Publication Date:
1993-01-08
Description:
The human and Drosophila heat shock transcription factors (HSFs) are multi-zipper proteins with high-affinity binding to DNA that is regulated by heat shock-induced trimerization. Formation of HSF trimers is dependent on hydrophobic heptad repeats located in the amino-terminal region of the protein. Two subregions at the carboxyl-terminal end of human HSF1 were identified that maintain the monomeric form of the protein under normal conditions. One of these contains a leucine zipper motif that is conserved between vertebrate and insect HSFs. These results suggest that the carboxyl-terminal zipper may suppress formation of trimers by the amino-terminal HSF zipper elements by means of intramolecular coiled-coil interactions that are sensitive to heat shock.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rabindran, S K -- Haroun, R I -- Clos, J -- Wisniewski, J -- Wu, C -- New York, N.Y. -- Science. 1993 Jan 8;259(5092):230-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8421783" target="_blank"〉PubMed〈/a〉
Keywords:
Amino Acid Sequence
;
Animals
;
Binding Sites
;
Cell Line
;
DNA/metabolism
;
Drosophila/chemistry
;
Heat-Shock Proteins/*chemistry/genetics/metabolism
;
Hot Temperature
;
Humans
;
*Leucine Zippers
;
Macromolecular Substances
;
Molecular Sequence Data
;
Mutagenesis
;
Structure-Activity Relationship
;
Transfection
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
