Unfolded Protein Response
Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an unfolded protein stimulus.
mitochondrial unfolded protein response
The series of molecular signals generated as a consequence of the presence of unfolded proteins in the mitochondrial matrix; results in transcriptional upregulation of nuclear genes encoding mitochondrial stress proteins.