5G5P

Structure of the Saccharomyces cerevisiae TREX-2 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The Sac3 Tpr-Like Region in the Saccharomyces Cerevisiae Trex-2 Complex is More Extensive But Independent of the Cid Region

Aibara, S.Bai, X.C.Stewart, M.

(2016) J.Struct.Biol. 195: 316

  • DOI: 10.1016/j.jsb.2016.07.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Transcription-export complex 2 (TREX-2 complex) facilitates the localization of actively transcribing genes to the nuclear periphery and also functions to contribute to the generation of export-competent mRNPs through interactions with the general mR ...

    Transcription-export complex 2 (TREX-2 complex) facilitates the localization of actively transcribing genes to the nuclear periphery and also functions to contribute to the generation of export-competent mRNPs through interactions with the general mRNA nuclear export factor Mex67:Mtr2. The TREX-2 complex is based on a Sac3 scaffold to which Thp1, Sem1, Cdc31, and Sus1 bind. TREX-2 can be subdivided into two modules: one, in which Thp1 and Sem1 bind to the Sac3(M) region (residues ∼100-551), and the other in which Cdc31 and two Sus1 chains bind to the Sac3(CID) region (residues ∼710-805). Complementary structural analyses using X-ray crystallography, electron microscopy, and small-angle X-ray scattering of the Saccharomyces cerevisiae TREX-2 complex, expressed using Baculovirus-infected Sf9 cells, have indicated that the TPR-like repeats of the Sac3(M) region extend considerably further towards the N-terminus than previously thought, and also indicate that this region and Sac3(CID):Sus1:Cdc31 region of the S. cerevisiae complex are structurally independent. Although the density visible accounted for only ∼100kDa, a 5.3Å resolution cryo-EM reconstruction was obtained of the M-region of TREX-2 that showed an additional three putative α-helices extending towards the Sac3 N-terminus and these helices were also seen in a 4.9Å resolution structure obtained by X-ray crystallography.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, United Kingdom.,MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, United Kingdom. Electronic address: ms@mrc-lmb.cam.ac.uk.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NUCLEAR MRNA EXPORT PROTEIN SAC3
A
805Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SAC3 (LEP1)
Find proteins for P46674 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P46674
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NUCLEAR MRNA EXPORT PROTEIN THP1
B
455Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: THP1 (BUD29)
Find proteins for Q08231 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q08231
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
26S PROTEASOME COMPLEX SUBUNIT SEM1
C
89Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SEM1 (DSH1)
Find proteins for O94742 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: SEM1
Go to UniProtKB:  O94742
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
NUCLEAR MRNA EXPORT PROTEIN SAC3
D, E, F
805N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
D, E, F
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-11-23
    Type: Initial release
  • Version 1.1: 2016-11-30
    Type: Data collection
  • Version 1.2: 2016-12-14
    Type: Other
  • Version 1.3: 2018-07-18
    Type: Data collection