Abstract:
:Homozygous transgenic mice from line A4 have an early-onset progressive neuromuscular disorder characterized by paralysis of the rear limbs, muscle atrophy, and lethality by 4 weeks of age. The transgene insertion site was mapped to distal chromosome 15 close to the locus motor endplate disease (med). The sequence of mouse DNA flanking the insertion site junctions was determined. A small (< 20 kb) deletion was detected at the insertion site, with no evidence of additional rearrangement of the chromosomal DNA. Noncomplementation of the transgene-induced mutation and med was demonstrated in a cross with medJ/+mice. The new allele is designated medTgNA4Bs (medtg). The homologous human locus MED was assigned to chromosome 12. Synaptotagmin 1 and contactin 1 were eliminated as candidate genes for the med mutation. The transgene-induced allele provides molecular access to the med gene, whose function is required for synaptic transmission at the neuromuscular junction and long-term survival of cerebellar Purkinje cells.
journal_name
Genomicsjournal_title
Genomicsauthors
Kohrman DC,Plummer NW,Schuster T,Jones JM,Jang W,Burgess DL,Galt J,Spear BT,Meisler MHdoi
10.1016/0888-7543(95)80198-usubject
Has Abstractpub_date
1995-03-20 00:00:00pages
171-7issue
2eissn
0888-7543issn
1089-8646pii
0888-7543(95)80198-Ujournal_volume
26pub_type
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