6JJI

Crystal structure of a two-quartet RNA parallel G-quadruplex complexed with the porphyrin TMPyP4 (1:1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Native de novo structural determinations of non-canonical nucleic acid motifs by X-ray crystallography at long wavelengths.

Zhang, Y.El Omari, K.Duman, R.Liu, S.Haider, S.Wagner, A.Parkinson, G.N.Wei, D.

(2020) Nucleic Acids Res 48: 9886-9898

  • DOI: https://doi.org/10.1093/nar/gkaa439
  • Primary Citation of Related Structures:  
    6JJF, 6JJH, 6JJI, 6TQI

  • PubMed Abstract: 

    Obtaining phase information remains a formidable challenge for nucleic acid structure determination. The introduction of an X-ray synchrotron beamline designed to be tunable to long wavelengths at Diamond Light Source has opened the possibility to native de novo structure determinations by the use of intrinsic scattering elements. This provides opportunities to overcome the limitations of introducing modifying nucleotides, often required to derive phasing information. In this paper, we build on established methods to generate new tools for nucleic acid structure determinations. We report on the use of (i) native intrinsic potassium single-wavelength anomalous dispersion methods (K-SAD), (ii) use of anomalous scattering elements integral to the crystallization buffer (extrinsic cobalt and intrinsic potassium ions), (iii) extrinsic bromine and intrinsic phosphorus SAD to solve complex nucleic acid structures. Using the reported methods we solved the structures of (i) Pseudorabies virus (PRV) RNA G-quadruplex and ligand complex, (ii) PRV DNA G-quadruplex, and (iii) an i-motif of human telomeric sequence. Our results highlight the utility of using intrinsic scattering as a pathway to solve and determine non-canonical nucleic acid motifs and reveal the variability of topology, influence of ligand binding, and glycosidic angle rearrangements seen between RNA and DNA G-quadruplexes of the same sequence.


  • Organizational Affiliation

    State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China.


Macromolecules

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
RNA (5'-R(*GP*GP*CP*UP*CP*GP*GP*CP*GP*GP*CP*GP*GP*A)-3')A [auth B]14Pseudorabies virus Ea
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 23.509α = 90
b = 29.244β = 90
c = 57.557γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-3000data reduction
HKL-3000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31672558

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-26
    Type: Initial release
  • Version 1.1: 2020-09-09
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.2: 2020-10-07
    Changes: Database references
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Refinement description