Increased ubiquitin-dependent degradation can replace the essential requirement for heat shock protein induction.

Abstract excerpt

Serine palmitoyltransferase, the first enzyme in ceramide biosynthesis, is required for resistance to heat shock. We show that increased heat shock sensitivity in the absence of serine palmitoyltransferase activity correlates with a lack of induction of the major heat shock proteins (Hsps) at high temperature. Normal heat shock resistance can be restored, without restoration of ceramide synthesis or induction of...

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