3glp

1.23 A resolution X-ray structure of (GCUGCUGC)2

spinqualitylabelsall models 3glp, resolution 1.23Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3glp is a 5 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.23Å Ligands: GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Tracks containing CUG repeats are abundant in human gene transcripts. Their biological role includes modulation of pre-mRNA splicing, mRNA transport and regulation of translation. Expanded forms of CUG runs are associated with pathogenesis of several neurodegenerative diseases, including myotonic dystrophy type 1. We have analysed two crystal structures of RNA duplexes containing the CUG repeats: G(CUG)(2)C and (CUG)(6). The first of the structures, analysed at 1.23 A resolution, is of an oligomer designed by us. The second model was obtained after 'detwinning' the 1.58 A X-ray data previously deposited in the PDB. The RNA duplexes are in the A-form in which all the C-G pairs form Watson-Crick interactions while all the uridine pairs can be described as U*U cis wobble having only one hydrogen bond between the bases. The residue, which accepts the H-bond, is inclined towards the minor groove. This previously unreported base pairing can be described as 'stretched U-U wobble'. The regular hydrogen-bonding pattern of interactions with the solvent, the electrostatic charge distribution and surface features indicate the ligand binding potential of the CUG tracks. Structural insights into CUG repeats containing the 'stretched U-U wobble': implications for myotonic dystrophy.,Kiliszek A, Kierzek R, Krzyzosiak WJ, Rypniewski W Nucleic Acids Res. 2009 Jul;37(12):4149-56. Epub 2009 May 11. PMID:19433512 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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