1m1a
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(New page: 200px<br /> <applet load="1m1a" size="450" color="white" frame="true" align="right" spinBox="true" caption="1m1a, resolution 2.65Å" /> '''LIGAND BINDING ALTE...)
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Revision as of 15:59, 12 November 2007
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LIGAND BINDING ALTERS THE STRUCTURE AND DYNAMICS OF NUCLEOSOMAL DNA
Overview
We determined the crystal structures of three nucleosome core particles in, complex with site-specific DNA-binding ligands, the pyrrole-imidazole, polyamides. While the structure of the histone octamer and its interaction, with the DNA remain unaffected by ligand binding, nucleosomal DNA, undergoes significant structural changes at the ligand-binding sites and, in adjacent regions to accommodate the ligands. Our findings suggest that, twist diffusion occurs over long distances through tightly bound, nucleosomal DNA. This may be relevant to the mechanism of ATP-dependent, and spontaneous nucleosome translocation, and to the effect of bound, factors on nucleosome dynamics.
About this Structure
1M1A is a Protein complex structure of sequences from Xenopus laevis with MN and IMT as ligands. Full crystallographic information is available from OCA.
Reference
Crystal structures of nucleosome core particles in complex with minor groove DNA-binding ligands., Suto RK, Edayathumangalam RS, White CL, Melander C, Gottesfeld JM, Dervan PB, Luger K, J Mol Biol. 2003 Feb 14;326(2):371-80. PMID:12559907
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