The human genome contains many dispersed tandem-repetitive ‘minisatellite’ regions detected via a shared 10–base pair ‘core’ sequence similar to the. Genetic analysis is now simplified by the availability of probes for hypervariable regions of human DNA showing multiallelic variation and correspondingly. A minisatellite is a tract of repetitive DNA in which certain DNA motifs are typically repeated times. Minisatellites occur at more than 1, locations in the human genome and In humans, 90% of minisatellites are found at the sub- telomeric region of “Hypervariable ‘minisatellite’ regions in human DNA”. Nature.
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Abstract We present DNA sequences flanking cloned hypervariable human minisatellites. Since all hypermutable minisatellites contain internal variantsthey provide extremely informative systems for analyzing the complex turnover processes that occur at this class of tandem repeat. Add comment Close comment form modal. Hjman evolution of megasatellites in yeasts. For the size class of orbiting spacecraft, see miniaturized satellite.
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Minisatellite – Wikipedia
Repeat turnover therefore appears to be controlled by recombinational activity in DNA that flanks the repeat array and results in a polarity of mutation. Views Read Edit View history. Minisatellites were subsequently also used for genetic markers in linkage analysis and population studies, but were soon replaced by microsatellite profiling in the s.
Finally, with the discovery of tandem iterations of simple sequence motifs, the term microsatellites was coined. Minisatellites have been implicated [ citation needed ] as regulators of gene expression e.
There might be a discussion about this on the talk page. Minisatellites are small sequences of DNA that do regionz encode proteins but appear throughout the genome hundreds of times, with many repeated copies lying next to each other.
Sign In or Create an Account. These variant repeats are tandemly intermingled. Learn how and when to remove these template messages. This article may be confusing or unclear to readers. Minisatellite variant repeat mapping by PCR MVR-PCR has been extensively used to chart the interspersion patterns of variant repeats along the array, which provides details on the structure of the alleles before and after mutation.
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Studies have revealed distinct mutation processes operating in somatic and germline cells. H-NS uses an autoinhibitory conformational switch for environment-controlled gene silencing. When shorter 10—bp tandem repeats were later identified, they came to be known as minisatellites. Most users should sign in with their email address. Such an event would ultimately lead to the extinction of a hypermutable minisatellite by meiotic drive.
Emery’s Elements of Medical Genetics, 12th.
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You have entered an invalid code. WikiProject Genetics may be able to help recruit an expert. I agree to the terms and conditions. We present DNA sequences flanking cloned hypervariable hyperariable minisatellites. Minisatellites have been associated with chromosome fragile sites and are proximal to a number of recurrent translocation breakpoints.
Minisatellites consist of repetitive, generally GC -rich, [ citation needed ] motifs that range in length from 10 to over base pairs. Receive exclusive offers and updates from Oxford Academic. It has been proposed that minisatellite sequences encourage chromosomes to swap DNA. Close mobile search navigation Article navigation.
Jeffreys; Sequences flanking the repeat arrays of human minlsatellites: Additional analyses of Hukan sequences flanking human ministaellite have also revealed an intense and highly localized meiotic crossover hotspot that is centered upstream of the unstable side of minisatellite arrays.
The human telomere sequence itself is a tandem repeat: This article has multiple issues. You must accept the terms and conditions.