7ABH

Human pre-Bact-2 spliceosome (SF3b/U2 snRNP portion)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 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

Mechanism of protein-guided folding of the active site U2/U6 RNA during spliceosome activation.

Townsend, C.Leelaram, M.N.Agafonov, D.E.Dybkov, O.Will, C.L.Bertram, K.Urlaub, H.Kastner, B.Stark, H.Luhrmann, R.

(2020) Science 370

  • DOI: 10.1126/science.abc3753
  • Primary Citation of Related Structures:  
    7AAV, 7ABI, 7ABH, 7ABG, 7ABF

  • PubMed Abstract: 
  • Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway of the latter and the mechanism whereby proteins aid its proper folding ...

    Spliceosome activation involves extensive protein and RNA rearrangements that lead to formation of a catalytically active U2/U6 RNA structure. At present, little is known about the assembly pathway of the latter and the mechanism whereby proteins aid its proper folding. Here, we report the cryo-electron microscopy structures of two human, activated spliceosome precursors (that is, pre-B act complexes) at core resolutions of 3.9 and 4.2 angstroms. These structures elucidate the order of the numerous protein exchanges that occur during activation, the mutually exclusive interactions that ensure the correct order of ribonucleoprotein rearrangements needed to form the U2/U6 catalytic RNA, and the stepwise folding pathway of the latter. Structural comparisons with mature B act complexes reveal the molecular mechanism whereby a conformational change in the scaffold protein PRP8 facilitates final three-dimensional folding of the U2/U6 catalytic RNA.


    Organizational Affiliation

    Cellular Biochemistry, MPI for Biophysical Chemistry, Am Fassberg 11, D-37077 Göttingen, Germany. reinhard.luehrmann@mpibpc.mpg.de hstark1@gwdg.de b.kastner@mpibpc.mpg.de.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division cycle 5-like proteinA [auth L]802Homo sapiensMutation(s): 0 
Gene Names: CDC5LKIAA0432PCDC5RP
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PHD finger-like domain-containing protein 5AB [auth y]110Homo sapiensMutation(s): 0 
Gene Names: PHF5A
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Find proteins for Q7RTV0 (Homo sapiens)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3A subunit 2D [auth F]464Homo sapiensMutation(s): 0 
Gene Names: SF3A2SAP62
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Find proteins for Q15428 (Homo sapiens)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3A subunit 3E [auth 4]501Homo sapiensMutation(s): 0 
Gene Names: SF3A3SAP61
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 1F [auth u]1304Homo sapiensMutation(s): 0 
Gene Names: SF3B1SAP155
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 2G [auth T]895Homo sapiensMutation(s): 0 
Gene Names: SF3B2SAP145
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 3H [auth E]1217Homo sapiensMutation(s): 0 
Gene Names: SF3B3KIAA0017SAP130
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 4I [auth w]424Homo sapiensMutation(s): 0 
Gene Names: SF3B4SAP49
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 5J [auth x]86Homo sapiensMutation(s): 0 
Gene Names: SF3B5SF3B10
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Splicing factor 3B subunit 6K [auth z]125Homo sapiensMutation(s): 0 
Gene Names: SF3B6SAP14SF3B14SF3B14ACGI-110HSPC175HT006
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Smad nuclear-interacting protein 1L [auth 0]396Homo sapiensMutation(s): 0 
Gene Names: SNIP1
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-binding motif protein, X-linked 2M [auth 1]322Homo sapiensMutation(s): 0 
Gene Names: RBMX2CGI-79
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/arginine repetitive matrix protein 1N [auth Y]904Homo sapiensMutation(s): 0 
Gene Names: SRRM1SRM160
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
DNA/RNA-binding protein KIN17P [auth 7]393Homo sapiensMutation(s): 0 
Gene Names: KINBTCDKIN17
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Entity ID: 3
MoleculeChainsLengthOrganismImage
MINX M3 pre-mRNAC [auth Z]230synthetic construct
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Entity ID: 15
MoleculeChainsLengthOrganismImage
U2 snRNAO [auth 2]188Homo sapiens
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)Germany860

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-09
    Type: Initial release
  • Version 1.1: 2020-12-30
    Changes: Database references