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- PDB-9n77: SSU processome maturation and disassembly, State K -

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Basic information

Entry
Database: PDB / ID: 9n77
TitleSSU processome maturation and disassembly, State K
Components
  • (40S ribosomal protein ...) x 18
  • (Nucleolar complex protein ...) x 2
  • (Nucleolar protein ...) x 2
  • (U3 small nucleolar RNA-associated protein ...) x 14
  • (U3 small nucleolar ribonucleoprotein protein ...) x 2
  • (rRNA-processing protein ...) x 2
  • 13 kDa ribonucleoprotein-associated protein
  • 18S rRNA
  • 5'ETS rRNA
  • Bud site selection protein 21
  • Dimethyladenosine transferase
  • Essential nuclear protein 1
  • Exosome complex exonuclease RRP6
  • NET1-associated nuclear protein 1
  • Periodic tryptophan protein 2
  • Pre-rRNA-processing protein PNO1
  • Probable ATP-dependent RNA helicase DHR1
  • RNA 3'-terminal phosphate cyclase-like protein
  • Regulator of rDNA transcription protein 14
  • Ribosomal RNA small subunit methyltransferase NEP1
  • Ribosomal RNA-processing protein 9
  • Ribosome biogenesis protein BMS1
  • Small ribosomal subunit protein eS1A
  • Something about silencing protein 10
  • U3 snoRNA
  • Ubiquitin-40S ribosomal protein S31
  • rRNA 2'-O-methyltransferase fibrillarin
KeywordsRIBOSOME / SSU processome / ribosome assembly / RNA folding / RNA-protein interactions
Function / homology
Function and homology information


