1muh

CRYSTAL STRUCTURE OF TN5 TRANSPOSASE COMPLEXED WITH TRANSPOSON END DNA

spinqualitylabelsall models 1muh, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1muh is a 3 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. This structure supersedes the now removed PDB entry 1f3i. The December 2006 RCSB PDB Molecule of the Month feature on Transposase by David S. Goodsell is 10.2210/rcsb_pdb/mom_2006_12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: MG, MN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [TN5P_ECOLX] Mediates transposition of transposon Tn5 by a 'cut and paste' mechanism. First, the monomeric transposase binds the 19 bp inverted DNA repeats flanking the transposon. Then, dimerization of the DNA-bound transposase creates a synaptic DNA complex. After nicking of the first DNA strand, excision of the transposon proceeds through a series of intermediates. The transposase then mediates the insertion of the transposon at a new site by strand transfer. The activity of the wild-type transposase is very low, and is further inhibited by dimerization with the transposase inhibitor (inh). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Genomic evolution has been profoundly influenced by DNA transposition, a process whereby defined DNA segments move freely about the genome. Transposition is mediated by transposases, and similar events are catalyzed by retroviral integrases such as human immunodeficiency virus-1 (HIV-1) integrase. Understanding how these proteins interact with DNA is central to understanding the molecular basis of transposition. We report the three-dimensional structure of prokaryotic Tn5 transposase complexed with Tn5 transposon end DNA determined to 2.3 angstrom resolution. The molecular assembly is dimeric, where each double-stranded DNA molecule is bound by both protein subunits, orienting the transposon ends into the active sites. This structure provides a molecular framework for understanding many aspects of transposition, including the binding of transposon end DNA by one subunit and cleavage by a second, cleavage of two strands of DNA by a single active site via a hairpin intermediate, and strand transfer into target DNA. Three-dimensional structure of the Tn5 synaptic complex transposition intermediate.,Davies DR, Goryshin IY, Reznikoff WS, Rayment I Science. 2000 Jul 7;289(5476):77-85. PMID:10884228 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Transposase

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