1IJW image
Entry Detail
PDB ID:
1IJW
Title:
Testing the Water-Mediated Hin Recombinase DNA Recognition by Systematic Mutations.
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2001-04-30
Release Date:
2002-02-22
Method Details:
Experimental Method:
Resolution:
2.40 Å
R-Value Free:
0.27
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
C 2 2 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:DNA-INVERTASE HIN
Chain IDs:C
Chain Length:52
Number of Molecules:1
Biological Source:
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
CBR B DC ?
Ligand Molecules
Primary Citation
Testing water-mediated DNA recognition by the Hin recombinase.
EMBO J. 21 801 814 (2002)
PMID: 11847127 DOI: 10.1093/emboj/21.4.801

Abstact

The Hin recombinase specifically recognizes its DNA-binding site by means of both major and minor groove interactions. A previous X-ray structure, together with new structures of the Hin DNA-binding domain bound to a recombination half-site that were solved as part of the present study, have revealed that two ordered water molecules are present within the major groove interface. In this report, we test the importance of these waters directly by X-ray crystal structure analysis of complexes with four mutant DNA sequences. These structures, combined with their Hin-binding properties, provide strong support for the critical importance of one of the intermediate waters. A lesser but demonstrable role is ascribed to the second water molecule. The mutant structures also illustrate the prominent roles of thymine methyls both in stabilizing intermediate waters and in interfering with water or amino acid side chain interactions with DNA.

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Primary Citation of related structures