GSBS Student Publications

Title

Isolation of the gene encoding the Saccharomyces cerevisiae centromere-binding protein CP1

GSBS Program

Biochemistry & Molecular Pharmacology

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Molecular Genetics and Microbiology

Date

6-1-1990

Document Type

Article

Medical Subject Headings

Amino Acid Sequence; Base Sequence; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; Centromere; Chromosomes, Fungal; DNA, Fungal; DNA-Binding Proteins; Escherichia coli; Fungal Proteins; *Genes; *Genes, Fungal; Genotype; Immunoblotting; Molecular Sequence Data; Phenotype; Plasmids; Restriction Mapping; Saccharomyces cerevisiae; *Saccharomyces cerevisiae Proteins

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

CP1 is a sequence-specific DNA-binding protein of the yeast Saccharomyces cerevisiae which recognizes the highly conserved DNA element I (CDEI) of yeast centromeres. We cloned and sequenced the gene encoding CP1. The gene codes for a protein of molecular weight 39,400. When expressed in Escherichia coli, the CP1 gene directed the synthesis of a CDEI-binding protein having the same gel mobility as purified yeast CP1. We have given the CP1 gene the genetic designation CEP1 (centromere protein 1). CEP1 was mapped and found to reside on chromosome X, 2.0 centimorgans from SUP4. Strains were constructed in which most of CEP1 was deleted. Such strains lacked detectable CP1 activity and were viable; however, CEP1 gene disruption resulted in a 35% increase in cell doubling time and a ninefold increase in the rate of mitotic chromosome loss. An unexpected consequence of CP1 gene disruption was methionine auxotrophy genetically linked to cep1. This result and the recent finding that CDEI sites in the MET25 promoter are required to activate transcription (D. Thomas, H. Cherest, and Y. Surdin-Kerjan, J. Mol. Biol. 9:3292-3298, 1989) suggest that CP1 is both a kinetochore protein and a transcription factor.

Rights and Permissions

Citation: Mol Cell Biol. 1990 Jun;10(6):2458-67.

Related Resources

Link to article in PubMed

Journal Title

Molecular and cellular biology

PubMed ID

2188087