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The gene encoding ARS-binding factor I is essential for the viability of yeast
P R Rhode1, K S Sweder, K F Oegema
1Division of Chemistry, California Institute of Technology, Pasadena 91125.
Genes & Development
|December 1, 1989
Summary
The ABF1 gene was cloned, revealing its essential role in yeast vegetative growth. This ARS-binding protein is crucial for regulating genes involved in fundamental cellular processes.
Area of Science:
- Molecular Biology
- Yeast Genetics
- Protein Function
Background:
- ARS-binding factor I (ABF I) interacts with autonomously replicating sequences (ARSs) in yeast.
- ABF I also binds to regulatory regions of genes critical for transcription, translation, respiration, and cell-cycle control.
Purpose of the Study:
- To clone the gene encoding yeast ABF I.
- To investigate the function and importance of ABF I in yeast.
Main Methods:
- Screening a yeast genomic lambda gt11 library using antibodies against ABF I.
- Generating null mutants of the ABF1 gene.
- DNA sequencing of the ABF1 gene.
Main Results:
- The ABF1 gene was successfully cloned.
- Null mutants for ABF1 are not viable, indicating ABF I is essential for vegetative growth.
- DNA sequence analysis revealed motifs typical of DNA-binding proteins, but no homology to known proteins.
Conclusions:
- ABF I is an essential protein for yeast viability and growth.
- The ABF1 gene product plays a significant role in regulating genes involved in core cellular functions.
- ABF I represents a novel DNA-binding protein with a unique functional role.