1ofx | pdb_00001ofx

CRYSTAL STRUCTURE OF AN OKAZAKI FRAGMENT AT 2 ANGSTROMS RESOLUTION

spinqualitylabelsall models 1ofx, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ofx is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: SPM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed In DNA replication, Okazaki fragments are formed as double-stranded intermediates during synthesis of the lagging strand. They are composed of the growing DNA strand primed by RNA and the template strand. The DNA oligonucleotide d(GGGTATACGC) and the chimeric RNA-DNA oligonucleotide r(GCG)d(TATACCC) were combined to form a synthetic Okazaki fragment and its three-dimensional structure was determined by x-ray crystallography. The fragment adopts an overall A-type conformation with 11 residues per turn. Although the base-pair geometry, particularly in the central TATA part, is distorted, there is no evidence for a transition from the A- to the B-type conformation at the junction between RNA.DNA hybrid and DNA duplex. The RNA trimer may, therefore, lock the complete fragment in an A-type conformation. Crystal structure of an Okazaki fragment at 2-A resolution.,Egli M, Usman N, Zhang SG, Rich A Proc Natl Acad Sci U S A. 1992 Jan 15;89(2):534-8. PMID:1370582 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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