Heat shock protein (HSP) expression
nounPronunciation: /ˌhiːt ʃɒk ˈproʊtiːn ɪkˈsprɛʃən/
The stress-induced synthesis of molecular chaperone proteins that prevent protein misfolding, facilitate refolding of denatured proteins, and promote degradation of irreversibly damaged proteins under elevated temperature and other abiotic stresses. HSP families include HSP70, HSP90, and small HSPs, which are essential for cellular proteostasis maintenance.
Plain English
Plants produce protective proteins during heat stress that prevent other proteins from damage and help repair damaged ones.
Etymology & History
Usage
"Heat shock protein expression increased 8-fold in heat-tolerant tomato cultivars exposed to 45°C for 2 hours."
Style guide notes: Use abbreviation 'HSP' after first full mention; specify family designation (HSP70, HSP90) when discussing specific isoforms.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What do heat shock proteins do in cells?
HSPs assist protein folding, prevent aggregation, facilitate refolding, and target damaged proteins for degradation.
Are HSPs specific to heat stress?
While primary response to heat, HSPs also activate during cold, drought, salinity, and oxidative stress.
Why Test Candidates on This?
Critical for evaluating heat tolerance mechanisms, predicting cultivar performance under heat stress, and understanding molecular basis of thermal stress adaptation.
Required skill level: Mid