4M6F

Dimer of the G-Segment Invertase bound to a DNA substrate

Summary for 4M6F

• Entry DOI: 10.2210/pdb4m6f/pdb
• Related: 1GDT 3PKZ 3UJ3
• Descriptor: DNA-invertase, gix site analog (3 entities in total)
• Functional Keywords: helix-turn-helix, catalytic domain, dna binding domain, recombinase, hydrolase-dna complex, hydrolase/dna
• Biological source: Enterobacteria phage Mu; More
• Total number of polymer chains: 3
• Total formula weight: 32436.25

Authors

Ritacco, C.J.,Wang, J.,Steitz, T.A. (deposition date: 2013-08-09, release date: 2014-03-12, Last modification date: 2024-02-28)

Primary citation

Ritacco, C.J.,Steitz, T.A.,Wang, J.
Exploiting large non-isomorphous differences for phase determination of a G-segment invertase-DNA complex.
Acta Crystallogr.,Sect.D, 70:685-693, 2014

PubMed Abstract: Crystals of the G-segment invertase in complex with a 37-base-pair asymmetric DNA duplex substrate had an unusually high solvent content of 88% and diffracted to a maximal resolution of about 5.0 Å. These crystals exhibited a high degree of non-isomorphism and anisotropy, which presented a serious challenge for structure determination by isomorphous replacement. Here, a procedure of cross-crystal averaging is described that uses large non-isomorphous crystallographic data with a priori information of an approximate molecular boundary as determined from a minimal amount of experimental phase information. Using this procedure, high-quality experimental phases were obtained that have enabled it to be shown that the conformation of the bound substrate DNA duplex significantly differs from those of substrates bound in other serine recombinase-DNA complexes.

PubMed: 24598738
DOI: 10.1107/S1399004713032392

Experimental method

X-RAY DIFFRACTION (4.99 Å)