4XM5 image
Entry Detail
PDB ID:
4XM5
Keywords:
Title:
C. glabrata Slx1.
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2015-01-14
Release Date:
2015-03-25
Method Details:
Experimental Method:
Resolution:
2.34 Å
R-Value Free:
0.25
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 43 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Structure-specific endonuclease subunit SLX1
Chain IDs:A
Chain Length:312
Number of Molecules:1
Biological Source:Candida glabrata
Primary Citation
Structural and Mechanistic Analysis of the Slx1-Slx4 Endonuclease.
Cell Rep 10 1467 1476 (2015)
PMID: 25753413 DOI: 10.1016/j.celrep.2015.02.019

Abstact

The SLX1-SLX4 endonuclease required for homologous recombination and DNA repair in eukaryotic cells cleaves a variety of branched DNA structures. The nuclease subunit SLX1 is activated by association with a scaffolding protein SLX4. At the present time, little is known about the structure of SLX1-SLX4 or its mechanism of action. Here, we report the structural insights into SLX1-SLX4 by detailing the crystal structure of Candida glabrata (Cg) Slx1 alone and in combination with the C-terminal region of Slx4. The structure of Slx1 reveals a compact arrangement of the GIY-YIG nuclease and RING domains, which is reinforced by a long α helix. Slx1 forms a stable homodimer that blocks its active site. Slx1-Slx4 interaction is mutually exclusive with Slx1 homodimerization, suggesting a mechanism for Slx1 activation by Slx4.

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