Mitochondrial intermediate peptidase

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Mitochondrial intermediate peptidase
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EC no. 3.4.24.59
CAS no. 136447-30-8
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Mitochondrial intermediate peptidase (EC 3.4.24.59, mitochondrial intermediate precursor-processing proteinase, MIP) is an enzyme. [1] [2] This enzyme catalyses the following chemical reaction

Release of an N-terminal octapeptide as second stage of processing of some proteins imported into the mitochondrion

This enzyme is a homologue of thimet oligopeptidase.

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Inner mitochondrial membrane peptidase subunit 2 (IMMP2L) is an enzyme that in humans is encoded by the IMMP2L gene on chromosome 7. This protein catalyzes the removal of transit peptides required for the targeting of proteins from the mitochondrial matrix, across the inner membrane, into the intermembrane space. IMMP2L processes the nuclear encoded protein DIABLO.

References

  1. Isaya G, Kalousek F, Rosenberg LE (April 1992). "Amino-terminal octapeptides function as recognition signals for the mitochondrial intermediate peptidase". The Journal of Biological Chemistry. 267 (11): 7904–10. doi: 10.1016/S0021-9258(18)42598-7 . PMID   1560019.
  2. Isaya G, Kalousek F, Rosenberg LE (September 1992). "Sequence analysis of rat mitochondrial intermediate peptidase: similarity to zinc metallopeptidases and to a putative yeast homologue". Proceedings of the National Academy of Sciences of the United States of America. 89 (17): 8317–21. doi: 10.1073/pnas.89.17.8317 . PMC   49909 . PMID   1518864.