18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / nuclear polyadenylation-dependent antisense transcript catabolic process / nuclear polyadenylation-dependent snoRNA catabolic process / nuclear polyadenylation-dependent snRNA catabolic process / U1 snRNA 3'-end processing / nuclear polyadenylation-dependent mRNA catabolic process / nuclear polyadenylation-dependent CUT catabolic process / U5 snRNA 3'-end processing / TRAMP-dependent tRNA surveillance pathway ...18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase activity / nuclear polyadenylation-dependent antisense transcript catabolic process / nuclear polyadenylation-dependent snoRNA catabolic process / nuclear polyadenylation-dependent snRNA catabolic process / U1 snRNA 3'-end processing / nuclear polyadenylation-dependent mRNA catabolic process / nuclear polyadenylation-dependent CUT catabolic process / U5 snRNA 3'-end processing / TRAMP-dependent tRNA surveillance pathway / RNA fragment catabolic process / exosome (RNase complex) / rRNA small subunit pseudouridine methyltransferase Nep1 / rRNA 2'-O-methylation / Noc4p-Nop14p complex / U4 snRNA 3'-end processing / nuclear polyadenylation-dependent rRNA catabolic process / poly(A)-dependent snoRNA 3'-end processing / t-UTP complex / nuclear exosome (RNase complex) / Pwp2p-containing subcomplex of 90S preribosome / nuclear microtubule / Mpp10 complex / rRNA (pseudouridine) methyltransferase activity / exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / snoRNA guided rRNA 2'-O-methylation / rRNA modification / histone H2AQ104 methyltransferase activity / septum digestion after cytokinesis / regulation of rRNA processing / rRNA (adenine-N6,N6-)-dimethyltransferase activity / tRNA re-export from nucleus / snRNA binding / histone mRNA catabolic process / RNA folding chaperone / box C/D sno(s)RNA 3'-end processing / nuclear mRNA surveillance / rRNA methyltransferase activity / rDNA heterochromatin / endonucleolytic cleavage in 5'-ETS of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, LSU-rRNA,5S) / regulation of transcription by RNA polymerase I / endonucleolytic cleavage to generate mature 5'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / box C/D methylation guide snoRNP complex / U4/U6 snRNP / tRNA export from nucleus / positive regulation of rRNA processing / single-stranded telomeric DNA binding / rRNA primary transcript binding / sno(s)RNA-containing ribonucleoprotein complex / rRNA base methylation / : / U4 snRNA binding / O-methyltransferase activity / SUMOylation of RNA binding proteins / protein localization to nucleolus / rRNA methylation / mTORC1-mediated signalling / Protein hydroxylation / RNA catabolic process / U4 snRNP / regulation of telomere maintenance / 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 / poly(A)+ mRNA export from nucleus / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / snoRNA binding / precatalytic spliceosome / Major pathway of rRNA processing in the nucleolus and cytosol / establishment of cell polarity / spliceosomal complex assembly / positive regulation of transcription by RNA polymerase I / 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 / 90S preribosome / Ub-specific processing proteases / proteasome assembly / RNA processing / regulation of translational fidelity / ribosomal subunit export from nucleus / U4/U6 x U5 tri-snRNP complex / 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) / ribosomal small subunit export from nucleus / RNA endonuclease activity / nuclear periphery / Transferases; Transferring one-carbon groups; Methyltransferases / ribosome assembly / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / spliceosomal complex / maturation of SSU-rRNA / translational initiation
Similarity search - Function
Regulator of rDNA transcription 14 / Regular of rDNA transcription protein 14 / Exosome-associated factor Rrp6, N-terminal / Exosome complex exonuclease Rrp6-like / : / PMC2NT (NUC016) domain / U3 small nucleolar RNA-associated protein 8 / : / Utp8, N-terminal beta propeller / Utp8, C-terminal ...Regulator of rDNA transcription 14 / Regular of rDNA transcription protein 14 / Exosome-associated factor Rrp6, N-terminal / Exosome complex exonuclease Rrp6-like / : / PMC2NT (NUC016) domain / U3 small nucleolar RNA-associated protein 8 / : / Utp8, N-terminal beta propeller / Utp8, C-terminal / U3 snoRNA associated / U3 snoRNA associated / U3 small nucleolar RNA-associated protein 20, N-terminal / U3 small nucleolar RNA-associated protein 20, C-terminal / : / U3 small nucleolar RNA-associated protein 20, N-terminal / U3 small nucleolar RNA-associated protein 20 domain / Small subunit processome component 20 homolog, C-terminal / WD repeat-containing protein 75 second beta-propeller / Nucleolar complex protein 4 / U3 small nucleolar RNA-associated protein 4 / Small-subunit