| Disturbance of normal cell cycle progression enhances the establishment of transcriptional silencing in Saccharomyces cerevisiae. | |
| | |
MedLine Citation:
|
PMID: 7791768 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Previous studies have indicated that mutation of RAP1 (rap1s) or of the HMR-E silencer ARS consensus element leads to metastable repression of HMR. A number of extragenic suppressor mutations (sds, suppressors of defective silencing) that increase the fraction of repressed cells in rap1s hmr delta A strains have been identified. Here we report the cloning of three SDS genes. SDS11 is identical to SWI6, a transcriptional regulator of genes required for DNA replication and of cyclin genes. SDS12 is identical to RNR1, which encodes a subunit of ribonucleotide reductase. SDS15 is identical to CIN8, whose product is required for spindle formation. We propose that mutations in these genes improve the establishment of silencing by interfering with normal cell cycle progression. In support of this idea, we show that exposure to hydroxyurea, which increases the length of S phase, also restores silencing in rap1s hmr delta A strains. Mutations in different cyclin genes (CLN3, CLB5, and CLB2) and two cell cycle transcriptional regulators (SWI4 and MBP1) also suppress the silencing defect at HMR. The effect of these cell cycle regulators is not specific to the rap1s or hmr delta A mutation, since swi6, swi4, and clb5 mutations also suppress mutations in SIR1, another gene implicated in the establishment of silencing. Several mutations also improve the efficiency of telomeric silencing in wild-type strains, further demonstrating that disturbance of the cell cycle has a general effect on position effect repression in Saccharomyces cerevisiae. We suggest several possible models to explain this phenomenon. |
| | |
Authors:
|
H Laman; D Balderes; D Shore |
Related Documents
:
|
22205668 - A local affair: how the mammary gland adapts to changes in milking frequency. 15189148 - The sir2 family of protein deacetylases. 10512858 - The schizosaccharomyces pombe hst4(+) gene is a sir2 homologue with silencing and centr... 15179058 - A method of high frequency virus-induced gene silencing in chili pepper (capsicum annuu... 12379328 - Optimisation of herpes simplex virus-based vectors for delivery to human peripheral blo... 1930188 - Cloning and tissue expression of a rat histamine h2-receptor gene. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
|
Title: Molecular and cellular biology Volume: 15 ISSN: 0270-7306 ISO Abbreviation: Mol. Cell. Biol. Publication Date: 1995 Jul |
Date Detail:
|
Created Date: 1995-07-27 Completed Date: 1995-07-27 Revised Date: 2009-11-19 |
Medline Journal Info:
|
Nlm Unique ID: 8109087 Medline TA: Mol Cell Biol Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 3608-17 Citation Subset: IM |
Affiliation:
|
Department of Microbiology, College of Physicians & Surgeons of Columbia University, New York, New York 10032, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Cell Cycle
/
genetics* Cloning, Molecular Cyclins / genetics DNA-Binding Proteins Fungal Proteins / genetics, metabolism Gene Dosage Gene Expression Regulation, Fungal* Genes, Fungal / genetics Genes, Regulator Hydroxyurea / pharmacology Microtubule-Associated Proteins Mutagenesis Mutation Peptide Biosynthesis Peptides / genetics* Regulatory Sequences, Nucleic Acid / genetics* Ribonucleotide Reductases / genetics Saccharomyces cerevisiae / genetics* Saccharomyces cerevisiae Proteins* Silent Information Regulator Proteins, Saccharomyces cerevisiae* Telomere / genetics Trans-Activators / genetics Transcription Factors / genetics, metabolism Transcription, Genetic |
| Grant Support | |
ID/Acronym/Agency:
|
CA09503-0/CA/NCI NIH HHS; GM40094/GM/NIGMS NIH HHS |
| Chemical | |
Reg. No./Substance:
|
0/CIN8 protein, S cerevisiae; 0/Cyclins; 0/DNA-Binding Proteins; 0/Fungal Proteins; 0/MBP1 protein, S cerevisiae; 0/Microtubule-Associated Proteins; 0/Peptides; 0/SIR1 protein, S cerevisiae; 0/SIR4 protein, S cerevisiae; 0/SWI4 protein, S cerevisiae; 0/SWI6 protein, S cerevisiae; 0/Saccharomyces cerevisiae Proteins; 0/Silent Information Regulator Proteins, Saccharomyces cerevisiae; 0/Trans-Activators; 0/Transcription Factors; 127-07-1/Hydroxyurea; 61194-02-3/mating factor; EC 1.17.4.-/Ribonucleotide Reductases |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Functional mRNA can be generated by RNA polymerase III.
Next Document: Repression of activator-mediated transcription by herpes simplex virus ICP4 via a mechanism involvin...