This gene is part of a 500 kb inverted duplication on
chromosome 5q13. This duplicated region contains at least four
genes and repetitive elements which make it prone to rearrangements
and deletions. The repetitiveness and complexity of the sequence
have also caused difficulty in determining the organization of this
genomic region. The telomeric and centromeric copies of this gene
are nearly identical and encode the same protein. However,
mutations in this gene, the telomeric copy, are associated with
spinal muscular atrophy; mutations in the centromeric copy do not
lead to disease. The centromeric copy may be a modifier of disease
caused by mutation in the telomeric copy. The critical sequence
difference between the two genes is a single nucleotide in exon 7,
which is thought to be an exon splice enhancer. Note that the nine
exons of both the telomeric and centromeric copies are designated
historically as exon 1, 2a, 2b, and 3-8. It is thought that gene
conversion events may involve the two genes, leading to varying
copy numbers of each gene. The protein encoded by this gene
localizes to both the cytoplasm and the nucleus. Within the
nucleus, the protein localizes to subnuclear bodies called gems
which are found near coiled bodies containing high concentrations
of small ribonucleoproteins (snRNPs). This protein forms
heteromeric complexes with proteins such as SIP1 and GEMIN4, and
also interacts with several proteins known to be involved in the
biogenesis of snRNPs, such as hnRNP U protein and the small
nucleolar RNA binding protein. Two transcript variants encoding
distinct isoforms have been described.1) Todd, A.G., et al. J. Mol. Biol. 401(5):681-689(2010)
Immunogen
This SMN1 antibody is generated from rabbits immunized with a KLH conjugated synthetic peptide between 262-288 amino acids from the C-terminal region of human SMN1.
Western blot analysis in 293 cell line lysates (35ug/lane).
Application Notes
For WB starting dilution is: 1:1000
Additional Information
Form
Liquid
Storage Instructions
Store at 4˚C for three months and -20˚C, stable for up to one year. As with all antibodies care should be taken to avoid repeated freeze thaw cycles. Antibodies should not be exposed to prolonged high temperatures.