Related Experiment Videos
The human cystathionine beta-synthase (CBS) gene: complete sequence, alternative splicing, and polymorphisms
J P Kraus1, J Oliveriusová, J Sokolová
1Department of Pediatrics, University of Colorado School of Medicine, Denver, Colorado 80262, USA. JAN.KRAUS@UCHSC.edu
Genomics
|October 29, 1998
Summary
Researchers cloned and sequenced the human Cystathionine beta-synthase (CBS) gene, crucial for transsulfuration and deficient in homocystinuria. This study details its structure, regulatory regions, and potential for genetic instability.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Cystathionine beta-synthase (CBS) is essential for transsulfuration pathway.
- CBS deficiency causes classical homocystinuria.
- Understanding the human CBS gene is critical for genetic and metabolic research.
Purpose of the Study:
- To molecularly clone and determine the complete nucleotide sequence of the human CBS gene.
- To characterize the gene's structure, including exons, UTRs, and flanking regions.
- To identify and analyze promoter regions and repetitive elements within the CBS locus.
Main Methods:
- Molecular cloning techniques.
- DNA sequencing to determine the complete nucleotide sequence.
- Bioinformatic analysis of gene structure, regulatory elements, and repetitive sequences.
Main Results:
- The complete nucleotide sequence of the human CBS gene and its 5' flanking region (28,046 nucleotides) was determined.
- The human CBS gene comprises 23 exons with alternative splicing noted in the 5' UTR.
- Two GC-rich, TATA-less promoter regions with multiple transcription factor binding sites were identified.
- The CBS locus contains numerous Alu repeats and polymorphic DNA sequence repeats.
Conclusions:
- The detailed characterization of the human CBS gene provides a foundation for understanding CBS function and dysfunction.
- The identified promoter regions offer insights into CBS gene regulation.
- The presence of repetitive elements suggests potential mechanisms for CBS gene instability and rearrangements.