Transposon

A transposon is a sequence of DNA able to move by itself within the genome
preferentially in genic regions; characterized as mobile genetic element or transposable element. This event
occur according differents transposition mechanism. One of them called cut-and-paste mechanism require an enzyme : transposase. This
enzyme is encoded within some transposons. Transposase binds to the end of the transposon, which is consist of
inverted repeats and catalyze the movement of transposon for insertion and excision.

Transposas Tn10 / Is10

The complex Tn10/IS10 is involved in the non-replicative cut-and-paste mechanism.; the transposable segment is excised by cleavage at the transposon ends and then re-inserted in a target DNA site.
Tn10 transposase protein is made up of 402 amino-acid, which recognise inverted repeats insertion sequence; Is10-right and Is10-left. Tn10 is a composite bacterial transposon subject to a strong positive and negative regulation.

IS 10 is an insertion sequence composing the transposon Tn10. The two Is10 elements, Is10-Right and Is10-Left, contain all of the Tn10 encoded genetic determinants; as the coding region for the transposase protein Tn10. The two ends of IS-10 have a similar terminal inverted repeat of 23bp, correspond to the transposase-binding site. However some genetic drift between both result in different functionality; Is10-right is fully functional while Is10-left is partially functional.

Our project

We tested some plasmids, and some methods to transform Pseudovibrio denitrificans but unsuccessfully. So the integration in the genome was tested. For it the researcher Brian Jester gave us the plasmide pNK2 as well as cells DH5α pir.In fact the plasmid pNK2 contains a particular origine of replication OriVR6Kgamma.

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