Abstract:
:The microtubule-associated protein 1B (MAP1B) locus has been mapped in close proximity to spinal muscular atrophy (SMA) on chromosome 5q13. We have identified a second microsatellite within a MAP1B intron, which increases the heterozygosity of this locus to 94%. Two unambiguous recombination events establish MAP1B as a closely linked, distal flanking marker for the disease locus, while a third recombinant establishes D5S6 as the proximal flanking marker. The combination of key recombinants and linkage analysis place the SMA gene in an approximately 2-cM interval between loci D5S6 and MAP1B. Physical mapping and cloning locate MAP1B within 250 kb of locus D5S112. The identification and characterization of a highly polymorphic gene locus tightly linked to SMA will facilitate isolation of the disease gene, evaluation of heterogeneity, and development of a prenatal test for SMA.
journal_name
Genomicsjournal_title
Genomicsauthors
Brzustowicz LM,Kleyn PW,Boyce FM,Lien LL,Monaco AP,Penchaszadeh GK,Das K,Wang CH,Munsat TL,Ott Jdoi
10.1016/0888-7543(92)90012-hsubject
Has Abstract,Author List Incompletepub_date
1992-08-01 00:00:00pages
991-8issue
4eissn
0888-7543issn
1089-8646journal_volume
13pub_type
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