- EMDB-0441: Conformational switches control early maturation of the eukaryoti... -
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Basic information
Entry
Database: EMDB / ID: EMD-0441
Title
Conformational switches control early maturation of the eukaryotic small ribosomal subunit
Map data
masked, sharpened map
Sample
Complex: 5' ETS particle
RNA: x 3 types
Protein or peptide: x 25 types
Keywords
Ribosome assembly / RIBOSOME
Function / homology
Function and homology information
RNA fragment catabolic process / rRNA 2'-O-methylation / t-UTP complex / Mpp10 complex / snoRNA guided rRNA 2'-O-methylation / Pwp2p-containing subcomplex of 90S preribosome / rRNA modification / septum digestion after cytokinesis / snRNA binding / tRNA re-export from nucleus ...RNA fragment catabolic process / rRNA 2'-O-methylation / t-UTP complex / Mpp10 complex / snoRNA guided rRNA 2'-O-methylation / Pwp2p-containing subcomplex of 90S preribosome / rRNA modification / septum digestion after cytokinesis / snRNA binding / tRNA re-export from nucleus / box C/D sno(s)RNA 3'-end processing / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / rRNA methyltransferase activity / rDNA heterochromatin / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / regulation of transcription by RNA polymerase I / box C/D methylation guide snoRNP complex / U4/U6 snRNP / positive regulation of rRNA processing / tRNA export from nucleus / sno(s)RNA-containing ribonucleoprotein complex / SUMOylation of RNA binding proteins / protein localization to nucleolus / U4 snRNA binding / O-methyltransferase activity / rRNA methylation / histone H2AQ104 methyltransferase activity / U4 snRNP / U3 snoRNA binding / snoRNA binding / precatalytic spliceosome / preribosome, small subunit precursor / establishment of cell polarity / Major pathway of rRNA processing in the nucleolus and cytosol / positive regulation of transcription by RNA polymerase I / spliceosomal complex assembly / 90S preribosome / 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) / U4/U6 x U5 tri-snRNP complex / RNA endonuclease activity / Transferases; Transferring one-carbon groups; Methyltransferases / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / spliceosomal complex / mRNA splicing, via spliceosome / rRNA processing / peroxisome / ribosomal small subunit biogenesis / ribosomal small subunit assembly / tRNA binding / rRNA binding / mRNA binding / nucleolus / mitochondrion / RNA binding / nucleoplasm / identical protein binding / nucleus / cytoplasm Similarity search - Function
U3 small nucleolar RNA-associated protein 8 / : / Utp8, N-terminal beta propeller / Utp8, C-terminal / U3 snoRNA associated / U3 snoRNA associated / WD repeat-containing protein 75 second beta-propeller / U3 small nucleolar RNA-associated protein 6 / U3 small nucleolar RNA-associated protein 4 / : ...U3 small nucleolar RNA-associated protein 8 / : / Utp8, N-terminal beta propeller / Utp8, C-terminal / U3 snoRNA associated / U3 snoRNA associated / WD repeat-containing protein 75 second beta-propeller / U3 small nucleolar RNA-associated protein 6 / U3 small nucleolar RNA-associated protein 4 / : / U3 small nucleolar RNA-associated protein 6 / Sof1-like protein / BING4, C-terminal domain / rRNA-processing protein Fcf1, PIN domain / WD repeat-containing protein WDR46/Utp7 / : / : / Sof1-like domain / BING4CT (NUC141) domain / BING4CT (NUC141) domain / : / U3 small nucleolar RNA-associated protein 15, C-terminal / UTP15 C terminal / rRNA-processing protein Fcf1/Utp23 / Fcf1 / Nucleolar protein 58/56, N-terminal / U3 small nucleolar RNA-associated protein 18 / NOP5NT (NUC127) domain / : / BP28, C-terminal domain / U3 small nucleolar RNA-associated protein 10, N-terminal / U3 small nucleolar RNA-associated protein 10 / : / BP28CT (NUC211) domain / U3 small nucleolar RNA-associated protein 10 / HEATR1-like, HEAT repeats / BP28CT (NUC211) domain / U3 small nucleolar RNA-associated protein 13, C-terminal / Periodic tryptophan protein 2 / Utp13 specific WD40 associated domain / Small-subunit processome, Utp12 / Dip2/Utp12 Family / Small-subunit processome, Utp21 / U3 small nucleolar ribonucleoprotein complex, subunit Mpp10 / Mpp10 protein / Utp21 specific WD40 associated putative domain / Ribosomal RNA-processing protein Rrp9-like / PRP39 N-terminal HAT repeat / Nucleolar protein Nop56/Nop58 / rRNA 2'-O-methyltransferase fibrillarin-like / Fibrillarin, conserved site / Fibrillarin / Fibrillarin signature. / Fibrillarin / Large family of predicted nucleotide-binding domains / Anaphase-promoting complex subunit 4, WD40 domain / PIN domain / NOSIC / NOSIC (NUC001) domain / Nop domain / Nop domain superfamily / Nop, C-terminal domain / snoRNA binding domain, fibrillarin / Nop domain profile. / H/ACA ribonucleoprotein complex, subunit Nhp2-like / Anaphase-promoting complex subunit 4 WD40 domain / HEAT repeat profile. / HEAT, type 2 / HAT (Half-A-TPR) repeat / HAT (Half-A-TPR) repeats / PIN-like domain superfamily / Quinoprotein alcohol dehydrogenase-like superfamily / Ribosomal protein L7Ae conserved site / Ribosomal protein L7Ae signature. / Ribosomal protein L7Ae/L8/Nhp2 family / : / Ribosomal protein L7Ae/L30e/S12e/Gadd45 / Ribosomal protein L7Ae/L30e/S12e/Gadd45 family / 50S ribosomal protein L30e-like / Armadillo-like helical / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9 N-terminal domain / Ribosomal protein S4/S9, N-terminal / Ribosomal protein S4/S9 / S4 RNA-binding domain profile. / Tetratricopeptide-like helical domain superfamily / S4 RNA-binding domain / S4 domain / RNA-binding S4 domain / RNA-binding S4 domain superfamily / Armadillo-type fold / G-protein beta WD-40 repeat / WD40 repeat, conserved site / Trp-Asp (WD) repeats signature. / WD domain, G-beta repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily Similarity search - Domain/homology
rRNA 2'-O-methyltransferase fibrillarin / Periodic tryptophan protein 2 / U3 small nucleolar ribonucleoprotein protein IMP3 / Protein SOF1 / U3 small nucleolar RNA-associated protein 9 / 13 kDa ribonucleoprotein-associated protein / U3 small nucleolar RNA-associated protein 7 / U3 small nucleolar RNA-associated protein 18 / U3 small nucleolar RNA-associated protein 10 / U3 small nucleolar RNA-associated protein MPP10 ...rRNA 2'-O-methyltransferase fibrillarin / Periodic tryptophan protein 2 / U3 small nucleolar ribonucleoprotein protein IMP3 / Protein SOF1 / U3 small nucleolar RNA-associated protein 9 / 13 kDa ribonucleoprotein-associated protein / U3 small nucleolar RNA-associated protein 7 / U3 small nucleolar RNA-associated protein 18 / U3 small nucleolar RNA-associated protein 10 / U3 small nucleolar RNA-associated protein MPP10 / U3 small nucleolar RNA-associated protein 8 / U3 small nucleolar RNA-associated protein 6 / NET1-associated nuclear protein 1 / U3 small nucleolar RNA-associated protein 5 / U3 small nucleolar RNA-associated protein 15 / rRNA-processing protein FCF1 / U3 small nucleolar RNA-associated protein 13 / U3 small nucleolar RNA-associated protein 21 / Ribosomal RNA-processing protein 9 / U3 small nucleolar RNA-associated protein 4 / U3 small nucleolar RNA-associated protein 16 / U3 small nucleolar RNA-associated protein 12 / Nucleolar protein 56 / Nucleolar protein 58 Similarity search - Component
Biological species
Saccharomyces cerevisiae BY4741 (yeast)
Method
single particle reconstruction / cryo EM / Resolution: 4.3 Å
National Institutes of Health/Office of the Director
1DP2GM123459
United States
Swiss National Science Foundation
155515
Switzerland
Citation
Journal: Elife / Year: 2019 Title: Conformational switches control early maturation of the eukaryotic small ribosomal subunit. Authors: Mirjam Hunziker / Jonas Barandun / Olga Buzovetsky / Caitlin Steckler / Henrik Molina / Sebastian Klinge / Abstract: Eukaryotic ribosome biogenesis is initiated with the transcription of pre-ribosomal RNA at the 5' external transcribed spacer, which directs the early association of assembly factors but is absent ...Eukaryotic ribosome biogenesis is initiated with the transcription of pre-ribosomal RNA at the 5' external transcribed spacer, which directs the early association of assembly factors but is absent from the mature ribosome. The subsequent co-transcriptional association of ribosome assembly factors with pre-ribosomal RNA results in the formation of the small subunit processome. Here we show that stable rRNA domains of the small ribosomal subunit can independently recruit their own biogenesis factors in vivo. The final assembly and compaction of the small subunit processome requires the presence of the 5' external transcribed spacer RNA and all ribosomal RNA domains. Additionally, our cryo-electron microscopy structure of the earliest nucleolar pre-ribosomal assembly - the 5' external transcribed spacer ribonucleoprotein - provides a mechanism for how conformational changes in multi-protein complexes can be employed to regulate the accessibility of binding sites and therefore define the chronology of maturation events during early stages of ribosome assembly.
History
Deposition
Dec 13, 2018
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Header (metadata) release
Feb 20, 2019
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Map release
Jun 19, 2019
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Update
Mar 20, 2024
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Current status
Mar 20, 2024
Processing site: RCSB / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: LACEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: CARBON / Support film - #1 - topology: CONTINUOUS / Support film - #1 - Film thickness: 2
Vitrification
Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV
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Electron microscopy
Microscope
FEI TITAN KRIOS
Image recording
Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Frames/image: 1-32 / Number grids imaged: 1 / Number real images: 2750 / Average exposure time: 0.25 sec. / Average electron dose: 31.25 e/Å2
Electron beam
Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
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