6SG9

Head domain of the mt-SSU assemblosome from Trypanosoma brucei


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Mitoribosomal small subunit biogenesis in trypanosomes involves an extensive assembly machinery.

Saurer, M.Ramrath, D.J.F.Niemann, M.Calderaro, S.Prange, C.Mattei, S.Scaiola, A.Leitner, A.Bieri, P.Horn, E.K.Leibundgut, M.Boehringer, D.Schneider, A.Ban, N.

(2019) Science 365: 1144-1149

  • DOI: 10.1126/science.aaw5570
  • Primary Citation of Related Structures:  
    6SG9, 6SGA, 6SGB

  • PubMed Abstract: 
  • Mitochondrial ribosomes (mitoribosomes) are large ribonucleoprotein complexes that synthesize proteins encoded by the mitochondrial genome. An extensive cellular machinery responsible for ribosome assembly has been described only for eukaryotic cytosolic ribosomes ...

    Mitochondrial ribosomes (mitoribosomes) are large ribonucleoprotein complexes that synthesize proteins encoded by the mitochondrial genome. An extensive cellular machinery responsible for ribosome assembly has been described only for eukaryotic cytosolic ribosomes. Here we report that the assembly of the small mitoribosomal subunit in Trypanosoma brucei involves a large number of factors and proceeds through the formation of assembly intermediates, which we analyzed by using cryo-electron microscopy. One of them is a 4-megadalton complex, referred to as the small subunit assemblosome, in which we identified 34 factors that interact with immature ribosomal RNA (rRNA) and recognize its functionally important regions. The assembly proceeds through large-scale conformational changes in rRNA coupled with successive incorporation of mitoribosomal proteins, providing an example for the complexity of the ribosomal assembly process in mitochondria.


    Organizational Affiliation

    Department of Biology, Institute of Molecular Biology and Biophysics, ETH Zurich, Otto-Stern-Weg 5, CH-8093 Zurich, Switzerland. andre.schneider@dcb.unibe.ch ban@mol.biol.ethz.ch.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
uS5mA [auth CE]435Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 2
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uS11mB [auth CK]326Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 3
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mS38C [auth Cn]250Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 4
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mt-SAF18D [auth FJ]362Trypanosoma brucei bruceiMutation(s): 0 
UniProt
Find proteins for D0A8R9 (Trypanosoma brucei gambiense (strain MHOM/CI/86/DAL972))
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Entity ID: 5
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mt-SAF28E [auth FY]188Trypanosoma brucei bruceiMutation(s): 0 
UniProt
Find proteins for A0A3L6L5M9 (Trypanosoma brucei equiperdum)
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
mt-SAF30F [auth Fa]171Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 8
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uS3mH [auth CC]74Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 9
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uS9mI [auth CI]443Trypanosoma brucei bruceiMutation(s): 0 
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uS10mJ [auth CJ]817Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 11
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uS14mK [auth CN]166Trypanosoma brucei bruceiMutation(s): 0 
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uS19mL [auth CS]244Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 13
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mS29M [auth Cg]498Trypanosoma brucei bruceiMutation(s): 0 
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mS33N [auth Ci]181Trypanosoma brucei bruceiMutation(s): 0 
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mS35O [auth Ck]874Trypanosoma brucei bruceiMutation(s): 0 
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mS49P [auth DB]1181Trypanosoma brucei bruceiMutation(s): 0 
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mS50Q [auth DC]1165Trypanosoma brucei bruceiMutation(s): 0 
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mS52R [auth DE]747Trypanosoma brucei bruceiMutation(s): 0 
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mS53S [auth DF]666Trypanosoma brucei bruceiMutation(s): 0 
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mS54T [auth DG]631Trypanosoma brucei bruceiMutation(s): 0 
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mS55 (KRIPP8)U [auth DH]581Trypanosoma brucei bruceiMutation(s): 0 
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mS57V [auth DJ]396Trypanosoma brucei bruceiMutation(s): 0 
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mS58W [auth DK]324Trypanosoma brucei bruceiMutation(s): 0 
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mS67X [auth DT]247Trypanosoma brucei bruceiMutation(s): 0 
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mS69Y [auth DV]183Trypanosoma brucei bruceiMutation(s): 0 
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mS70Z [auth DW]179Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 27
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mS71AA [auth DX]169Trypanosoma brucei bruceiMutation(s): 0 
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mS72BA [auth DY]163Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF1 (RSM22)CA [auth F1]1041Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF4DA [auth F4]811Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF12 (KRIPP18)EA [auth FD]579Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF14FA [auth FF]474Trypanosoma brucei bruceiMutation(s): 0 
EC: 2.1.1
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mt-SAF15GA [auth FG]463Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF16HA [auth FH]457Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF17IA [auth FI]445Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF19JA [auth FK]372Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF20KA [auth FL]353Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF25LA [auth FV]264Trypanosoma brucei bruceiMutation(s): 0 
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mt-SAF34MA [auth Fe]123Trypanosoma brucei bruceiMutation(s): 0 
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UNK-aNA [auth Ua]70Trypanosoma brucei bruceiMutation(s): 0 
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UNK-bOA [auth Ub]42Trypanosoma brucei bruceiMutation(s): 0 
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UNK-cPA [auth Uc]12Trypanosoma brucei bruceiMutation(s): 0 
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UNK-dQA [auth Ud]59Trypanosoma brucei bruceiMutation(s): 0 
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UNK-eRA [auth Ue]29Trypanosoma brucei bruceiMutation(s): 0 
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UNK-fSA [auth Uf]9Trypanosoma brucei bruceiMutation(s): 0 
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UNK-gTA [auth Ug]167Trypanosoma brucei bruceiMutation(s): 0 
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UNK-hUA [auth Uh]255Trypanosoma brucei bruceiMutation(s): 0 
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UNK-iVA [auth Ui]32Trypanosoma brucei bruceiMutation(s): 0 
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UNK-jWA [auth Uj]19Trypanosoma brucei bruceiMutation(s): 0 
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UNK-kXA [auth Uk]27Trypanosoma brucei bruceiMutation(s): 0 
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UNK-lYA [auth Ul]14Trypanosoma brucei bruceiMutation(s): 0 
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UNK-mZA [auth Um]11Trypanosoma brucei bruceiMutation(s): 0 
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UNK-xAB [auth Ux]108Trypanosoma brucei bruceiMutation(s): 0 
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Entity ID: 7
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9S rRNAG [auth CA]802Trypanosoma brucei brucei
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland--

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-18
    Type: Initial release
  • Version 1.1: 2019-09-25
    Changes: Data collection, Database references