5oqo

Crystal structure of the S. cerevisiae condensin Ycg1-Brn1 subcomplex bound to DNA (crystal form II)

spinqualitylabelsall models 5oqo, resolution 3.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5oqo is a 4 chain structure with sequence from Saccharomyces cerevisiae S288C and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.25Å Ligands: PGE, TRS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CND3_YEAST Regulatory subunit of the condensin complex, a complex required for conversion of interphase chromatin into mitotic-like condense chromosomes. The condensin complex probably introduces positive supercoils into relaxed DNA in the presence of type I topoisomerases and converts nicked DNA into positive knotted forms in the presence of type II topoisomerases. The condensin complex probably also plays a role during interphase. Publication Abstract from PubMed Condensin protein complexes coordinate the formation of mitotic chromosomes and thereby ensure the successful segregation of replicated genomes. Insights into how condensin complexes bind to chromosomes and alter their topology are essential for understanding the molecular principles behind the large-scale chromatin rearrangements that take place during cell divisions. Here, we identify a direct DNA-binding site in the eukaryotic condensin complex, which is formed by its Ycg1Cnd3 HEAT-repeat and Brn1Cnd2 kleisin subunits. DNA co-crystal structures reveal a conserved, positively charged groove that accommodates the DNA double helix. A peptide loop of the kleisin subunit encircles the bound DNA and, like a safety belt, prevents its dissociation. Firm closure of the kleisin loop around DNA is essential for the association of condensin complexes with chromosomes and their DNA-stimulated ATPase activity. Our data suggest a sophisticated molecular basis for anchoring condensin complexes to chromosomes that enables the formation of large-sized chromatin loops. Structural Basis for a Safety-Belt Mechanism That Anchors Condensin to Chromosomes.,Kschonsak M, Merkel F, Bisht S, Metz J, Rybin V, Hassler M, Haering CH Cell. 2017 Oct 4. pii: S0092-8674(17)31057-7. doi: 10.1016/j.cell.2017.09.008. PMID:28988770 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Condensin

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