processome, Utp11 / Nucleolar protein 14 / Fcf2 pre-rRNA processing, C-terminal / Fcf2/DNTTIP2 / : / Utp11 protein / Nop14-like family / Fcf2 pre-rRNA processing / : / U3 small nucleolar RNA-associated protein 15, C-terminal / UTP15 C terminal / rRNA-processing protein Fcf1, PIN domain / WDR3 second beta-propeller domain / WDR3 first beta-propeller domain / Small-subunit processome, Utp14 / U3 small nucleolar RNA-associated protein 18 / Utp14 protein / U3 small nucleolar RNA-associated protein 13, C-terminal / Periodic tryptophan protein 2 / Utp13 specific WD40 associated domain / BP28, C-terminal domain / Nucleolar protein 58/56, N-terminal / U3 small nucleolar RNA-associated protein 10, N-terminal / U3 small nucleolar RNA-associated protein 10 / : / BP28CT (NUC211) domain / NOP5NT (NUC127) domain / U3 small nucleolar RNA-associated protein 10 / HEATR1-like, HEAT repeats / BP28CT (NUC211) domain / rRNA-processing protein Fcf1/Utp23 / Sas10 C-terminal domain / : / Fcf1 / Sas10 C-terminal domain / Small-subunit processome, Utp12 / Dip2/Utp12 Family / Small-subunit processome, Utp21 / Utp21 specific WD40 associated putative domain / WDR36/Utp21 second beta-propeller domain / WDR36/Utp21 first beta-propeller / RNA 3'-terminal phosphate cyclase-like, conserved site / Ribosome biogenesis protein Bms1, N-terminal / RNA 3'-terminal phosphate cyclase signature. / Ribosomal RNA-processing protein Rrp9-like / Sas10/Utp3/C1D / U3 small nucleolar ribonucleoprotein complex, subunit Mpp10 / RNA 3'-terminal phosphate cyclase type 2 / Sas10/Utp3/C1D family / Mpp10 protein / RNA 3'-terminal phosphate cyclase / Ribosomal biogenesis, methyltransferase, EMG1/NEP1 / Ribosomal RNA adenine dimethylase / RNA 3'-terminal phosphate cyclase, insert domain / RNA 3'-terminal phosphate cyclase domain / RNA 3'-terminal phosphate cyclase, insert domain superfamily / RNA 3'-terminal phosphate cyclase domain superfamily / Nucleolar protein Nop56/Nop58 / RNA 3'-terminal phosphate cyclase / EMG1/NEP1 methyltransferase / RNA 3'-terminal phosphate cyclase (RTC), insert domain / Helicase and RNase D C-terminal / HRDC domain / HRDC domain / HRDC domain profile. / CCAAT-binding factor / CBF/Mak21 family / rRNA 2'-O-methyltransferase fibrillarin-like / Fibrillarin, conserved site / Fibrillarin / Fibrillarin signature. / Fibrillarin / Bystin / Krr1, KH1 domain / Bystin / Krr1 KH1 domain / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine dimethylases signature. / :
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS4A / Small ribosomal subunit protein uS15 / Ubiquitin-ribosomal protein eS31 fusion protein ...ADENOSINE-5'-DIPHOSPHATE / GUANOSINE-5'-TRIPHOSPHATE / : / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein uS4A / Small ribosomal subunit protein uS15 / Ubiquitin-ribosomal protein eS31 fusion protein / Small ribosomal subunit protein uS11A / Small ribosomal subunit protein eS19A / Small ribosomal subunit protein uS8A / Small ribosomal subunit protein uS12A / Small ribosomal subunit protein eS24A / Small ribosomal subunit protein eS4A / Small ribosomal subunit protein eS6A / Small ribosomal subunit protein eS8A / Small ribosomal subunit protein uS17A / Small ribosomal subunit protein uS9A / Small ribosomal subunit protein uS13A / rRNA 2'-O-methyltransferase fibrillarin / Periodic tryptophan protein 2 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein eS7A / U3 small nucleolar ribonucleoprotein protein IMP3 / Small ribosomal subunit protein eS1A / U3 small nucleolar RNA-associated protein 11 / U3 small nucleolar RNA-associated protein 20 / Small ribosomal subunit protein eS27A / Essential nuclear protein 1 / U3 small nucleolar RNA-associated protein 9 / 13 kDa ribonucleoprotein-associated protein / U3 small nucleolar RNA-associated protein 18 / Regulator of rDNA transcription protein 14 / Dimethyladenosine transferase / U3 small nucleolar RNA-associated protein 10 / U3 small nucleolar RNA-associated protein MPP10 / Small ribosomal subunit protein eS12 / U3 small nucleolar RNA-associated protein 8 / U3 small nucleolar ribonucleoprotein protein IMP4 / NET1-associated nuclear protein 1 / U3 small nucleolar RNA-associated protein 5 / Probable ATP-dependent RNA helicase DHR1 / U3 small nucleolar RNA-associated protein 15 / U3 small nucleolar RNA-associated protein 14 / rRNA-processing protein FCF1 / U3 small nucleolar RNA-associated protein 13 / U3 small nucleolar RNA-associated protein 21 / Ribosomal RNA small subunit methyltransferase NEP1 / Ribosomal RNA-processing protein 9 / Nucleolar complex protein 4 / U3 small nucleolar RNA-associated protein 4 / rRNA processing protein RCL1 / U3 small nucleolar RNA-associated protein 16 / Ribosome biogenesis protein BMS1 / rRNA-processing protein FCF2 / Something about silencing protein 10 / Exosome complex exonuclease RRP6 / U3 small nucleolar RNA-associated protein 12 / Nucleolar protein 56 / Nucleolar protein 58 / Small ribosomal subunit protein eS28A / Nucleolar complex protein 14 / Pre-rRNA-processing protein PNO1
