Abstract:
:A cDNA encoding the human GABAA receptor beta 3 subunit has been isolated from a brain cDNA library and its nucleotide sequence has been determined. This gene, GABRB3, has recently been mapped to human chromosome 15q11q13, the region deleted in Angelman and Prader-Willi syndromes. The association of distinct phenotypes with maternal versus paternal deletions of this region suggests that one or more genes in this region show parental-origin-dependent expression (genetic imprinting). Comparison of the inferred human beta 3 subunit amino acid sequence with beta 3 subunit sequences from rat, cow, and chicken shows a very high degree of evolutionary conservation. We have used this cDNA to map the mouse beta 3 subunit gene, Gabrb-3, in recombinant inbred strains. The gene is located on mouse chromosome 7, very closely linked to Xmv-33 between Tam-1 and Mtv-1, where two other genes from human 15q11q13 have also been mapped. This provides further evidence for a region of conserved synteny between human chromosome 15q11q13 and mouse chromosome 7. Proximal and distal regions of mouse chromosome 7 show genetic imprinting effects; however, the region of homology with human chromosome 15q11q13 has not yet been associated with these effects.
journal_name
Genomicsjournal_title
Genomicsauthors
Wagstaff J,Chaillet JR,Lalande Mdoi
10.1016/0888-7543(91)90034-csubject
Has Abstractpub_date
1991-12-01 00:00:00pages
1071-8issue
4eissn
0888-7543issn
1089-8646pii
0888-7543(91)90034-Cjournal_volume
11pub_type
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