Abstract:
:While scanning for single-nucleotide polymorphisms (SNPs) in the human Xq25-q28 region of CEPH families, we found six long "deserts" of low SNP incidence representing 28% of the investigated genome. One was 1.66 Mb in length. To determine whether these SNP deserts were due to reduced input of mutations or to recent coalescent events such as bottlenecks or selective sweeps, comparative sequence was determined from a female orangutan. The mean divergence was 2.9% and was not reduced in deserts compared with nondesert regions. Thus, the best explanation for the SNP deserts is recent coalescent events in humans. These events are the cause of substantial variation in human noncoding SNP incidence. In addition, the mutational spectrum in humans and orangutans was estimated as 63% AG (and CT), 17% AC (and GT), 8% CG, 4% AT, and 8% insertion/deletions. The average lifetime of a SNP destined to become fixed for a new allele between these species was estimated as 284,000 years.
journal_name
Genomicsjournal_title
Genomicsauthors
Miller RD,Taillon-Miller P,Kwok PYdoi
10.1006/geno.2000.6417subject
Has Abstractpub_date
2001-01-01 00:00:00pages
78-88issue
1eissn
0888-7543issn
1089-8646pii
S0888-7543(00)96417-6journal_volume
71pub_type
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