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- EMDB-30297: Cryo-EM structure of yeast Ribonuclease MRP with substrate ITS1 -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-30297 | |||||||||
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Title | Cryo-EM structure of yeast Ribonuclease MRP with substrate ITS1 | |||||||||
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![]() | Ribonuclease MRP / RNA-protein complex / ![]() | |||||||||
Function / homology | ![]() 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 / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Lan P / Wu J | |||||||||
![]() | ![]() Title: 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. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 287.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 22.3 KB 22.3 KB | Display Display | ![]() |
Images | ![]() | 94.7 KB | ||
Filedesc metadata | ![]() | 7.2 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7c7aMC ![]() 7c79C M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Voxel size | X=Y=Z: 1.1 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : Ribonuclease MRP with substrate ITS1
+Supramolecule #1: Ribonuclease MRP with substrate ITS1
+Macromolecule #1: Ribonuclease MRP RNA subunit NME1
+Macromolecule #12: Internal Transcribed Spacer 1
+Macromolecule #2: Ribonucleases P/MRP protein subunit POP1
+Macromolecule #3: Ribonucleases P/MRP protein subunit POP3
+Macromolecule #4: RNases MRP/P 32.9 kDa subunit
+Macromolecule #5: Ribonuclease P/MRP protein subunit POP5
+Macromolecule #6: Ribonucleases P/MRP protein subunit POP6
+Macromolecule #7: Ribonucleases P/MRP protein subunit POP7
+Macromolecule #8: Ribonucleases P/MRP protein subunit POP8
+Macromolecule #9: Ribonuclease P/MRP protein subunit RPP1
+Macromolecule #10: Ribonuclease MRP protein subunit SNM1
+Macromolecule #11: Ribonuclease MRP protein subunit RMP1
+Macromolecule #13: MAGNESIUM ION
+Macromolecule #14: ZINC ION
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER |
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Initial angle assignment | Type: COMMON LINE |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 1037868 |