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- PDB-6g4s: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B -

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Basic information

Entry
Database: PDB / ID: 6g4s
TitleCryo-EM structure of a late human pre-40S ribosomal subunit - State B
Components
  • (40S ribosomal protein ...) x 25
  • (RNA-binding protein ...) x 2
  • Bystin
  • Pre-rRNA-processing protein TSR1 homolog
  • Protein LTV1 homolog
  • RRP12
  • Unknown
  • pre-18S ribosomal RNA
KeywordsRIBOSOME / 40S / pre-40S / ribosome biogenesis
Function / homology
Function and homology information


regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex ...regulation of protein localization to nucleolus / endonucleolytic cleavage of tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / trophectodermal cell differentiation / positive regulation of respiratory burst involved in inflammatory response / nucleolus organization / negative regulation of RNA splicing / neural crest cell differentiation / positive regulation of ubiquitin-protein transferase activity / rRNA modification in the nucleus and cytosol / Formation of the ternary complex, and subsequently, the 43S complex / erythrocyte homeostasis / cytoplasmic side of rough endoplasmic reticulum membrane / U3 snoRNA binding / laminin receptor activity / negative regulation of ubiquitin protein ligase activity / Ribosomal scanning and start codon recognition / preribosome, small subunit precursor / Translation initiation complex formation / snoRNA binding / mammalian oogenesis stage / activation-induced cell death of T cells / fibroblast growth factor binding / Protein hydroxylation / monocyte chemotaxis / mTORC1-mediated signalling / SARS-CoV-1 modulates host translation machinery / Peptide chain elongation / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / Selenocysteine synthesis / positive regulation of signal transduction by p53 class mediator / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / ubiquitin ligase inhibitor activity / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / negative regulation of respiratory burst involved in inflammatory response / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / TOR signaling / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / L13a-mediated translational silencing of Ceruloplasmin expression / T cell proliferation involved in immune response / Major pathway of rRNA processing in the nucleolus and cytosol / regulation of translational fidelity / erythrocyte development / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / negative regulation of ubiquitin-dependent protein catabolic process / Protein methylation / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / translation regulator activity / Nuclear events stimulated by ALK signaling in cancer / ribosomal small subunit export from nucleus / positive regulation of cell cycle / stress granule assembly / Mitotic Prometaphase / cytosolic ribosome / laminin binding / EML4 and NUDC in mitotic spindle formation / 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) / rough endoplasmic reticulum / antiviral innate immune response / gastrulation / MDM2/MDM4 family protein binding / translation initiation factor binding / Resolution of Sister Chromatid Cohesion / RNA endonuclease activity / visual perception / erythrocyte differentiation / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / innate immune response in mucosa / stem cell proliferation / cellular response to leukemia inhibitory factor / maturation of SSU-rRNA / neural tube closure / small-subunit processome / mRNA 3'-UTR binding / positive regulation of translation / translational initiation / RHO GTPases Activate Formins / liver regeneration / maintenance of translational fidelity / response to virus / placenta development / mRNA 5'-UTR binding / RMTs methylate histone arginines / Regulation of expression of SLITs and ROBOs / cytoplasmic ribonucleoprotein granule / osteoblast differentiation / rRNA processing / G1/S transition of mitotic cell cycle / Separation of Sister Chromatids / antimicrobial humoral immune response mediated by antimicrobial peptide / ribosome biogenesis / apical part of cell / ribosome binding / glucose homeostasis / virus receptor activity / chromosome / ribosomal small subunit biogenesis
Similarity search - Function
Ribosomal protein S8e, subdomain / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #1000 / Ribosomal protein S4, central domain / Phosducin; domain 2 / Ribosomal protein S21 / Alpha-Beta Plaits - #3370 / Hypothetical Cytosolic Protein; Chain: A; / Putative WW-binding domain and destruction box / Putative WW-binding domain and destruction box / Ribosomal protein S27 ...Ribosomal protein S8e, subdomain / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #1000 / Ribosomal protein S4, central domain / Phosducin; domain 2 / Ribosomal protein S21 / Alpha-Beta Plaits - #3370 / Hypothetical Cytosolic Protein; Chain: A; / Putative WW-binding domain and destruction box / Putative WW-binding domain and destruction box / Ribosomal protein S27 / Nin one binding (NOB1) Zn-ribbon-like / Ribonuclease Nob1, eukaryote / NOB1 zinc finger-like superfamily / Nin one binding (NOB1) Zn-ribbon like / Low temperature viability protein Ltv1 / Ribonuclease, PIN domain / RNA-binding protein NOB1 / Low temperature viability protein / PIN domain of ribonuclease / Bystin / Bystin / Large family of predicted nucleotide-binding domains / Ribosomal Protein S8; Chain: A, domain 1 - #30 / Ribosome biogenesis protein BMS1/TSR1, C-terminal / AARP2CN / Bms1/Tsr1-type G domain / Ribosome biogenesis protein Bms1/Tsr1 / 40S ribosome biogenesis protein Tsr1 and BMS1 C-terminal / AARP2CN (NUC121) domain / Bms1-type guanine