Extended runs of homozygosity at 17q11.2: an association with type‐2 NF1 deletions?
Extended runs of homozygosity at 17q11.2: an association with type‐2 NF1 deletions?
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17q11 2 处纯合性的扩展运行:与 2 型 NF1 缺失相关吗?
DOI:
10.1002/humu.21191
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发表时间:
2010
期刊:
影响因子:
3.9
通讯作者:
Kehrer-Sawatzki H
中科院分区:
文献类型:
--
作者:
Roehl AC;Cooper DN;Kluwe L;Helbrich A;Wimmer K;Högel J;Mautner VF;Kehrer-Sawatzki H
Large deletions in theNF1gene region at 17q11.2 are caused by nonallelic homologous recombination (NAHR). The recurrent type‐2NF1deletions span 1.2 Mb, with breakpoints in theSUZ12gene andSUZ12P. Type‐2NF1deletions occur preferentially during mitosis and are associated with somatic mosaicism. A panel of 16 type‐2NF1deletions was used as a model system in which to investigate whether extended homozygosity across 17q11.2 might be associated with somatic deletion. Using SNP arrays, a 3.2 Mb interval encompassing theNF1deletion region was found to harbor runs of homozygosity (ROHs) in different human populations. However, ROHs ≥500 kb directly flanking theNF1deletion region on both sides were not found to occur disproportionately in NF1 patients harboring type‐2 deletions compared to controls. Although low allelic diversity in 17q11.2 is unlikely to be a key factor in promoting NAHR‐mediated somatic type‐2 deletions, a specific ROH of 588 kb (roh1), located some 525 kb proximal to the deletion interval, was found to occur more frequently (P=0.012) in the type‐2 deletion patients compared with controls. We postulate that roh1 may act remotely, via an as yet unknown mechanism, to increase the frequency of somatic recombination between the distally duplicatedSUZ12sequences. Hum Mutat 30:1–10, 2010. © 2010 Wiley‐Liss, Inc.
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影响因子:
11.2
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影响因子:
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