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PMID: 2123293 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

Transcriptional derepression of the Saccharomyces cerevisiae HSP26 gene during heat shock.

Molecular and cellular biology ·Vol. 10 ·No. 12 ·1990-12-00 ·Pages 6362-73

Susek RE, Lindquist S

Abstract

hsp26, the small heat shock protein of Saccharomyces cerevisiae, accumulates in response to heat and other types of stress. It also accumulates during the normal course of development, as cells enter stationary phase growth or begin to sporulate (S. Kurtz, J. Rossi, L. Petko, and S. Lindquist, Science 231:1154-1157, 1986). Analysis of deletion and insertion mutations demonstrated that transcriptional control plays a critical role in regulating HSP26 expression. The HSP26 promoter was found to be complex and appears to contain repressing elements as well as activating elements. Several upstream deletion mutations resulted in strong constitutive expression of HSP26. Furthermore, upstream sequences from the HSP26 gene repressed the constitutive expression of a heterologous heat shock gene. We propose that basal repression and heat-induced depression of transcription play major roles in regulating the expression of HSP26. None of the recombinant constructs that we analyzed separated cis-regulatory sequences responsible for heat shock regulation from those responsible for developmental regulation of HSP26. Depression of HSP26 transcription may be the general mechanism of HSP26 induction in yeast cells. This regulatory scheme is very different from that described for the regulation of most other heat shock genes.

Related Genes
HSP26
MeSH Terms
Amino Acid Sequence Base Sequence Chromosome Deletion Gene Expression Regulation, Fungal Genes, Fungal Heat-Shock Proteins/genetics Hot Temperature Molecular Sequence Data Mutagenesis, Insertional Oligonucleotide Probes Restriction Mapping Saccharomyces cerevisiae/genetics Transcription, Genetic beta-Galactosidase/genetics,metabolism
Chemicals
Heat-Shock Proteins Oligonucleotide Probes beta-Galactosidase
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Susek R E
Department of Molecular Genetics and Cell Biology, Howard Hughes Medical Institute, University of Chicago, Illinois 60637.
Lindquist S
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Article Info
Journal
Molecular and cellular biology
Abbr.
Mol Cell Biol
ISSN
0270-7306
DOI
10.1128/mcb.10.12.6362-6373.1990
Published
1990-12-00
Pages
6362-73
Language
English
Region
United States
NLM ID
8109087
PMCID
PMC362912
Subset
IM
Grants
NIGMS NIH HHS · GM07183 · United States
NIGMS NIH HHS · GM35482 · United States
External Links
PubMed source DOI: 10.1128/mcb.10.12.6362-6373.1990 PMC Full Text View journal details
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