nucleotide-binding (G) domain profile. / AARP2CN (NUC121) domain / Protein of unknown function (DUF663) / RNA-binding S4 domain / Ribosomal Protein S7 / Ribosomal protein S7/S5 / Dna Ligase; domain 1 - #10 / Ribosomal protein S11/S14 / PIN domain / Structural Genomics Hypothetical 15.5 Kd Protein In mrcA-pckA Intergenic Region; Chain A / S15/NS1, RNA-binding / SH3 type barrels. - #30 / Double Stranded RNA Binding Domain - #20 / Glucose-6-phosphate isomerase like protein; domain 1 / Ribosomal Protein S8; Chain: A, domain 1 / 40S ribosomal protein SA / K Homology domain, type 1 superfamily / 40S ribosomal protein SA, C-terminal domain / 40S ribosomal protein SA C-terminus / Ribosomal Protein S5; domain 2 - #10 / N-terminal domain of TfIIb / Ubiquitin-like protein FUBI / Ribosomal Protein S5; domain 2 / Double Stranded RNA Binding Domain / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / Ribosomal protein S5, eukaryotic/archaeal / Ribosomal protein S19e, conserved site / Ribosomal protein S19e signature. / Ribosomal protein S21e / Ribosomal protein S2, eukaryotic / Ribosomal protein S21e superfamily / Ribosomal protein S21e / Ribosomal protein S25 / S25 ribosomal protein / Ribosomal protein S2, eukaryotic/archaeal / : / Ribosomal protein S17e, conserved site / Ribosomal protein S17e signature. / Ribosomal protein S8e subdomain, eukaryotes / Ribosomal protein S30 / Ribosomal protein S30 / Ribosomal protein S7e signature. / : / Ribosomal protein S19e / Ribosomal protein S3Ae, conserved site / Ribosomal protein S19e / Ribosomal protein S3Ae signature. / Ribosomal_S19e / Ribosomal protein S27e signature. / Ribosomal protein S4e, N-terminal, conserved site / Ribosomal protein S4e signature. / 40S ribosomal protein S4, C-terminal domain / 40S ribosomal protein S4 C-terminus / Ribosomal protein S19A/S15e / Ribosomal protein S8e, conserved site / Ribosomal protein S8e signature. / Ribosomal protein S17e / Ribosomal protein S17e-like superfamily / Ribosomal S17 / Ribosomal protein S6, eukaryotic / Ribosomal protein S4e, N-terminal / RS4NT (NUC023) domain / 40S ribosomal protein S1/3, eukaryotes / Ribosomal S24e conserved site / Ribosomal protein S24e signature. / 40S ribosomal protein S11, N-terminal / Ribosomal_S17 N-terminal / Ribosomal protein S7e / Ribosomal protein S7e / Ribosomal protein S4, KOW domain
Similarity search - Domain/homology
: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein eS17 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein eS19 / Small ribosomal subunit protein eS27 ...: / RNA / RNA (> 10) / RNA (> 100) / RNA (> 1000) / Small ribosomal subunit protein eS17 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein eS19 / Small ribosomal subunit protein eS27 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS7 / Small ribosomal subunit protein eS1 / Small ribosomal subunit protein eS7 / Small ribosomal subunit protein eS8 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein uS15 / Small ribosomal subunit protein uS17 / Small ribosomal subunit protein eS4, X isoform / Small ribosomal subunit protein eS6 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein eS24 / Small ribosomal subunit protein eS25 / Small ribosomal subunit protein eS28 / Ubiquitin-like FUBI-ribosomal protein eS30 fusion protein / Small ribosomal subunit protein eS21 / Bystin / Pre-rRNA-processing protein TSR1 homolog / Protein LTV1 homolog / RNA-binding protein PNO1 / RNA-binding protein NOB1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4 Å
AuthorsAmeismeier, M. / Cheng, J. / Berninghausen, O. / Beckmann, R.
Funding support Germany, 4items
OrganizationGrant numberCountry
German Research FoundationSFB646 Germany
German Research FoundationGRK1721 Germany
German Research FoundationFOR1805 Germany
European Research CouncilCRYOTRANSLATION Germany
CitationJournal: Nature / Year: 2018
Title: Visualizing late states of human 40S ribosomal subunit maturation.
Authors: Michael Ameismeier / Jingdong Cheng / Otto Berninghausen / Roland Beckmann /
Abstract: The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high- ...The formation of eukaryotic ribosomal subunits extends from the nucleolus to the cytoplasm and entails hundreds of assembly factors. Despite differences in the pathways of ribosome formation, high-resolution structural information has been available only from fungi. Here we present cryo-electron microscopy structures of late-stage human 40S assembly intermediates, representing one state reconstituted in vitro and five native states that range from nuclear to late cytoplasmic. The earliest particles reveal the position of the biogenesis factor RRP12 and distinct immature rRNA conformations that accompany the formation of the 40S subunit head. Molecular models of the late-acting assembly factors TSR1, RIOK1, RIOK2, ENP1, LTV1, PNO1 and NOB1 provide mechanistic details that underlie their contribution to a sequential 40S subunit assembly. The NOB1 architecture displays an inactive nuclease conformation that requires rearrangement of the PNO1-bound 3' rRNA, thereby coordinating the final rRNA folding steps with site 3 cleavage.
History
DepositionMar 28, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 6, 2018Provider: repository / Type: Initial release
Revision 1.1Jun 20, 2018Group: Data collection / Database references / Category: citation / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Jun 27, 2018Group: Data collection / Database references / Category: citation
Item: _citation.journal_id_ISSN / _citation.journal_volume ..._citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Dec 11, 2019Group: Other / Category: atom_sites
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3]
Revision 1.4May 15, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

