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A locus for nonspecific X‐linked mental retardation mapped to a 22.3 cM region of Xp11.3‐q22.3
Author(s) -
Zhang Xiyu,
Liu Qiji,
Chen Bingxi,
Guo Chenhong,
Li Jiangxia,
Gao Guimin,
Guo Yishou,
Gong Yaoqin
Publication year - 2004
Publication title -
american journal of medical genetics part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.064
H-Index - 112
eISSN - 1552-4833
pISSN - 1552-4825
DOI - 10.1002/ajmg.a.30121
Subject(s) - locus (genetics) , genetics , psychology , biology , computational biology , gene
By using several microsatellite markers scattered along the X chromosome, we studied a Chinese family with nonspecific X‐linked mental retardation (MRX84) to search for a region including the MRX84 locus that was linked to the markers. Two‐point linkage analysis demonstrated linkage between the disorder and several markers located at Xq22.2, with maximum LOD score Z max = 2.41 at recombination fraction θ = 0 for DXS1191 and DXS1230, respectively. Recombination events were observed with flanking markers DXS8080 and DXS456, located at Xp11.3 and Xq22.3, respectively, and a region of approximately 22.3 cM was defined. Accordingly, markers distal to Xp11.3 and Xq22.3 segregated independently of the disease. The localized region observed in this Chinese family overlaps with 29 other MRX loci previously reported in Xp11.3‐q22.3. These results should contribute to the identification of the disease gene for the MRX84 disorder. © 2004 Wiley‐Liss, Inc.