ID 3.4.11.26 DE intermediate cleaving peptidase 55. CA The enzyme cleaves the 36-Pro-Pro-37 bond of cysteine desulfurase CA (EC 2.8.1.7) removing three amino acid residues (Tyr-Ser-Pro) from the CA N-terminus after cleavage by mitochondrial processing peptidase. CC -!- Icp55 removes the destabilizing N-terminal amino acid residues that CC are left after cleavage by the mitochondrial processing peptidase, CC leading to the stabilization of the substrate. CC -!- The enzyme can remove single amino acids or a short peptide, as in CC the case of cysteine desulfurase (EC 2.8.1.7), where three amino CC acids are removed. DR Q10439, ICP55_SCHPO; P40051, ICP55_YEAST; //