6qj2

Crystal structure of the C. thermophilum condensin Smc4 ATPase head in complex with the C-terminal domain of Brn1

spinqualitylabelsall models 6qj2, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6qj2 is a 2 chain structure with sequence from Chaetomium thermophilum var. thermophilum DSM 1495. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Ligands: SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function G0S2G2_CHATD Publication Abstract from PubMed The condensin protein complex plays a key role in the structural organization of genomes. How the ATPase activity of its SMC subunits drives large-scale changes in chromosome topology has remained unknown. Here we reconstruct, at near-atomic resolution, the sequence of events that take place during the condensin ATPase cycle. We show that ATP binding induces a conformational switch in the Smc4 head domain that releases its hitherto undescribed interaction with the Ycs4 HEAT-repeat subunit and promotes its engagement with the Smc2 head into an asymmetric heterodimer. SMC head dimerization subsequently enables nucleotide binding at the second active site and disengages the Brn1 kleisin subunit from the Smc2 coiled coil to open the condensin ring. These large-scale transitions in the condensin architecture lay out a mechanistic path for its ability to extrude DNA helices into large loop structures. Structural Basis of an Asymmetric Condensin ATPase Cycle.,Hassler M, Shaltiel IA, Kschonsak M, Simon B, Merkel F, Tharichen L, Bailey HJ, Macosek J, Bravo S, Metz J, Hennig J, Haering CH Mol Cell. 2019 Jun 20;74(6):1175-1188.e9. doi: 10.1016/j.molcel.2019.03.037. PMID:31226277 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Condensin

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