7APK

Structure of the human THO - UAP56 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Structure of the human core transcription-export complex reveals a hub for multivalent interactions.

Puhringer, T.Hohmann, U.Fin, L.Pacheco-Fiallos, B.Schellhaas, U.Brennecke, J.Plaschka, C.

(2020) Elife 9

  • DOI: 10.7554/eLife.61503
  • Primary Citation of Related Structures:  
    7APK

  • PubMed Abstract: 
  • The export of mRNA from nucleus to cytoplasm requires the conserved and essential transcription and export (TREX) complex (THO-UAP56/DDX39B-ALYREF). TREX selectively binds mRNA maturation marks and licenses mRNA for nuclear export by loading the export factor NXF1-NXT1 ...

    The export of mRNA from nucleus to cytoplasm requires the conserved and essential transcription and export (TREX) complex (THO-UAP56/DDX39B-ALYREF). TREX selectively binds mRNA maturation marks and licenses mRNA for nuclear export by loading the export factor NXF1-NXT1. How TREX integrates these marks and achieves high selectivity for mature mRNA is poorly understood. Here, we report the cryo-electron microscopy structure of the human THO-UAP56/DDX39B complex at 3.3 Å resolution. The seven-subunit THO-UAP56/DDX39B complex multimerizes into a 28-subunit tetrameric assembly, suggesting that selective recognition of mature mRNA is facilitated by the simultaneous sensing of multiple, spatially distant mRNA regions and maturation marks. Two UAP56/DDX39B RNA helicases are juxtaposed at each end of the tetramer, which would allow one bivalent ALYREF protein to bridge adjacent helicases and regulate the TREX-mRNA interaction. Our structural and biochemical results suggest a conserved model for TREX complex function that depends on multivalent interactions between proteins and mRNA.


    Organizational Affiliation

    Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 1A, H [auth I], P [auth a], W [auth i]711Homo sapiensMutation(s): 0 
Gene Names: THOC1HPR1
Find proteins for Q96FV9 (Homo sapiens)
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PHAROS:  Q96FV9
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 2B, I [auth J], Q [auth b], X [auth j]1226Homo sapiensMutation(s): 0 
Gene Names: THOC2CXorf3
Find proteins for Q8NI27 (Homo sapiens)
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PHAROS:  Q8NI27
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 3C, J [auth K], R [auth c], Y [auth k]395Homo sapiensMutation(s): 0 
Gene Names: THOC3
Find proteins for Q96J01 (Homo sapiens)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 5 homologD [auth E], K [auth M], S [auth e], Z [auth m]683Homo sapiensMutation(s): 0 
Gene Names: THOC5C22orf19KIAA0983
Find proteins for Q13769 (Homo sapiens)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 6 homologE [auth F], L [auth N], T [auth f], AA [auth n]341Homo sapiensMutation(s): 0 
Gene Names: THOC6WDR58PSEC0006
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
THO complex subunit 7 homologF [auth G], M [auth O], U [auth g], BA [auth o]204Homo sapiensMutation(s): 0 
Gene Names: THOC7NIF3L1BP1
Find proteins for Q6I9Y2 (Homo sapiens)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Spliceosome RNA helicase DDX39BG [auth H], N [auth P], V [auth h], CA [auth p]451Homo sapiensMutation(s): 0 
Gene Names: DDX39BBAT1UAP56
EC: 3.6.4.13
Find proteins for Q13838 (Homo sapiens)
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
THOC2 anchor (putative)O [auth X], DA [auth x]37Homo sapiensMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 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 FoundationAustriaP2GEP3_188343

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-16
    Type: Initial release