4m6f | pdb_00004m6f

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

spinqualitylabelsall models 4m6f, resolution 4.99Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4m6f is a 3 chain structure with sequence from Bpmu. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 3uj3, 1gdt, 3pkz Resources: FirstGlance, OCA, RCSB, PDBsum Function [DNIV_BPMU] This protein catalyzes the inversion of a 3000-bp segment of phage DNA. The inversion results in a modification of the 3'-end of the tail fiber gene and alters the host specificity. Publication Abstract from PubMed 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 A. 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. Exploiting large non-isomorphous differences for phase determination of a G-segment invertase-DNA complex.,Ritacco CJ, Steitz TA, Wang J Acta Crystallogr D Biol Crystallogr. 2014 Mar;70(Pt 3):685-93. doi:, 10.1107/S1399004713032392. Epub 2014 Feb 15. PMID:24598738 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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