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Assembly

Deposited unit
2: pre-18S ribosomal RNA
R: 40S ribosomal protein S17
A: 40S ribosomal protein SA
b: 40S ribosomal protein S27
B: 40S ribosomal protein S3a
C: 40S ribosomal protein S2
c: 40S ribosomal protein S28
E: 40S ribosomal protein S4, X isoform
e: 40S ribosomal protein S30
F: 40S ribosomal protein S5
H: 40S ribosomal protein S7
G: 40S ribosomal protein S6
Z: 40S ribosomal protein S25
Y: 40S ribosomal protein S24
y: RNA-binding protein NOB1
x: RNA-binding protein PNO1
X: 40S ribosomal protein S23
w: Bystin
W: 40S ribosomal protein S15a
V: 40S ribosomal protein S21
u: Pre-rRNA-processing protein TSR1 homolog
t: Protein LTV1 homolog
T: 40S ribosomal protein S19
S: 40S ribosomal protein S18
Q: 40S ribosomal protein S16
P: 40S ribosomal protein S15
O: 40S ribosomal protein S14
N: 40S ribosomal protein S13
L: 40S ribosomal protein S11
J: 40S ribosomal protein S9
I: 40S ribosomal protein S8
s: RRP12
k: Unknown


Theoretical massNumber of molelcules
Total (without water)1,421,97333
Polymers1,421,97333
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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40S ribosomal protein ... , 25 types, 25 molecules RAbBCcEeFHGZYXWVTSQPONLJI

#2: Protein 40S ribosomal protein S17 / Small ribosomal subunit protein eS17


Mass: 15578.156 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P08708
#3: Protein 40S ribosomal protein SA / 37 kDa laminin receptor precursor / 37LRP / 37/67 kDa laminin receptor / LRP/LR / 67 kDa laminin ...37 kDa laminin receptor precursor / 37LRP / 37/67 kDa laminin receptor / LRP/LR / 67 kDa laminin receptor / 67LR / Colon carcinoma laminin-binding protein / Laminin receptor 1 / LamR / Laminin-binding protein precursor p40 / LBP/p40 / Multidrug resistance-associated protein MGr1-Ag / NEM/1CHD4 / Small ribosomal subunit protein uS2