Similarity search - Component
Biological speciesSaccharomyces cerevisiae S288C (yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.94 Å
AuthorsBuzovetsky, O. / Klinge, S.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)5R01GM145950-03 United States
Chan Zuckerberg Initiative2023-332391 United States
CitationJournal: Nature / Year: 2025
Title: Helicase-mediated mechanism of SSU processome maturation and disassembly.
Authors: Olga Buzovetsky / Sebastian Klinge /
Abstract: Eukaryotic ribosomal small subunit (SSU) assembly requires the SSU processome, a nucleolar precursor containing the RNA chaperone U3 small nucleolar RNA (snoRNA). The underlying molecular mechanisms ...Eukaryotic ribosomal small subunit (SSU) assembly requires the SSU processome, a nucleolar precursor containing the RNA chaperone U3 small nucleolar RNA (snoRNA). The underlying molecular mechanisms of SSU processome maturation, remodelling, disassembly and RNA quality control, and the transitions between states remain unknown owing to a paucity of intermediates. Here we report 16 native SSU processome structures alongside genetic data, revealing how two helicases, the Mtr4-exosome and Dhr1, are controlled for accurate and unidirectional ribosome biogenesis. Our data show how irreversible pre-ribosomal RNA degradation by the redundantly tethered RNA exosome couples the transformation of the SSU processome into a pre-40S particle, during which Utp14 can probe evolving surfaces, ultimately positioning and activating Dhr1 to unwind the U3 snoRNA and initiate nucleolar pre-40S release. This study highlights a paradigm for large dynamic RNA-protein complexes in which irreversible RNA degradation drives compositional changes and communicates these changes to govern enzyme activity while maintaining overall quality control.
History
DepositionFeb 5, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 5, 2025Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
L0: 5'ETS rRNA
L1: 18S rRNA
L2: U3 snoRNA
L3: 40S ribosomal protein S18-A
L4: 40S ribosomal protein S4-A
L5: 40S ribosomal protein S5
L6: 40S ribosomal protein S6-A
L7: 40S ribosomal protein S7-A
L8: 40S ribosomal protein S8-A
L9: 40S ribosomal protein S9-A
LC: 40S ribosomal protein S16-A
LD: 40S ribosomal protein S11-A
LE: 40S ribosomal protein S22-A
LF: 40S ribosomal protein S24-A
LG: 40S ribosomal protein S28-A
LH: NET1-associated nuclear protein 1
LI: U3 small nucleolar RNA-associated protein 8
LJ: U3 small nucleolar RNA-associated protein 15
LK: U3 small nucleolar RNA-associated protein 9
LL: U3 small nucleolar RNA-associated protein 5
LM: U3 small nucleolar RNA-associated protein 10
LN: U3 small nucleolar RNA-associated protein 4
LO: Periodic tryptophan protein 2
LQ: U3 small nucleolar RNA-associated protein 12
LR: U3 small nucleolar RNA-associated protein 13
LS: U3 small nucleolar RNA-associated protein 18
LT: U3 small nucleolar RNA-associated protein 21
LZ: U3 small nucleolar ribonucleoprotein protein IMP3
NA: U3 small nucleolar RNA-associated protein MPP10
NB: Something about silencing protein 10
ND: Bud site selection protein 21
NF: 40S ribosomal protein S13
NG: 40S ribosomal protein S14-A
NL: Dimethyladenosine transferase
NM: Small ribosomal subunit protein eS1A
NP: 40S ribosomal protein S19-A
NQ: 40S ribosomal protein S27-A
NS: Probable ATP-dependent RNA helicase DHR1
NV: Exosome complex exonuclease RRP6
OH: 40S ribosomal protein S12
OU: Ubiquitin-40S ribosomal protein S31
SA: Nucleolar protein 56
SB: Nucleolar protein 58
SC: rRNA 2'-O-methyltransferase fibrillarin
SD: rRNA 2'-O-methyltransferase fibrillarin
SE: 13 kDa ribonucleoprotein-associated protein
SF: 13 kDa ribonucleoprotein-associated protein
SG: Ribosomal RNA-processing protein 9
SH: RNA 3'-terminal phosphate cyclase-like protein
SI: Ribosome biogenesis protein BMS1
SJ: Ribosomal RNA small subunit methyltransferase NEP1
SK: Ribosomal RNA small subunit methyltransferase NEP1
SL: rRNA-processing protein FCF1
SM: U3 small nucleolar ribonucleoprotein protein IMP4
SP: U3 small nucleolar RNA-associated protein 20
SQ: rRNA-processing protein FCF2
SR: 40S ribosomal protein S23-A
SS: U3 small nucleolar RNA-associated protein 14
ST: Nucleolar complex protein 14
SU: Nucleolar complex protein 4
SV: Regulator of rDNA transcription protein 14
SW: Pre-rRNA-processing protein PNO1
SY: U3 small nucleolar RNA-associated protein 11
SZ: Essential nuclear protein 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)4,150,250116
Polymers4,148,00264
Non-polymers2,24852
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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RNA chain , 3 types, 3 molecules L0L1L2

