Transposase

From Proteopedia

Revision as of 10:06, 21 September 2016

spinqualitylabelsall models Structure of Tn5 transposase complex with DNA and glycerol (PDB code 3ecp). Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image Contents 1 Function 2 Structural highlights Function Transposases bind to the ends of a transposon and catalyze its movement to another part of the genome by a cut-and-paste mechanism[1]. Mu transposase (MuA) is essential for integration, replication-transposition and excision of bacteriophage Mu DNA into multiple sites of bacterial genome. Mu transposition occurs within the transposome which is a protein-DNA complex which includes 4 subunits of MuA[2]. Hermes transposase is a fly protein[3]. Dra2 transposase is a Deinococcus radiodurans protein Tn5 transposase active site contains the DDE motif which catalyzes the movement of the transposon[4]. Mos1 transposase mediates the movement of Mos1 transposon[5] Tc3 transposase mediates the movement of Tc3 transposon in C. elegans[6] Structural highlights Transposase contains a DDE motif in its active site[7] enabling it to coordinate the binding of divalent metal ions. The metal ions affect transposase reactivity. The DDE motif is conserved in transposases and retroviral integrases and is essential for their activity.

3D structures of transposase

Updated on 21-September-2016

References

1. ↑ Ivics Z, Li MA, Mates L, Boeke JD, Nagy A, Bradley A, Izsvak Z. Transposon-mediated genome manipulation in vertebrates. Nat Methods. 2009 Jun;6(6):415-22. doi: 10.1038/nmeth.1332. PMID:19478801 doi:http://dx.doi.org/10.1038/nmeth.1332
2. ↑ Rice P, Mizuuchi K. Structure of the bacteriophage Mu transposase core: a common structural motif for DNA transposition and retroviral integration. Cell. 1995 Jul 28;82(2):209-20. PMID:7628012
3. ↑ Park JM, Evertts AG, Levin HL. The Hermes transposon of Musca domestica and its use as a mutagen of Schizosaccharomyces pombe. Methods. 2009 Nov;49(3):243-7. doi: 10.1016/j.ymeth.2009.05.004. Epub 2009 May, 18. PMID:19450689 doi:http://dx.doi.org/10.1016/j.ymeth.2009.05.004
4. ↑ Reznikoff WS. Transposon Tn5. Annu Rev Genet. 2008;42:269-86. PMID:18680433 doi:http://dx.doi.org/10.1146/annurev.genet.42.110807.091656
5. ↑ Wang W, Swevers L, Iatrou K. Mariner (Mos1) transposase and genomic integration of foreign gene sequences in Bombyx mori cells. Insect Mol Biol. 2000 Apr;9(2):145-55. PMID:10762422
6. ↑ Colloms SD, van Luenen HG, Plasterk RH. DNA binding activities of the Caenorhabditis elegans Tc3 transposase. Nucleic Acids Res. 1994 Dec 25;22(25):5548-54. PMID:7838706
7. ↑ Klenchin VA, Czyz A, Goryshin IY, Gradman R, Lovell S, Rayment I, Reznikoff WS. Phosphate coordination and movement of DNA in the Tn5 synaptic complex: role of the (R)YREK motif. Nucleic Acids Res. 2008 Oct;36(18):5855-62. Epub 2008 Sep 12. PMID:18790806 doi:10.1093/nar/gkn577