8FN4

Cryo-EM structure of RNase-treated RESC-A in trypanosomal RNA editing


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural basis of gRNA stabilization and mRNA recognition in trypanosomal RNA editing.

Liu, S.Wang, H.Li, X.Zhang, F.Lee, J.K.J.Li, Z.Yu, C.Hu, J.J.Zhao, X.Suematsu, T.Alvarez-Cabrera, A.L.Liu, Q.Zhang, L.Huang, L.Aphasizheva, I.Aphasizhev, R.Zhou, Z.H.

(2023) Science 381: eadg4725-eadg4725

  • DOI: https://doi.org/10.1126/science.adg4725
  • Primary Citation of Related Structures:  
    8FN4, 8FN6, 8FNC, 8FNF, 8FNI, 8FNK

  • PubMed Abstract: 

    In Trypanosoma brucei , the editosome, composed of RNA-editing substrate-binding complex (RESC) and RNA-editing catalytic complex (RECC), orchestrates guide RNA (gRNA)-programmed editing to recode cryptic mitochondrial transcripts into messenger RNAs (mRNAs). The mechanism of information transfer from gRNA to mRNA is unclear owing to a lack of high-resolution structures for these complexes. With cryo-electron microscopy and functional studies, we have captured gRNA-stabilizing RESC-A and gRNA-mRNA-binding RESC-B and RESC-C particles. RESC-A sequesters gRNA termini, thus promoting hairpin formation and blocking mRNA access. The conversion of RESC-A into RESC-B or -C unfolds gRNA and allows mRNA selection. The ensuing gRNA-mRNA duplex protrudes from RESC-B, likely exposing editing sites to RECC-catalyzed cleavage, uridine insertion or deletion, and ligation. Our work reveals a remodeling event facilitating gRNA-mRNA hybridization and assembly of a macromolecular substrate for the editosome's catalytic modality.


  • Organizational Affiliation

    Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, CA, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 1 (RESC1)A [auth 1]473Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q57XL7 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
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Go to UniProtKB:  Q57XL7
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UniProt GroupQ57XL7
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 2 (RESC2)B [auth 2]492Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q586X1 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
Explore Q586X1 
Go to UniProtKB:  Q586X1
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UniProt GroupQ586X1
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 3 (RESC3)C [auth 3]482Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q381A0 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
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UniProt GroupQ381A0
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 4 (RESC4)D [auth 4]1,087Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q384R6 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
Explore Q384R6 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 5 (RESC5)E [auth 5]402Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q389F5 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
Explore Q389F5 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
RNA-editing substrate-binding complex protein 6 (RESC6)F [auth 6]516Trypanosoma bruceiMutation(s): 0 
UniProt
Find proteins for Q57ZX7 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
Explore Q57ZX7 
Go to UniProtKB:  Q57ZX7
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UniProt GroupQ57ZX7
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesRO1AI101057
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI152408
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM071940

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-19
    Type: Initial release
  • Version 1.1: 2024-06-19
    Changes: Data collection