Insertional mutation of the motor endplate disease (med) locus on mouse chromosome 15.

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

Genomics

journal_title

Genomics

authors

Kohrman DC,Plummer NW,Schuster T,Jones JM,Jang W,Burgess DL,Galt J,Spear BT,Meisler MH

doi

10.1016/0888-7543(95)80198-u

subject

Has Abstract

pub_date

1995-03-20 00:00:00

pages

171-7

issue

2

eissn

0888-7543

issn

1089-8646

pii

0888-7543(95)80198-U

journal_volume

26

pub_type

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