5HNF

Crystal structure of pyrene- and phenanthrene-modified DNA in complex with the BpuJ1 endonuclease binding domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 

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Literature

Structural insight into DNA-assembled oligochromophores: crystallographic analysis of pyrene- and phenanthrene-modified DNA in complex with BpuJI endonuclease.

Probst, M.Aeschimann, W.Chau, T.T.Langenegger, S.M.Stocker, A.Haner, R.

(2016) Nucleic Acids Res 44: 7079-7089

  • DOI: 10.1093/nar/gkw644
  • Primary Citation of Related Structures:  
    5HLT, 5HNF, 5HNH

  • PubMed Abstract: 
  • The use of the DNA duplex as a supramolecular scaffold is an established approach for the assembly of chromophore aggregates. In the absence of detailed structural insight, the characterization of thus assembled oligochromophores is, today, largely based on solution-phase spectroscopy ...

    The use of the DNA duplex as a supramolecular scaffold is an established approach for the assembly of chromophore aggregates. In the absence of detailed structural insight, the characterization of thus assembled oligochromophores is, today, largely based on solution-phase spectroscopy. Here, we describe the crystal structures of three DNA-organized chromophore aggregates. DNA hybrids containing non-nucleosidic pyrene and phenanthrene building blocks were co-crystallized with the recently described binding domain of the restriction enzyme BpuJI. Crystal structures of these complexes were determined at 2.7, 1.9 and 1.6 Å resolutions. The structures reveal aromatic stacking interactions between pyrene and/or phenanthrene units within the framework of the B-DNA duplex. In hybrids containing a single modification in each DNA strand near the end of the duplex, the two polyaromatic hydrocarbons are engaged in a face-to-face stacking orientation. Due to crystal packing and steric effects, the terminal GC base pair is disrupted in all three crystal structures, which results in a non-perfect stacking arrangement of the aromatic chromophores in two of the structures. In a hybrid containing a total of three pyrenes, crystal lattice induced end-to-end stacking of individual DNA duplexes leads to the formation of an extended aromatic π-stack containing four co-axially arranged pyrenes. The aromatic planes of the stacked pyrenes are oriented in a parallel way. The study demonstrates the value of co-crystallization of chemically modified DNA with the recombinant binding domain of the restriction enzyme BpuJI for obtaining detailed structural insight into DNA-assembled oligochromophores.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland robert.haener@dcb.unibe.ch.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Restriction endonuclease R.BpuJIA288Bacillus pumilusMutation(s): 0 
Gene Names: bpuJIR
UniProt
Find proteins for A3FMN7 (Bacillus pumilus)
Explore A3FMN7 
Go to UniProtKB:  A3FMN7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA3FMN7
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(*GP*(YPE)P*AP*CP*CP*CP*GP*TP*GP*GP*A)-3')B [auth L]11synthetic construct
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (5'-D(*TP*CP*CP*AP*CP*GP*GP*GP*TP*(YPF)P*C)-3')C [auth M]11synthetic construct
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 165.723α = 90
b = 59.278β = 94.2
c = 44.048γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-17
    Type: Initial release
  • Version 1.1: 2016-09-14
    Changes: Database references