#1: RNA chain 5'ETS rRNA


Mass: 225543.094 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: GenBank: 1262303
#2: RNA chain 18S rRNA


Mass: 580765.688 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: GenBank: 1262303
#3: RNA chain U3 snoRNA


Mass: 106943.469 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741

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40S ribosomal protein ... , 18 types, 18 molecules L3L4L5L6L7L8L9LCLDLELFLGNFNGNPNQOHSR

#4: Protein 40S ribosomal protein S18-A / Small ribosomal subunit protein uS13-A


Mass: 17071.641 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX55
#5: Protein 40S ribosomal protein S4-A / RP5 / S7 / YS6


Mass: 29469.330 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX35
#6: Protein 40S ribosomal protein S5 / RP14 / S2 / YS8


Mass: 25072.600 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P26783
#7: Protein 40S ribosomal protein S6-A / RP9 / S10 / YS4


Mass: 27054.486 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX37
#8: Protein 40S ribosomal protein S7-A / RP30 / RP40


Mass: 21658.209 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P26786
#9: Protein 40S ribosomal protein S8-A / RP19 / S14 / YS9


Mass: 22537.803 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX39
#10: Protein 40S ribosomal protein S9-A / RP21 / S13 / YP28 / YS11


Mass: 22487.893 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: O13516
#11: Protein 40S ribosomal protein S16-A / RP61R


Mass: 15877.490 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX51
#12: Protein 40S ribosomal protein S11-A / RP41 / S18 / YS12


Mass: 17785.934 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX47
#13: Protein 40S ribosomal protein S22-A / RP50 / S24 / YP58 / YS22


Mass: 14650.062 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0C0W1
#14: Protein 40S ribosomal protein S24-A / RP50


Mass: 15362.848 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX31
#15: Protein 40S ribosomal protein S28-A / S33 / Small ribosomal subunit protein eS28-A / YS27


Mass: 7605.847 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q3E7X9
#32: Protein 40S ribosomal protein S13 / S27a / Small ribosomal subunit protein uS15 / YS15


Mass: 17059.945 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P05756
#33: Protein 40S ribosomal protein S14-A / RP59A / Small ribosomal subunit protein uS11-A


Mass: 14562.655 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P06367
#36: Protein 40S ribosomal protein S19-A / RP55A / S16a / Small ribosomal subunit protein eS19-A / YP45 / YS16A


Mass: 15942.125 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P07280
#37: Protein 40S ribosomal protein S27-A / RP61 / Small ribosomal subunit protein eS27-A / YS20


Mass: 8893.391 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P35997
#40: Protein 40S ribosomal protein S12


Mass: 15488.631 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P48589
#54: Protein 40S ribosomal protein S23-A / RP37 / S28 / YS14


Mass: 16073.896 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P0CX29

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Protein , 18 types, 21 molecules LHLONBNDNLNMNSNVOUSCSDSESFSGSHSISJSKSVSWSZ

#16: Protein NET1-associated nuclear protein 1 / U three protein 17 / t-17 / U3 protein 17 required for transcription / U3 small nucleolar RNA- ...U three protein 17 / t-17 / U3 protein 17 required for transcription / U3 small nucleolar RNA-associated protein 17 / U3 snoRNA-associated protein 17


Mass: 101341.734 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q02931
#23: Protein Periodic tryptophan protein 2 / U three protein 1 / U3 small nucleolar RNA-associated protein 1 / U3 snoRNA-associated protein 1


Mass: 104097.039 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P25635
#30: Protein Something about silencing protein 10 / U three protein 3 / U3 small nucleolar RNA-associated protein 3 / U3 snoRNA-associated protein 11


Mass: 70364.398 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q12136
#31: Protein Bud site selection protein 21 / U three protein 16 / U3 small nucleolar RNA-associated protein 16 / U3 snoRNA-associated protein 16


