BMS1062 Lecture Notes - Lecture 15: Capsid, Gram-Positive Bacteria, Integrase
14 Aug 2018
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What are the different types of mobile dna. Mobile dna / transposable elements are discrete segments of dna that can move from one site of dna to another : they can move within one chromosome or move between 2 chromosomes or between entire cell / species. This movement of mobile dna is called transposition / site-specific recombination. These mobile elements generally encode the enzymes required for their movement or transposition. These enzymes are known as transposases or site-specific recombinases. Types of transposable elements these mobile elements can be classified by how they move can be a dna/rna intermediate. Insertion sequences ( dna intermediate) simplest transposable element have inverted sequence repeats at the end only encodes enzymes required for mobilization. Composite have two insertion sequences with intervening coding sequence. Insertion sequences contain sequences that are inverted repeats at either ends ( not perfect) Encodes a single transposase gene in between these 2 inverted repeats.
