Comparative study of the genomic organization of DNA repeats within the 5′-flanking region of the natural resistance-associated macrophage protein gene (NRAMP1) between humans and great apes

Comparative study of the genomic organization of DNA repeats within the 5′-flanking region of... The human NRAMP1 gene located on Chromosome (Chr) region 2q35 is a candidate gene for increased risk of infection by several intracellular macrophage parasites, including M. tuberculosis and M. leprae. In search for a possible mutational hot spot, we have analyzed a 3.5-kb region 5′ to NRAMP1 that is highly enriched for DNA repeat sequences. The repeat sequences could be grouped into one Mer element and six Alu elements, representing five Alu subfamilies, that had integrated in the same DNA region during successive rounds of Alu retropositional activity. Comparative sequence analysis of the Alu cluster region in humans, chimpanzee (Pan paniscus), and gorilla (Gorilla gorilla) revealed only modest sequence variability and failed to detect any evidence for genomic instability of the highly repetitive DNA region. These results show that sequence length variants in the Alu-flanking regions as well as nucleotide substitutions are the most common genomic variations even in a region of extreme Alu-clustering. Moreover, the high degree of sequence conservation among three primate species argues against the Alu cluster being the site of frequent genomic rearrangements or other frequent genetic events that might influence NRAMP1 expression. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Comparative study of the genomic organization of DNA repeats within the 5′-flanking region of the natural resistance-associated macrophage protein gene (NRAMP1) between humans and great apes

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Publisher
Springer-Verlag
Copyright
Copyright © 1998 by Springer-Verlag New York Inc.
Subject
Life Sciences; Cell Biology; Animal Genetics and Genomics; Human Genetics
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s003359900792
Publisher site
See Article on Publisher Site

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