Mass: 32883.938 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P08865
#4: Protein 40S ribosomal protein S27 / Metallopan-stimulin 1 / MPS-1 / Small ribosomal subunit protein eS27


Mass: 9480.186 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P42677
#5: Protein 40S ribosomal protein S3a / Small ribosomal subunit protein eS1 / v-fos transformation effector protein / Fte-1


Mass: 30002.061 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P61247
#6: Protein 40S ribosomal protein S2 / 40S ribosomal protein S4 / Protein LLRep3 / Small ribosomal subunit protein uS5


Mass: 31376.516 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P15880
#7: Protein 40S ribosomal protein S28 / Small ribosomal subunit protein eS28


Mass: 7855.052 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62857
#8: Protein 40S ribosomal protein S4, X isoform / SCR10 / Single copy abundant mRNA protein / Small ribosomal subunit protein eS4


Mass: 29654.869 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62701
#9: Protein 40S ribosomal protein S30 / Small ribosomal subunit protein eS30


Mass: 6668.938 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62861
#10: Protein 40S ribosomal protein S5 / Small ribosomal subunit protein uS7


Mass: 22913.453 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P46782
#11: Protein 40S ribosomal protein S7 / Small ribosomal subunit protein eS7


Mass: 22168.914 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62081
#12: Protein 40S ribosomal protein S6 / Phosphoprotein NP33 / Small ribosomal subunit protein eS6


Mass: 28751.906 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62753
#13: Protein 40S ribosomal protein S25 / Small ribosomal subunit protein eS25


Mass: 13776.224 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62851
#14: Protein 40S ribosomal protein S24 / Small ribosomal subunit protein eS24


Mass: 15463.333 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62847
#17: Protein 40S ribosomal protein S23 / Small ribosomal subunit protein uS12


Mass: 15844.666 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: UniProt: P62266
#19: Protein 40S ribosomal protein S15a / Small ribosomal subunit protein uS8


Mass: 14865.555 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62244
#20: Protein 40S ribosomal protein S21 / Small ribosomal subunit protein eS21


Mass: 9124.389 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P63220
#23: Protein 40S ribosomal protein S19 / Small ribosomal subunit protein eS19


Mass: 16091.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P39019
#24: Protein 40S ribosomal protein S18 / Ke-3 / Ke3 / Small ribosomal subunit protein uS13


Mass: 17759.777 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62269
#25: Protein 40S ribosomal protein S16 / Small ribosomal subunit protein uS9


Mass: 16477.377 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62249
#26: Protein 40S ribosomal protein S15 / RIG protein / Small ribosomal subunit protein uS19


Mass: 17076.207 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62841
#27: Protein 40S ribosomal protein S14 / Small ribosomal subunit protein uS11


Mass: 16302.772 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62263
#28: Protein 40S ribosomal protein S13 / Small ribosomal subunit protein uS15


Mass: 17259.389 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62277
#29: Protein 40S ribosomal protein S11 / Small ribosomal subunit protein uS17


Mass: 18468.826 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62280
#30: Protein 40S ribosomal protein S9 / Small ribosomal subunit protein uS4


Mass: 22641.564 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P46781
#31: Protein 40S ribosomal protein S8 / Small ribosomal subunit protein eS8


Mass: 24263.387 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: P62241

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RNA-binding protein ... , 2 types, 2 molecules yx

#15: Protein RNA-binding protein NOB1 / Phosphorylation regulatory protein HP-10 / Protein ART-4


Mass: 46743.914 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q9ULX3
#16: Protein RNA-binding protein PNO1


Mass: 27970.355 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q9NRX1

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Protein , 4 types, 4 molecules wuts

#18: Protein Bystin


Mass: 49673.258 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q13895
#21: Protein Pre-rRNA-processing protein TSR1 homolog


Mass: 91951.188 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q2NL82
#22: Protein Protein LTV1 homolog


Mass: 54935.891 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293 / References: UniProt: Q96GA3
#32: Protein RRP12


Mass: 68101.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293

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RNA chain / Protein/peptide , 2 types, 2 molecules 2k

#1: RNA chain pre-18S ribosomal RNA


Mass: 607057.688 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / References: GenBank: 151415227
#33: Protein/peptide Unknown


Mass: 2790.050 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Cell line: HEK293

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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: Cryo-EM structure of a late human pre-40S ribosomal subunit - State B
Type: RIBOSOME / Entity ID: all / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 7.6
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 2.5 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 73661 / Symmetry type: POINT

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