Mass: 24431.016 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q08492
#34: Protein Dimethyladenosine transferase / 18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase / 18S rRNA dimethylase / S- ...18S rRNA (adenine(1779)-N(6)/adenine(1780)-N(6))-dimethyltransferase / 18S rRNA dimethylase / S-adenosylmethionine-6-N' / N'-adenosyl(rRNA) dimethyltransferase


Mass: 36003.836 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741
References: UniProt: P41819, 18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase
#35: Protein Small ribosomal subunit protein eS1A / 40S ribosomal protein S1-A / RP10A


Mass: 28798.467 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P33442
#38: Protein Probable ATP-dependent RNA helicase DHR1 / DEAH box RNA helicase DHR1 / Extracellular mutant protein 16


Mass: 145171.406 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q04217, RNA helicase
#39: Protein Exosome complex exonuclease RRP6 / Rrp6p / Ribosomal RNA-processing protein 6


Mass: 84160.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741
References: UniProt: Q12149, Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters
#41: Protein Ubiquitin-40S ribosomal protein S31


Mass: 17254.227 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P05759
#44: Protein rRNA 2'-O-methyltransferase fibrillarin / Histone-glutamine methyltransferase / U3 small nucleolar RNA-associated protein NOP1 / U3 snoRNA- ...Histone-glutamine methyltransferase / U3 small nucleolar RNA-associated protein NOP1 / U3 snoRNA-associated protein NOP1


Mass: 34525.418 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741
References: UniProt: P15646, Transferases; Transferring one-carbon groups; Methyltransferases
#45: Protein 13 kDa ribonucleoprotein-associated protein / Small nuclear ribonucleoprotein-associated protein 1


Mass: 13582.855 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P39990
#46: Protein Ribosomal RNA-processing protein 9


Mass: 65146.969 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q06506
#47: Protein RNA 3'-terminal phosphate cyclase-like protein


Mass: 40220.559 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q08096
#48: Protein Ribosome biogenesis protein BMS1


Mass: 135792.281 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q08965
#49: Protein Ribosomal RNA small subunit methyltransferase NEP1 / 18S rRNA (pseudouridine(1189)-N1)-methyltransferase / 18S rRNA Psi1189 methyltransferase / ...18S rRNA (pseudouridine(1189)-N1)-methyltransferase / 18S rRNA Psi1189 methyltransferase / Essential for mitotic growth protein 1 / Nucleolar essential protein 1


Mass: 27936.461 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741
References: UniProt: Q06287, rRNA small subunit pseudouridine methyltransferase Nep1
#58: Protein Regulator of rDNA transcription protein 14


Mass: 23898.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P40470
#59: Protein Pre-rRNA-processing protein PNO1 / Partner of NOB1 / Ribosomal RNA-processing protein 20


Mass: 30380.623 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q99216
#61: Protein Essential nuclear protein 1


Mass: 55207.422 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P38333

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U3 small nucleolar RNA-associated protein ... , 14 types, 14 molecules LILJLKLLLMLNLQLRLSLTNASPSSSY

#17: Protein U3 small nucleolar RNA-associated protein 8 / U3 snoRNA-associated protein 8 / U three protein 8 / U3 protein 8 required for transcription / t-UTP8


Mass: 80269.648 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P53276
#18: Protein U3 small nucleolar RNA-associated protein 15 / U3 snoRNA-associated protein 15 / U three protein 15 / U3 protein 15 required for transcription / t-UTP15


Mass: 57765.289 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q04305
#19: Protein U3 small nucleolar RNA-associated protein 9 / U3 snoRNA-associated protein 9 / U three protein 9 / U3 protein 9 required for transcription / t-UTP9


Mass: 65347.254 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P38882
#20: Protein U3 small nucleolar RNA-associated protein 5 / U3 snoRNA-associated protein 5 / U three protein 5 / U3 protein 5 required for transcription / t-UTP5


Mass: 72079.445 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q04177
#21: Protein U3 small nucleolar RNA-associated protein 10 / U3 snoRNA-associated protein 10 / U three protein 10 / U3 protein 10 required for transcription / t-UTP10


