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Is hsp70 the cellular thermometer?

E A Craig¹, C A Gross

¹Department of Physiological Chemistry, University of Wisconsin-Madison 53706.

Trends in Biochemical Sciences

|April 1, 1991

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Cells produce heat shock proteins when temperature rises. The study suggests heat shock protein 70 (hsp70) acts as a cellular thermometer, regulating the synthesis of all heat shock proteins.

Area of Science:

Cellular Biology
Molecular Biology
Stress Response

Background:

Cells activate heat shock protein (HSP) synthesis in response to elevated temperatures.
HSPs are a conserved group of proteins crucial for cellular protection.
The precise regulatory mechanism of HSP expression remains under investigation.

Purpose of the Study:

To review evidence supporting a novel role for hsp70 in temperature sensing.
To propose hsp70 as a key regulator of the heat shock response.

Main Methods:

Review of existing scientific literature on heat shock proteins and cellular thermoregulation.
Analysis of data implicating hsp70 in the regulation of heat shock gene expression.

Main Results:

Related Experiment Videos

Evidence suggests the free pool of hsp70 functions as a cellular thermometer.
Hsp70 levels directly correlate with the regulation of all heat shock protein synthesis.

Conclusions:

The free pool of hsp70 is proposed as the primary cellular sensor for temperature changes.
Hsp70's role as a thermometer provides a unified mechanism for regulating the heat shock response.