Intr Rpts 3.2.7 Track Settings
 
Fragments of Interrupted Repeats Joined by RepeatMasker ID (RM version 3.2.7)   (All Variation and Repeats tracks)

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Show only items with score at or above:   (range: 0 to 1000)

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Data last updated at UCSC: 2009-01-30

Description

This track shows joined fragments of interrupted repeats extracted from the output of a more recent version (3.2.7, Jan. 2009) of the RepeatMasker program, which screens DNA sequences for interspersed repeats and low complexity DNA sequences using the Repbase Update library of repeats from the Genetic Information Research Institute (GIRI). Repbase Update is described in Jurka, J. (2000) in the References section below.

The detailed annotations from RepeatMasker are in the RepMask 3.2.7 track. This track shows fragments of original repeat insertions which have been interrupted by insertions of younger repeats or through local rearrangements. The fragments are joined using the ID column of RepeatMasker output.

Interrupted repeats from the original RepeatMasker run have been kept in the Interrupted Rpts track in order to avoid disrupting any analyses performed on the original run's results.

Display Conventions and Configuration

In pack or full mode, each interrupted repeat is displayed as boxes (fragments) joined by horizontal lines, labeled with the repeat name. If all fragments are on the same strand, then arrows are added to the horizontal line to indicate strand. In dense or squish mode, labels and arrows are omitted, and in dense mode, all items are collapsed to fit on a single row.

Items are shaded according to the average identity score of their fragments. Usually, the shade of an item is similar to the shades of its fragments, unless some fragments are much more diverged than others. The score displayed above is the average identity score, clipped to a range of 50% - 100%, and then mapped to the range 0 - 1000 for shading in the browser.

Methods

UCSC has used the most current versions of the RepeatMasker software and repeat libraries available to generate these data. Note that these versions may be newer than those that are publicly available on the Internet.

Data are generated using the RepeatMasker -s flag. Additional flags may be used for certain organisms. See the FAQ for more information.

Credits

Thanks to Arian Smit, Robert Hubley and GIRI for providing the tools and repeat libraries used to generate this track.

References

Smit, AFA, Hubley, R and Green, P. RepeatMasker Open-3.0. http://www.repeatmasker.org. 1996-2007.

Repbase Update is described in Jurka J. Repbase update: a database and an electronic journal of repetitive elements. Trends Genet. 2000 Sep;16(9):418-420.

For a discussion of repeats in mammalian genomes, see:

Smit AF. Interspersed repeats and other mementos of transposable elements in mammalian genomes. Curr Opin Genet Dev. 1999 Dec;9(6): 657-63.

Smit AF. The origin of interspersed repeats in the human genome. Curr Opin Genet Dev. 1996 Dec;6(6):743-8.