Mass: 200298.984 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P42945
#22: Protein U3 small nucleolar RNA-associated protein 4 / U3 snoRNA-associated protein 4 / U three protein 4 / U3 protein 4 required for transcription / t-UTP4


Mass: 87909.242 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q06679
#24: Protein U3 small nucleolar RNA-associated protein 12 / U3 snoRNA-associated protein 12 / DOM34-interacting protein 2 / U three protein 12


Mass: 106481.133 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q12220
#25: Protein U3 small nucleolar RNA-associated protein 13 / U3 snoRNA-associated protein 13 / U three protein 13


Mass: 91132.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q05946
#26: Protein U3 small nucleolar RNA-associated protein 18 / U3 snoRNA-associated protein 18 / U three protein 18


Mass: 66574.227 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P40362
#27: Protein U3 small nucleolar RNA-associated protein 21 / U3 snoRNA-associated protein 21 / U three protein 21


Mass: 104927.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q06078
#29: Protein U3 small nucleolar RNA-associated protein MPP10 / U3 snoRNA-associated protein MPP10 / M phase phosphoprotein 10


Mass: 67042.492 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P47083
#52: Protein U3 small nucleolar RNA-associated protein 20 / U3 snoRNA-associated protein 20 / U three protein 20


Mass: 287915.500 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P35194
#55: Protein U3 small nucleolar RNA-associated protein 14 / U3 snoRNA-associated protein 14 / U three protein 14


Mass: 103189.750 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q04500
#60: Protein U3 small nucleolar RNA-associated protein 11 / U3 snoRNA-associated protein 11 / U three protein 11


Mass: 29806.348 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P34247

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U3 small nucleolar ribonucleoprotein protein ... , 2 types, 2 molecules LZSM

#28: Protein U3 small nucleolar ribonucleoprotein protein IMP3 / U3 snoRNP protein IMP3 / Interacting with MPP10 protein 3


Mass: 21928.529 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P32899
#51: Protein U3 small nucleolar ribonucleoprotein protein IMP4 / U3 snoRNP protein IMP4 / Interacting with MPP10 protein 4


Mass: 33536.168 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: P53941

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Nucleolar protein ... , 2 types, 2 molecules SASB

#42: Protein Nucleolar protein 56 / Ribosome biosynthesis protein SIK1 / Suppressor of I kappa b protein 1


Mass: 56961.152 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q12460
#43: Protein Nucleolar protein 58 / Nucleolar protein 5


Mass: 57060.344 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q12499

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RRNA-processing protein ... , 2 types, 2 molecules SLSQ

#50: Protein rRNA-processing protein FCF1 / FAF1-copurifying factor 1


Mass: 21650.729 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q05498
#53: Protein rRNA-processing protein FCF2 / FAF1 copurifying factor 2


Mass: 25689.240 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q12035

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Nucleolar complex protein ... , 2 types, 2 molecules STSU

#56: Protein Nucleolar complex protein 14 / U three protein 2 / U3 small nucleolar RNA-associated protein 2 / U3 snoRNA-associated protein 2


Mass: 94463.195 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q99207
#57: Protein Nucleolar complex protein 4 / U three protein 19 / U3 small nucleolar RNA-associated protein 19 / U3 snoRNA-associated protein 19


Mass: 63707.844 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae S288C (yeast) / Cell line: BY4741 / References: UniProt: Q06512

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Non-polymers , 4 types, 52 molecules

#62: Chemical...
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 48 / Source method: obtained synthetically / Formula: Mg
#63: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn
#64: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Comment: ADP, energy-carrying molecule*YM
#65: Chemical ChemComp-GTP / GUANOSINE-5'-TRIPHOSPHATE


Mass: 523.180 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H16N5O14P3 / Comment: GTP, energy-carrying molecule*YM

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Details

Has ligand of interestN
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: SSU processome maturation and disassembly, State K / Type: COMPLEX / Entity ID: #1-#61 / Source: NATURAL
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameBuffer-ID
160 mMTris-HCl1
250 mMNaCl1
35 mMMgCl1
42 %glycerol1
50.01 %NP-401
61 mMDTT1
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 25000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 61.6 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.94 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 19571 / Symmetry type: POINT

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