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- Insertion_sequence abstract "An insertion sequence (also known as an IS, an insertion sequence element, or an IS element) is a short DNA sequence that acts as a simple transposable element. Insertion sequences have two major characteristics: they are small relative to other transposable elements (generally around 700 to 2500 bp in length) and only code for proteins implicated in the transposition activity (they are thus different from other transposons, which also carry accessory genes such as antibiotic resistance genes). These proteins are usually the transposase which catalyses the enzymatic reaction allowing the IS to move, and also one regulatory protein which either stimulates or inhibits the transposition activity. The coding region in an insertion sequence is usually flanked by inverted repeats. For example, the well-known IS911 (1250 bp) is flanked by two 36bp inverted repeat extremities and the coding region has two genes partially overlapping orfA and orfAB, coding the transposase (OrfAB) and a regulatory protein (OrfA). [1]A particular insertion sequence may be named according to the form ISn, where n is a number (e.g. IS1, IS2, IS3, IS10, IS50, IS911, IS26 etc.); this is not the only naming scheme used, however. Although insertion sequences are usually discussed in the context of prokaryotic genomes, certain eukaryotic DNA sequences belonging to the family of Tc1/mariner transposable elements may be considered to be, insertion sequences. [2] In addition to occurring autonomously, insertion sequences may also occur as parts of composite transposons; in a composite transposon, two insertion sequences flank one or more accessory genes, such as an antibiotic resistance gene (e.g. Tn10, Tn5). Nevertheless, there exist another sort of transposons, called unit transposons, that do not carry insertion sequences at their extremities (e.g. Tn7).A complex transposon does not rely on flanking insertion sequences for resolvase. The resolvase is part of the tns genome and cuts at flanking inverted repeats.".
- Insertion_sequence thumbnail Composite_transposon.svg?width=300.
- Insertion_sequence wikiPageExternalLink 725.
- Insertion_sequence wikiPageExternalLink SEC6.
- Insertion_sequence wikiPageExternalLink www-is.biotoul.fr.
- Insertion_sequence wikiPageExternalLink IS911.
- Insertion_sequence wikiPageID "3692001".
- Insertion_sequence wikiPageRevisionID "585862525".
- Insertion_sequence hasPhotoCollection Insertion_sequence.
- Insertion_sequence subject Category:Genetics.
- Insertion_sequence subject Category:Mobile_genetic_elements.
- Insertion_sequence subject Category:Molecular_biology.
- Insertion_sequence type Abstraction100002137.
- Insertion_sequence type Cognition100023271.
- Insertion_sequence type Component105868954.
- Insertion_sequence type Concept105835747.
- Insertion_sequence type Content105809192.
- Insertion_sequence type Idea105833840.
- Insertion_sequence type MobileGeneticElements.
- Insertion_sequence type Part105867413.
- Insertion_sequence type PsychologicalFeature100023100.
- Insertion_sequence comment "An insertion sequence (also known as an IS, an insertion sequence element, or an IS element) is a short DNA sequence that acts as a simple transposable element. Insertion sequences have two major characteristics: they are small relative to other transposable elements (generally around 700 to 2500 bp in length) and only code for proteins implicated in the transposition activity (they are thus different from other transposons, which also carry accessory genes such as antibiotic resistance genes).".
- Insertion_sequence label "Insertion sequence".
- Insertion_sequence label "Insertionssequenz".
- Insertion_sequence label "Secuencia de inserción".
- Insertion_sequence label "Sequenza di inserzione".
- Insertion_sequence label "Инсерционная последовательность".
- Insertion_sequence sameAs Insertionssequenz.
- Insertion_sequence sameAs Secuencia_de_inserción.
- Insertion_sequence sameAs Sequenza_di_inserzione.
- Insertion_sequence sameAs m.09vr2j.
- Insertion_sequence sameAs Q417216.
- Insertion_sequence sameAs Q417216.
- Insertion_sequence sameAs Insertion_sequence.
- Insertion_sequence wasDerivedFrom Insertion_sequence?oldid=585862525.
- Insertion_sequence depiction Composite_transposon.svg.
- Insertion_sequence isPrimaryTopicOf Insertion_sequence.
