3CG7

Crystal structure of cell-death related nuclease 4 (CRN-4)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

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This is version 1.1 of the entry. See complete history. 


Literature

Crystal structure of CRN-4: implications for domain function in apoptotic DNA degradation

Hsiao, Y.-Y., Nakagawa, A., Shi, Z., Mitani, S., Xue, D., Yuan, H.S.

(2009) Mol Cell Biol 29: 448-457

  • DOI: 10.1128/MCB.01006-08
  • Primary Citation of Related Structures:  
    3CG7, 3CM5, 3CM6

  • PubMed Abstract: 

    • Cell death related nuclease 4 (CRN-4) is one of the apoptotic nucleases involved in DNA degradation in Caenorhabditis elegans. To understand how CRN-4 is involved in apoptotic DNA fragmentation, we analyzed CRN-4's biochemical properties, in vivo cell functions, and the crystal structures of CRN-4 in apo-form, Mn(2+)-bound active form, and Er(3+)-bound inactive form ...

    Cell death related nuclease 4 (CRN-4) is one of the apoptotic nucleases involved in DNA degradation in Caenorhabditis elegans. To understand how CRN-4 is involved in apoptotic DNA fragmentation, we analyzed CRN-4's biochemical properties, in vivo cell functions, and the crystal structures of CRN-4 in apo-form, Mn(2+)-bound active form, and Er(3+)-bound inactive form. CRN-4 is a dimeric nuclease with the optimal enzyme activity in cleaving double-stranded DNA in apoptotic salt conditions. Both mutational studies and the structures of the Mn(2+)-bound CRN-4 revealed the geometry of the functional nuclease active site in the N-terminal DEDDh domain. The C-terminal domain, termed the Zn-domain, contains basic surface residues ideal for nucleic acid recognition and is involved in DNA binding, as confirmed by deletion assays. Cell death analysis in C. elegans further demonstrated that both the nuclease active site and the Zn-domain are required for crn-4's function in apoptosis. Combining all of the data, we suggest a structural model where chromosomal DNA is bound at the Zn-domain and cleaved at the DEDDh nuclease domain in CRN-4 when the cell is undergoing apoptosis.

    Organizational Affiliation: 

    Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu, Taiwan, Republic of China.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell death-related nuclease 4A, B308Caenorhabditis elegansMutation(s): 0 
Gene Names: crn-4, AH9.2
EC: 3.1
Find proteins for Q10905 (Caenorhabditis elegans)
Explore Q10905 
Go to UniProtKB:  Q10905
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN
Download Ideal Coordinates CCD File 
 C [auth A], D [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.474α = 90
b = 165.379β = 90
c = 64.263γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
SHELXSphasing

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: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance