6QK7 image
Entry Detail
PDB ID:
6QK7
EMDB ID:
Keywords:
Title:
Elongator catalytic subcomplex Elp123 lobe
Biological Source:
PDB Version:
Deposition Date:
2019-01-28
Release Date:
2019-07-17
Method Details:
Experimental Method:
Resolution:
3.30 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Elongator complex protein 1
Chain IDs:A, D
Chain Length:1349
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Elongator complex protein 2
Chain IDs:B
Chain Length:788
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Polymer Type:polypeptide(L)
Description:Elongator complex protein 3
Chain IDs:C
Chain Length:557
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
Primary Citation
Molecular basis of tRNA recognition by the Elongator complex.
Sci Adv 5 eaaw2326 eaaw2326 (2019)
PMID: 31309145 DOI: 10.1126/sciadv.aaw2326

Abstact

The highly conserved Elongator complex modifies transfer RNAs (tRNAs) in their wobble base position, thereby regulating protein synthesis and ensuring proteome stability. The precise mechanisms of tRNA recognition and its modification reaction remain elusive. Here, we show cryo-electron microscopy structures of the catalytic subcomplex of Elongator and its tRNA-bound state at resolutions of 3.3 and 4.4 Å. The structures resolve details of the catalytic site, including the substrate tRNA, the iron-sulfur cluster, and a SAM molecule, which are all validated by mutational analyses in vitro and in vivo. tRNA binding induces conformational rearrangements, which precisely position the targeted anticodon base in the active site. Our results provide the molecular basis for substrate recognition of Elongator, essential to understand its cellular function and role in neurodegenerative diseases and cancer.

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Primary Citation of related structures