Related Experiment Videos
The KLHL1-antisense transcript ( KLHL1AS) is evolutionarily conserved
Kellie A Benzow1, Michael D Koob
1Institute of Human Genetics, MMC 206 UMHC, 420 Delaware St. SE., University of Minnesota, Minneapolis, Minnesota 55455, USA.
Summary
Spinocerebellar ataxia type 8 (SCA8) arises from a CTG expansion in the KLHL1-antisense (KLHL1AS) RNA. This study identifies the KLHL1AS promoter and its conserved role in regulating KLHL1 gene expression in humans and mice.
Area of Science:
- Neurogenetics
- Molecular Biology
- Gene Regulation
Background:
- Spinocerebellar ataxia type 8 (SCA8) is linked to CTG repeat expansions in the KLHL1-antisense (KLHL1AS) RNA.
- The precise function of KLHL1AS RNA in normal physiology remains undetermined.
Purpose of the Study:
- To identify the promoter region of the human KLHL1AS RNA.
- To investigate the presence and characteristics of KLHL1AS transcripts in mice.
- To explore the evolutionary conservation and potential regulatory role of KLHL1AS.
Main Methods:
- Promoter identification assays.
- RNA isolation and analysis (RT-PCR, Northern blotting).
- Comparative genomic analysis of human and mouse KLHL1AS genes.
Main Results:
- The promoter region for human KLHL1AS was identified within the first intron of the KLHL1 gene.
- A homologous Klhl1as transcript was detected in mice, transcribed from a similar promoter region.
- Mouse Klhl1as RNA is unspliced, while human KLHL1AS exhibits variable splicing.
- Both human and mouse KLHL1AS show expression in the cerebellum and other tissues, suggesting a conserved biological role.
Conclusions:
- The KLHL1AS transcript is conserved across species and likely plays a significant role in regulating KLHL1 gene expression.
- Understanding KLHL1AS regulation may offer insights into SCA8 pathogenesis.