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- PDB-7eld: Cryo-EM structure of Arabidopsis DCL1 in complex with pri-miRNA 166f -
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Open data
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Basic information
Entry | Database: PDB / ID: 7eld | ||||||
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Title | Cryo-EM structure of Arabidopsis DCL1 in complex with pri-miRNA 166f | ||||||
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![]() | HYDROLASE / MicroRNA / miRNA / Endonuclease / Helicase / Nuclease / RNA-binding | ||||||
Function / homology | ![]() ta-siRNA processing / ribonuclease III activity / siRNA processing / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / helicase activity / rRNA processing / double-stranded RNA binding / DNA binding / RNA binding / ATP binding ...ta-siRNA processing / ribonuclease III activity / siRNA processing / Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters / helicase activity / rRNA processing / double-stranded RNA binding / DNA binding / RNA binding / ATP binding / nucleus / metal ion binding / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å | ||||||
![]() | Wei, X. / Ke, H. / Feng, Y. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of microRNA processing by Dicer-like 1. Authors: Xiaobin Wei / Huanhuan Ke / Aijia Wen / Bo Gao / Jing Shi / Yu Feng / ![]() Abstract: MicroRNAs (miRNAs) are short non-coding RNAs that inhibit the expression of target genes by directly binding to their mRNAs. In animals, pri-miRNAs are cleaved by Drosha to generate pre-miRNAs, which ...MicroRNAs (miRNAs) are short non-coding RNAs that inhibit the expression of target genes by directly binding to their mRNAs. In animals, pri-miRNAs are cleaved by Drosha to generate pre-miRNAs, which are subsequently cleaved by Dicer to generate mature miRNAs. Instead of being cleaved by two different enzymes, both cleavages in plants are performed by Dicer-like 1 (DCL1). With a similar domain architecture as human Dicer, it is mysterious how DCL1 recognizes pri-miRNAs and performs two cleavages sequentially. Here, we report the single-particle cryo-electron microscopy structures of Arabidopsis DCL1 complexed with a pri-miRNA and a pre-miRNA, respectively, in cleavage-competent states. These structures uncover the plasticity of the PAZ domain, which is critical for the recognition of both pri-miRNA and pre-miRNA. These structures suggest that the helicase module serves as an engine that transfers the substrate between two sequential cleavage events. This study lays a foundation for dissecting the regulation mechanism of miRNA biogenesis in plants and provides insights into the dicing state of human Dicer. | ||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 281.7 KB | Display | ![]() |
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PDB format | ![]() | 207.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 31181MC ![]() 7eleC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 213859.344 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() References: UniProt: Q9SP32, Hydrolases; Acting on ester bonds; Endoribonucleases producing 5'-phosphomonoesters |
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#2: RNA chain | Mass: 47200.773 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
-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: Binary complex of DCL1 in complex with pri-miRNA 166f / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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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 |
Image recording | Electron dose: 64 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 653929 / Symmetry type: POINT |