6AR3

Structure of a Thermostable Group II Intron Reverse Transcriptase with Template-Primer and Its Functional and Evolutionary Implications (RT/Duplex (Se-Met))


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.41 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.273 
  • R-Value Observed: 0.278 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of a Thermostable Group II Intron Reverse Transcriptase with Template-Primer and Its Functional and Evolutionary Implications.

Stamos, J.L.Lentzsch, A.M.Lambowitz, A.M.

(2017) Mol Cell 68: 926-939.e4

  • DOI: 10.1016/j.molcel.2017.10.024
  • Primary Citation of Related Structures:  
    6AR1, 6AR3, 6AR5

  • PubMed Abstract: 
  • Bacterial group II intron reverse transcriptases (RTs) function in both intron mobility and RNA splicing and are evolutionary predecessors of retrotransposon, telomerase, and retroviral RTs as well as the spliceosomal protein Prp8 in eukaryotes. Here ...

    Bacterial group II intron reverse transcriptases (RTs) function in both intron mobility and RNA splicing and are evolutionary predecessors of retrotransposon, telomerase, and retroviral RTs as well as the spliceosomal protein Prp8 in eukaryotes. Here we determined a crystal structure of a full-length thermostable group II intron RT in complex with an RNA template-DNA primer duplex and incoming deoxynucleotide triphosphate (dNTP) at 3.0-Å resolution. We find that the binding of template-primer and key aspects of the RT active site are surprisingly different from retroviral RTs but remarkably similar to viral RNA-dependent RNA polymerases. The structure reveals a host of features not seen previously in RTs that may contribute to distinctive biochemical properties of group II intron RTs, and it provides a prototype for many related bacterial and eukaryotic non-LTR retroelement RTs. It also reveals how protein structural features used for reverse transcription evolved to promote the splicing of both group II and spliceosomal introns.


    Organizational Affiliation

    Institute for Cellular and Molecular Biology and Department of Molecular Biosciences, University of Texas at Austin, Austin, TX 78712, USA. Electronic address: lambowitz@austin.utexas.edu.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GsI-IIC RTAD428Geobacillus stearothermophilusMutation(s): 0 
Gene Names: trt
Find proteins for E2GM63 (Geobacillus stearothermophilus)
Explore E2GM63 
Go to UniProtKB:  E2GM63
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    DNAB, E11synthetic construct
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      RNAC, F14synthetic construct
      Small Molecules
      Ligands 2 Unique
      IDChainsName / Formula / InChI Key2D Diagram3D Interactions
      DTP
      Query on DTP

      Download CCD File 
      A, D
      2'-DEOXYADENOSINE 5'-TRIPHOSPHATE
      C10 H16 N5 O12 P3
      SUYVUBYJARFZHO-RRKCRQDMSA-N
       Ligand Interaction
      MG
      Query on MG

      Download CCD File 
      A, D
      MAGNESIUM ION
      Mg
      JLVVSXFLKOJNIY-UHFFFAOYSA-N
       Ligand Interaction
      Modified Residues  1 Unique
      IDChainsTypeFormula2D DiagramParent
      MSE
      Query on MSE
      A,DL-PEPTIDE LINKINGC5 H11 N O2 SeMET
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 3.41 Å
      • R-Value Free: 0.324 
      • R-Value Work: 0.273 
      • R-Value Observed: 0.278 
      • Space Group: C 1 2 1
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 179.527α = 90
      b = 108.966β = 113.78
      c = 72.517γ = 90
      Software Package:
      Software NamePurpose
      REFMACrefinement
      Aimlessdata scaling
      PDB_EXTRACTdata extraction
      XDSdata reduction
      PHASERphasing

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History 

      • Version 1.0: 2017-11-29
        Type: Initial release
      • Version 1.1: 2017-12-20
        Changes: Database references