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Open data
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Basic information
Entry | Database: PDB / ID: 8b9g | ||||||
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Title | Cryo-EM structure of MLE in complex with ADP:AlF4 and U10 RNA | ||||||
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![]() | RNA BINDING PROTEIN / RNA Helicase / Drosophila dosage compensation | ||||||
Function / homology | ![]() RIP-mediated NFkB activation via ZBP1 / X chromosome located dosage compensation complex, transcription activating / dosage compensation complex assembly / 3'-5' DNA/RNA helicase activity / DEx/H-box helicases activate type I IFN and inflammatory cytokines production / male courtship behavior, veined wing generated song production / regulation of cytoplasmic translation / regulatory region RNA binding / PKR-mediated signaling / MSL complex ...RIP-mediated NFkB activation via ZBP1 / X chromosome located dosage compensation complex, transcription activating / dosage compensation complex assembly / 3'-5' DNA/RNA helicase activity / DEx/H-box helicases activate type I IFN and inflammatory cytokines production / male courtship behavior, veined wing generated song production / regulation of cytoplasmic translation / regulatory region RNA binding / PKR-mediated signaling / MSL complex / dosage compensation by hyperactivation of X chromosome / positive regulation of DNA topoisomerase (ATP-hydrolyzing) activity / sex-chromosome dosage compensation / 3'-5' RNA helicase activity / regulation of mRNA processing / axon extension / lncRNA binding / DNA duplex unwinding / 3'-5' DNA helicase activity / nuclear chromosome / positive regulation of heterochromatin formation / X chromosome / DNA helicase activity / helicase activity / determination of adult lifespan / double-stranded RNA binding / chromosome / double-stranded DNA binding / RNA helicase activity / RNA helicase / ribonucleoprotein complex / chromatin binding / chromatin / nucleolus / positive regulation of transcription by RNA polymerase II / ATP hydrolysis activity / RNA binding / ATP binding / nucleus / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.86 Å | ||||||
![]() | Jagtap, P.K.A. / Hennig, J. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of RNA-induced autoregulation of the DExH-type RNA helicase maleless. Authors: Pravin Kumar Ankush Jagtap / Marisa Müller / Anna E Kiss / Andreas W Thomae / Karine Lapouge / Martin Beck / Peter B Becker / Janosch Hennig / ![]() 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 ...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. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 252.5 KB | Display | ![]() |
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PDB format | ![]() | 189.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 15931MC ![]() 8b9iC ![]() 8b9jC ![]() 8b9kC ![]() 8b9lC ![]() 8pjbC ![]() 8pjjC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Components
#1: Protein | Mass: 130465.070 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#2: RNA chain | Mass: 3016.700 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
#3: Chemical | ChemComp-ADP / |
#4: Chemical | ChemComp-ALF / |
#5: Water | ChemComp-HOH / |
Has ligand of interest | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: MLE in complex with ADP:AlF4 and U10 RNA / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT |
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Molecular weight | Value: 0.133200 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 Details: 20 mM Tris pH 7.5, 50 mM NaCl, 1mM DTT, 1mM ADP, 1mM AlF3, 10 mM NaF, 2mM MgCl2, 0.5% glycerol, 0.005% Triton X-100 |
Specimen | Conc.: 0.612 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/1 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 279.15 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Alignment procedure: ZEMLIN TABLEAU |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 61.2 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
EM software | Name: SerialEM / Version: 4.0.9 / Category: image acquisition |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
3D reconstruction | Resolution: 2.86 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 559766 / Symmetry type: POINT |