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- EMDB-16349: Enp1TAP_A population of yeast small ribosomal subunit precursors,... -
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Open data
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Basic information
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Title | Enp1TAP_A population of yeast small ribosomal subunit precursors, multibody refinement | |||||||||
![]() | Enp1TAP_A Multibody Refinement | |||||||||
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![]() | ribosomal assembly state / RIBOSOME | |||||||||
Function / homology | ![]() : / positive regulation of RNA import into nucleus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Negative regulators of DDX58/IFIH1 signaling / rRNA primary transcript binding / positive regulation of translational fidelity / Protein methylation / RMTs methylate histone arginines / mTORC1-mediated signalling ...: / positive regulation of RNA import into nucleus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / Negative regulators of DDX58/IFIH1 signaling / rRNA primary transcript binding / positive regulation of translational fidelity / Protein methylation / RMTs methylate histone arginines / mTORC1-mediated signalling / Protein hydroxylation / U3 snoRNA binding / positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / poly(A)+ mRNA export from nucleus / preribosome, small subunit precursor / snoRNA binding / Major pathway of rRNA processing in the nucleolus and cytosol / SRP-dependent cotranslational protein targeting to membrane / GTP hydrolysis and joining of the 60S ribosomal subunit / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / L13a-mediated translational silencing of Ceruloplasmin expression / proteasome assembly / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / regulation of translational fidelity / Ub-specific processing proteases / ribosomal subunit export from nucleus / ribonucleoprotein complex binding / ribosomal small subunit export from nucleus / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / RNA endonuclease activity / ribosome assembly / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / maintenance of translational fidelity / cytoplasmic stress granule / rRNA processing / unfolded protein binding / ribosome biogenesis / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytoplasmic translation / Hydrolases; Acting on ester bonds / rRNA binding / non-specific serine/threonine protein kinase / ribosome / protein kinase activity / structural constituent of ribosome / translation / protein serine kinase activity / protein serine/threonine kinase activity / GTPase activity / mRNA binding / nucleolus / GTP binding / endoplasmic reticulum / mitochondrion / RNA binding / nucleoplasm / ATP binding / nucleus / metal ion binding / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.7 Å | |||||||||
![]() | Milkereit P / Poell G | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Impact of the yeast S0/uS2-cluster ribosomal protein rpS21/eS21 on rRNA folding and the architecture of small ribosomal subunit precursors. Authors: Gisela Pöll / Joachim Griesenbeck / Herbert Tschochner / Philipp Milkereit / ![]() Abstract: RpS0/uS2, rpS2/uS5, and rpS21/eS21 form a cluster of ribosomal proteins (S0-cluster) at the head-body junction near the central pseudoknot of eukaryotic small ribosomal subunits (SSU). Previous work ...RpS0/uS2, rpS2/uS5, and rpS21/eS21 form a cluster of ribosomal proteins (S0-cluster) at the head-body junction near the central pseudoknot of eukaryotic small ribosomal subunits (SSU). Previous work in yeast indicated that S0-cluster assembly is required for the stabilisation and maturation of SSU precursors at specific post-nucleolar stages. Here, we analysed the role of S0-cluster formation for rRNA folding. Structures of SSU precursors isolated from yeast S0-cluster expression mutants or control strains were analysed by cryogenic electron microscopy. The obtained resolution was sufficient to detect individual 2'-O-methyl RNA modifications using an unbiased scoring approach. The data show how S0-cluster formation enables the initial recruitment of the pre-rRNA processing factor Nob1 in yeast. Furthermore, they reveal hierarchical effects on the pre-rRNA folding pathway, including the final maturation of the central pseudoknot. Based on these structural insights we discuss how formation of the S0-cluster determines at this early cytoplasmic assembly checkpoint if SSU precursors further mature or are degraded. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 14.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 47.4 KB 47.4 KB | Display Display | ![]() |
Images | ![]() | 112.6 KB | ||
Filedesc metadata | ![]() | 12 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8c01MC ![]() 8c00C C: citing same article ( M: atomic model generated by this map |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Enp1TAP_A Multibody Refinement | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.968 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Enp1-TAP associated immature ribosomal particles from S. cerevisiae
+Supramolecule #1: Enp1-TAP associated immature ribosomal particles from S. cerevisiae
+Macromolecule #1: 18S rRNA precursor
+Macromolecule #2: 40S ribosomal protein S5
+Macromolecule #3: 40S ribosomal protein S17-A
+Macromolecule #4: 40S ribosomal protein S15
+Macromolecule #5: 40S ribosomal protein S16-A
+Macromolecule #6: 40S ribosomal protein S18-A
+Macromolecule #7: 40S ribosomal protein S19-A
+Macromolecule #8: 40S ribosomal protein S25-A
+Macromolecule #9: 40S ribosomal protein S28-A
+Macromolecule #10: 40S ribosomal protein S0-A
+Macromolecule #11: 40S ribosomal protein S1-A
+Macromolecule #12: 40S ribosomal protein S2
+Macromolecule #13: 40S ribosomal protein S4-A
+Macromolecule #14: 40S ribosomal protein S6-A
+Macromolecule #15: 40S ribosomal protein S7-A
+Macromolecule #16: 40S ribosomal protein S8-A
+Macromolecule #17: 40S ribosomal protein S9-A
+Macromolecule #18: 40S ribosomal protein S11-A
+Macromolecule #19: 40S ribosomal protein S13
+Macromolecule #20: 40S ribosomal protein S14-A
+Macromolecule #21: 40S ribosomal protein S21-A
+Macromolecule #22: 40S ribosomal protein S22-A
+Macromolecule #23: 40S ribosomal protein S23-A
+Macromolecule #24: 40S ribosomal protein S24-A
+Macromolecule #25: Essential nuclear protein 1
+Macromolecule #26: 40S ribosomal protein S27-A
+Macromolecule #27: 40S ribosomal protein S30-A
+Macromolecule #28: 20S-pre-rRNA D-site endonuclease NOB1
+Macromolecule #29: Pre-rRNA-processing protein PNO1
+Macromolecule #30: Serine/threonine-protein kinase RIO2
+Macromolecule #31: Ribosome biogenesis protein TSR1
+Macromolecule #32: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 8 Component:
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Grid | Model: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 200 sec. / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 0.4 kPa | ||||||||
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | JEOL CRYO ARM 200 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 8575 / Average exposure time: 4.4 sec. / Average electron dose: 40.0 e/Å2 |
Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 50000 |
Sample stage | Specimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN |
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Image processing
-Atomic model buiding 1
Refinement | Protocol: FLEXIBLE FIT |
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Output model | ![]() PDB-8c01: |