4PY5

Thermovibrio ammonificans RNase H3 in complex with 19-mer RNA/DNA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.186 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structure of RNase H3-substrate complex reveals parallel evolution of RNA/DNA hybrid recognition.

Figiel, M., Nowotny, M.

(2014) Nucleic Acids Res 42: 9285-9294

  • DOI: 10.1093/nar/gku615
  • Primary Citation of Related Structures:  
    4PY5

  • PubMed Abstract: 

    • RNases H participate in the replication and maintenance of genomic DNA. RNase H1 cleaves the RNA strand of RNA/DNA hybrids, and RNase H2 in addition hydrolyzes the RNA residue of RNA-DNA junctions. RNase H3 is structurally closely related to RNases H2, but its biochemical properties are similar to type 1 enzymes ...

    RNases H participate in the replication and maintenance of genomic DNA. RNase H1 cleaves the RNA strand of RNA/DNA hybrids, and RNase H2 in addition hydrolyzes the RNA residue of RNA-DNA junctions. RNase H3 is structurally closely related to RNases H2, but its biochemical properties are similar to type 1 enzymes. Its unique N-terminal substrate-binding domain (N-domain) is related to TATA-binding protein. Here, we report the first crystal structure of RNase H3 in complex with its RNA/DNA substrate. Just like RNases H1, type 3 enzyme recognizes the 2'-OH groups of the RNA strand and detects the DNA strand by binding a phosphate group and inducing B-form conformation. Moreover, the N-domain recognizes RNA and DNA in a manner that is highly similar to the hybrid-binding domain of RNases H1. Our structure demonstrates a remarkable example of parallel evolution of the elements used in the specific recognition of RNA and DNA.

    Organizational Affiliation: 

    Laboratory of Protein Structure, International Institute of Molecular and Cell Biology, 4 Trojdena Street, 02-109 Warsaw, Poland mnowotny@iimcb.gov.pl.



Macromolecules

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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RibonucleaseA271Thermovibrio ammonificans HB-1Mutation(s): 1 
Gene Names: Theam_0945
EC: 3.1.26 (PDB Primary Data), 3.1.26.4 (UniProt)
UniProt
Find proteins for E8T217 (Thermovibrio ammonificans (strain DSM 15698 / JCM 12110 / HB-1))
Explore E8T217 
Go to UniProtKB:  E8T217
Protein Feature View
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  • Reference Sequence
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    • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    5'-R(*GP*AP*GP*UP*GP*CP*GP*AP*CP*AP*CP*CP*UP*GP*AP*UP*UP*CP*C)-3'B19N/A
    Protein Feature View
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    • Reference Sequence
    • Find similar nucleic acids by:  Sequence   |   Structure
      • Entity ID: 3
      MoleculeChainsLengthOrganismImage
      5'-D(*GP*GP*AP*AP*TP*CP*AP*GP*GP*TP*GP*TP*CP*GP*CP*AP*CP*TP*C)-3'C19N/A
      Protein Feature View
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      • Reference Sequence
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.10 Å
      • R-Value Free: 0.233 
      • R-Value Work: 0.183 
      • R-Value Observed: 0.186 
      • Space Group: P 21 21 21
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 58.449α = 90
      b = 67.661β = 90
      c = 107.514γ = 90
      Software Package:
      Software NamePurpose
      PHENIXmodel building
      PHENIXrefinement
      XDSdata reduction
      XDSdata scaling
      PHENIXphasing

      Structure Validation

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      View more in-depth experimental data

      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2014-07-30
        Type: Initial release
      • Version 1.1: 2014-08-27
        Changes: Database references
      • Version 1.2: 2014-10-29
        Changes: Structure summary