6AR5

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.413 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.185 

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

  • 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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
DNAA13synthetic construct
Entity ID: 2
MoleculeChainsLengthOrganism
RNAB14synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.413 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.185 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 46.428α = 90.00
b = 46.428β = 90.00
c = 82.195γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PHASERphasing
XDSdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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