3KIO

mouse RNase H2 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of the mammalian RNase H2 complex provides insight into RNA:DNA hybrid processing to prevent immune dysfunction.

Shaban, N.M.Harvey, S.Perrino, F.W.Hollis, T.

(2010) J.Biol.Chem. 285: 3617-3624

  • DOI: 10.1074/jbc.M109.059048
  • Also Cited By: 3P5J

  • PubMed Abstract: 
  • The mammalian RNase H2 ribonuclease complex has a critical function in nucleic acid metabolism to prevent immune activation with likely roles in processing of RNA primers in Okazaki fragments during DNA replication, in removing ribonucleotides misins ...

    The mammalian RNase H2 ribonuclease complex has a critical function in nucleic acid metabolism to prevent immune activation with likely roles in processing of RNA primers in Okazaki fragments during DNA replication, in removing ribonucleotides misinserted by DNA polymerases, and in eliminating RNA.DNA hybrids during cell death. Mammalian RNase H2 is a heterotrimeric complex of the RNase H2A, RNase H2B, and RNase H2C proteins that are all required for proper function and activity. Mutations in the human RNase H2 genes cause Aicardi-Goutières syndrome. We have determined the crystal structure of the three-protein mouse RNase H2 enzyme complex to better understand the molecular basis of RNase H2 dysfunction in human autoimmunity. The structure reveals the intimately interwoven architecture of RNase H2B and RNase H2C that interface with RNase H2A in a complex ideally suited for nucleic acid binding and hydrolysis coupled to protein-protein interaction motifs that could allow for efficient participation in multiple cellular functions. We have identified four conserved acidic residues in the active site that are necessary for activity and suggest a two-metal ion mechanism of catalysis for RNase H2. An Okazaki fragment has been modeled into the RNase H2 nucleic acid binding site providing insight into the recognition of RNA.DNA junctions by the RNase H2. Further structural and biochemical analyses show that some RNase H2 disease-causing mutations likely result in aberrant protein-protein interactions while the RNase H2A subunit-G37S mutation appears to distort the active site accounting for the demonstrated substrate specificity modification.


    Organizational Affiliation

    Department of Biochemistry, Center for Structural Biology, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157, USA




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease H2 subunit A
A
301Mus musculusMutation(s): 0 
Gene Names: Rnaseh2a (Rnasehi)
EC: 3.1.26.4
Find proteins for Q9CWY8 (Mus musculus)
Go to UniProtKB:  Q9CWY8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease H2 subunit B
B
332Mus musculusMutation(s): 0 
Gene Names: Rnaseh2b (Dleu8)
Find proteins for Q80ZV0 (Mus musculus)
Go to UniProtKB:  Q80ZV0
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ribonuclease H2 subunit C
C
166Mus musculusMutation(s): 0 
Gene Names: Rnaseh2c (Ayp1)
Find proteins for Q9CQ18 (Mus musculus)
Go to UniProtKB:  Q9CQ18
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 279.287α = 90.00
b = 40.421β = 90.00
c = 67.820γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
MLPHAREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance