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Open data
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Basic information
| Entry | Database: PDB / ID: 7c79 | ||||||
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| Title | Cryo-EM structure of yeast Ribonuclease MRP | ||||||
Components |
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Keywords | RNA BINDING PROTEIN / Ribonuclease MRP / RNA-protein complex | ||||||
| Function / homology | Function and homology informationribonuclease MRP activity / nuclear-transcribed mRNA catabolic process, RNase MRP-dependent / intronic box C/D snoRNA processing / nucleolar ribonuclease P complex / ribonuclease MRP complex / ribonuclease P RNA binding / ribonuclease P complex / plasmid partitioning / ribonuclease P / nuclease activity ...ribonuclease MRP activity / nuclear-transcribed mRNA catabolic process, RNase MRP-dependent / intronic box C/D snoRNA processing / nucleolar ribonuclease P complex / ribonuclease MRP complex / ribonuclease P RNA binding / ribonuclease P complex / plasmid partitioning / ribonuclease P / nuclease activity / rRNA primary transcript binding / ribonuclease P activity / tRNA 5'-leader removal / maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / telomerase holoenzyme complex / tRNA processing / maturation of 5.8S rRNA / mRNA processing / rRNA processing / nucleolus / RNA binding / nucleus / membrane / cytoplasm / cytosol Similarity search - Function | ||||||
| Biological species | ![]() ![]() | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å | ||||||
Authors | Lan, P. / Wu, J. / Lei, M. | ||||||
Citation | Journal: Science / Year: 2020Title: Structural insight into precursor ribosomal RNA processing by ribonuclease MRP. Authors: Pengfei Lan / Bin Zhou / Ming Tan / Shaobai Li / Mi Cao / Jian Wu / Ming Lei / ![]() Abstract: Ribonuclease (RNase) MRP is a conserved eukaryotic ribonucleoprotein complex that plays essential roles in precursor ribosomal RNA (pre-rRNA) processing and cell cycle regulation. In contrast to ...Ribonuclease (RNase) MRP is a conserved eukaryotic ribonucleoprotein complex that plays essential roles in precursor ribosomal RNA (pre-rRNA) processing and cell cycle regulation. In contrast to RNase P, which selectively cleaves transfer RNA-like substrates, it has remained a mystery how RNase MRP recognizes its diverse substrates. To address this question, we determined cryo-electron microscopy structures of RNase MRP alone and in complex with a fragment of pre-rRNA. These structures and the results of biochemical studies reveal that coevolution of both protein and RNA subunits has transformed RNase MRP into a distinct ribonuclease that processes single-stranded RNAs by recognizing a short, loosely defined consensus sequence. This broad substrate specificity suggests that RNase MRP may have myriad yet unrecognized substrates that could play important roles in various cellular contexts. | ||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 7c79.cif.gz | 609.8 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb7c79.ent.gz | 486.7 KB | Display | PDB format |
| PDBx/mmJSON format | 7c79.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 7c79_validation.pdf.gz | 925.2 KB | Display | wwPDB validaton report |
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| Full document | 7c79_full_validation.pdf.gz | 968.4 KB | Display | |
| Data in XML | 7c79_validation.xml.gz | 74.5 KB | Display | |
| Data in CIF | 7c79_validation.cif.gz | 116.2 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/c7/7c79 ftp://data.pdbj.org/pub/pdb/validation_reports/c7/7c79 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 30296MC ![]() 7c7aC 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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| 1 |
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Components
-Ribonucleases P/MRP protein subunit ... , 5 types, 5 molecules BCFGH
| #2: Protein | Mass: 100559.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P41812, ribonuclease P |
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| #3: Protein | Mass: 22643.721 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P53833 |
| #6: Protein | Mass: 18234.959 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P53218, ribonuclease P |
| #7: Protein | Mass: 15844.284 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P38291, ribonuclease P |
| #8: Protein | Mass: 15530.351 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P38208, ribonuclease P |
-Ribonuclease P/MRP protein subunit ... , 2 types, 3 molecules EIJ
| #5: Protein | Mass: 19601.590 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P28005, ribonuclease P |
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| #9: Protein | Mass: 32270.262 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P38786, ribonuclease P |
-Ribonuclease MRP protein subunit ... , 2 types, 2 molecules KL
| #10: Protein | Mass: 22578.955 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P40993 |
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| #11: Protein | Mass: 23657.668 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: Q12530 |
-RNA chain / Protein , 2 types, 2 molecules AD
| #1: RNA chain | Mass: 108806.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell / Source: (natural) ![]() |
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| #4: Protein | Mass: 32933.168 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: cell Source: (natural) ![]() Strain: ATCC 204508 / S288c / References: UniProt: P38336 |
-Non-polymers , 2 types, 2 molecules 


| #12: Chemical | ChemComp-MG / |
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| #13: Chemical | ChemComp-ZN / |
-Details
| Has ligand of interest | N |
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-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: Ribonuclease MRP / Type: COMPLEX / Entity ID: #1-#11 / Source: NATURAL |
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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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
| CTF correction | Type: NONE |
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| Symmetry | Point symmetry: C1 (asymmetric) |
| 3D reconstruction | Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 1232761 / Symmetry type: POINT |
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