Related Experiment Videos
Multiple global regulators control HIS4 transcription in yeast
Science (New York, N.Y.)
|August 21, 1987
Summary
Yeast gene expression involves DNA binding proteins controlling metabolic pathways. BAS2 (also known as PHO2) regulates histidine, purine, and phosphate metabolism by binding to specific gene promoters.
Area of Science:
- Molecular Biology
- Yeast Genetics
- Metabolic Regulation
Background:
- Gene expression relies on DNA-binding factors interacting with promoter elements.
- Yeast HIS4 gene expression is controlled by general amino acid control (GCN4) and basal level control.
- Basal level control of HIS4 involves BAS1 and BAS2, also crucial for purine biosynthesis.
Purpose of the Study:
- To investigate the role of BAS2 in HIS4 gene regulation.
- To identify the function of BAS2 in metabolic pathway coordination.
- To determine if BAS2 is identical to a previously identified gene.
Main Methods:
- Genetic mapping and DNA sequence analysis.
- Biochemical analysis of gene product function.
- Promoter binding assays.
Main Results:
- BAS2 was identified as PHO2, a known regulator of phosphate metabolism.
- BAS2 encodes a protein that binds to HIS4 and PHO5 promoters.
- BAS2 plays a role in histidine, purine, and phosphate metabolism.
Conclusions:
- A single DNA-binding protein (BAS2/PHO2) regulates multiple metabolic pathways in yeast.
- Yeast utilizes key DNA-binding proteins to coordinate diverse metabolic processes.
- This suggests a conserved mechanism for metabolic regulation.