentacle- ...Ribosomes have been suggested to directly control gene regulation, but regulatory roles for ribosomal RNA (rRNA) remain largely unexplored. Expansion segments (ESs) consist of multitudes of tentacle-like rRNA structures extending from the core ribosome in eukaryotes. ESs are remarkably variable in sequence and size across eukaryotic evolution with largely unknown functions. In characterizing ribosome binding to a regulatory element within a Homeobox (Hox) 5' UTR, we identify a modular stem-loop within this element that binds to a single ES, ES9S. Engineering chimeric, "humanized" yeast ribosomes for ES9S reveals that an evolutionary change in the sequence of ES9S endows species-specific binding of Hoxa9 mRNA to the ribosome. Genome editing to site-specifically disrupt the Hoxa9-ES9S interaction demonstrates the functional importance for such selective mRNA-rRNA binding in translation control. Together, these studies unravel unexpected gene regulation directly mediated by rRNA and how ribosome evolution drives translation of critical developmental regulators. |
External links | Mol Cell / PubMed:33202249 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.1 - 4.4 Å |
Structure data | EMDB-11562: EMDB-11563: EMDB-11564: EMDB-11565: EMDB-11566: EMDB-11567: EMDB-11568: |
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