Genetic complementation in yeast reveals functional similarities between the catalytic subunits of mammalian signal peptidase complex.

Abstract excerpt

Type I signal peptidases (SPs) comprise a family of structurally related enzymes that cleave signal peptides from precursor proteins following their transport out of the cytoplasmic space in eukaryotic and prokaryotic cells. One such enzyme, the mitochondrial inner membrane peptidase, has two catalytic subunits, which recognize distinct cleavage site motifs in their signal peptide substrates. The only other known...

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