Spinal muscular atrophy is not the result of mutations at the beta-hexosaminidase or GM2-activator locus.

Abstract:

:The disease locus for the clinically heterogeneous childhood spinal muscular atrophies (SMA) maps to the chromosome 5 subregion, 5q11.2-13.3. The beta-subunit of beta-D-N-acetylhexosaminidase (hexosaminidase) (EC 3.2.1.52) (Hex B) maps to the same region, and the protein required for substrate recognition by this enzyme, GM2-activator protein, likewise maps to chromosome 5. We have investigated the possibility of allelic variation among some forms of SMA and hexosaminidase deficiency. Recombination between the Hex B and SMA loci eliminates this enzyme as a candidate site for defects causing the illness. Furthermore, we show that, despite previous evidence to the contrary, the GM2-activator locus does not map to chromosome 5, thereby eliminating it as a candidate gene for SMA.

journal_name

Neurology

journal_title

Neurology

authors

Kleyn PW,Brzustowicz LM,Wilhelmsen KC,Freimer NB,Miller JM,Munsat TL,Gilliam TC

doi

10.1212/wnl.41.9.1418

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

1418-22

issue

9

eissn

0028-3878

issn

1526-632X

journal_volume

41

pub_type

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