8B9J

Cryo-EM structure of MLE in complex with ADP:AlF4


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.45 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 RNA-induced autoregulation of the DExH-type RNA helicase maleless.

Jagtap, P.K.A.Muller, M.Kiss, A.E.Thomae, A.W.Lapouge, K.Beck, M.Becker, P.B.Hennig, J.

(2023) Mol Cell 83: 4318-4333.e10

  • DOI: https://doi.org/10.1016/j.molcel.2023.10.026
  • Primary Citation of Related Structures:  
    8B9G, 8B9I, 8B9J, 8B9K, 8B9L, 8PJB, 8PJJ

  • PubMed Abstract: 

    RNA unwinding by DExH-type helicases underlies most RNA metabolism and function. It remains unresolved if and how the basic unwinding reaction of helicases is regulated by auxiliary domains. We explored the interplay between the RecA and auxiliary domains of the RNA helicase maleless (MLE) from Drosophila using structural and functional studies. We discovered that MLE exists in a dsRNA-bound open conformation and that the auxiliary dsRBD2 domain aligns the substrate RNA with the accessible helicase tunnel. In an ATP-dependent manner, dsRBD2 associates with the helicase module, leading to tunnel closure around ssRNA. Furthermore, our structures provide a rationale for blunt-ended dsRNA unwinding and 3'-5' translocation by MLE. Structure-based MLE mutations confirm the functional relevance of our model for RNA unwinding. Our findings contribute to our understanding of the fundamental mechanics of auxiliary domains in DExH helicase MLE, which serves as a model for its human ortholog and potential therapeutic target, DHX9/RHA.


  • Organizational Affiliation

    Structural and Computational Biology Unit, EMBL Heidelberg, Meyerhofstraße 1, 69117 Heidelberg, Germany; Chair of Biochemistry IV, Biophysical Chemistry, University of Bayreuth, Bayreuth, Germany. Electronic address: pravin.jagtap@embl.de.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dosage compensation regulator1,159Drosophila melanogasterMutation(s): 0 
Gene Names: mlenapCG11680
EC: 3.6.4.13
UniProt
Find proteins for P24785 (Drosophila melanogaster)
Explore P24785 
Go to UniProtKB:  P24785
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP24785
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.45 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
EIPOD fellowship under Marie Sklodowska-Curie Actions COFUNDGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2023-10-18
    Type: Initial release
  • Version 1.1: 2024-05-01
    Changes: Database references