11AA | pdb_000011aa

Yeast co-transcriptional pre-60S assembly intermediate Nop12 RNP

  • Classification: RIBOSOME
  • Organism(s): Saccharomyces cerevisiae S288C
  • Mutation(s): No 

  • Deposited: 2026-02-13 Released: 2026-07-01 
  • Deposition Author(s): Piwowarczyk, R., Klinge, S.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Chan Zuckerberg Initiative

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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Literature

Mechanism for the initiation of co-transcriptional pre-60 S assembly.

Piwowarczyk, R., Klinge, S.

(2026) bioRxiv 

  • DOI: https://doi.org/10.64898/2026.05.22.727207
  • Primary Citation Related Structures: 
    10ZY, 10ZZ, 11AA

  • PubMed Abstract: 

    Eukaryotic ribosomal large subunit (60 S ) assembly requires an internal transcribed spacer 2 (ITS2) to license both nucleolar and nuclear pre-60 S assembly intermediates. The underlying molecular mechanisms responsible for nucleation of pre-60 S assembly, quality control, and installation of ITS2 during co-transcriptional stages remain unknown. Here we report the earliest co-transcriptional assembly intermediates of the eukaryotic 60 S subunits. Together with biochemical assays, our data reveal the architecture of co-transcriptional pre-60 S assembly initiation and progression, as well as the molecular logic of an assembly checkpoint. This study highlights an evolutionary solution by which complex RNA folding processes can be parallelized and integrated via biological AND-gating.

Macromolecule Content 

  • Total Structure Weight: 1,795.11 kDa 
  • Atom Count: 29,525 
  • Modeled Residue Count: 3,047 
  • Deposited Residue Count: 8,789 
  • Unique protein chains: 14
  • Unique nucleic acid chains: 3

Macromolecules


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Entity ID: 4
MoleculeChains  Sequence LengthOrganismDetailsImage
Nucleolar protein 16D [auth 7]231Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P40007 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 5
MoleculeChains  Sequence LengthOrganismDetailsImage
60S ribosomal protein L8-AE [auth G]256Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P17076 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 6
MoleculeChains  Sequence LengthOrganismDetailsImage
Nucleolar protein 12F [auth H]459Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for Q08208 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 7
MoleculeChains  Sequence LengthOrganismDetailsImage
Proteasome-interacting protein CIC1G [auth K]376Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P38779 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 8
MoleculeChains  Sequence LengthOrganismDetailsImage
60S ribosomal protein L13-AH [auth L]199Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for Q12690 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 9
MoleculeChains  Sequence LengthOrganismDetailsImage
60S ribosomal protein L15-AI [auth N]204Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P05748 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Reference Sequence
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Entity ID: 10
MoleculeChains  Sequence LengthOrganismDetailsImage
Ribosome biogenesis protein BRX1J [auth b]291Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for Q08235 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 11
MoleculeChains  Sequence LengthOrganismDetailsImage
60S ribosomal protein L36-AK [auth i]100Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 12
MoleculeChains  Sequence LengthOrganismDetailsImage
rRNA-processing protein EBP2L [auth m]427Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P36049 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 13
MoleculeChains  Sequence LengthOrganismDetailsImage
Pescadillo homologM [auth n]605Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
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Entity ID: 14
MoleculeChains  Sequence LengthOrganismDetailsImage
Ribosome biogenesis protein 15N [auth o]220Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P53927 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 15
MoleculeChains  Sequence LengthOrganismDetailsImage
ATP-dependent RNA helicase HAS1O [auth p]505Saccharomyces cerevisiae S288CMutation(s): 0 
EC: 3.6.4.13
UniProt
Find proteins for Q03532 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 16
MoleculeChains  Sequence LengthOrganismDetailsImage
Ribosome biogenesis protein ERB1P [auth s]807Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for Q04660 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 17
MoleculeChains  Sequence LengthOrganismDetailsImage
Ribosome biogenesis protein RLP7Q [auth t]322Saccharomyces cerevisiae S288CMutation(s): 0 
UniProt
Find proteins for P40693 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Reference Sequence
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Entity ID: 1
MoleculeChains LengthOrganismImage
25S ribosomal RNAA [auth 1]3,396Saccharomyces cerevisiae S288C
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Entity ID: 2
MoleculeChains LengthOrganismImage
5.8S ribosomal RNAB [auth 2]159Saccharomyces cerevisiae S288C
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Entity ID: 3
MoleculeChains LengthOrganismImage
Internal transcribed spacer 2 ITS2C [auth 3]232Saccharomyces cerevisiae S288C
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Reference Sequence

Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC
MODEL REFINEMENTISOLDE
MODEL REFINEMENTPHENIX1.19.1_4122

Structure Validation

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Entry History 

& Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States5R01GM145950-03
Chan Zuckerberg InitiativeUnited States2023-332391

Revision History  (Full details and data files)

  • Version 1.0: 2026-07-01
    Type: Initial release