TIMM23 SORT:Precursor Cargo TIMM23 SORT:Cargo MPP Cleaves Presequence of Inner Membrane Precursors As inferred from yeast, the alpha subunit of the mitochondrial processing peptidase (MPP) binds presequences of mitochondrial precursors and the beta subunit cleaves the presequence. After cleavage, proteins destined for the inner membrane are released laterally from TIMM23 SORT into the membrane. Authored: May, B, 2011-05-21 EC Number: 3.4.24 Edited: May, B, 2011-05-21 Pubmed18174896 Pubmed19453276 Reactome Database ID Release 431299476 Reactome, http://www.reactome.org ReactomeREACT_118813 Reviewed: D'Eustachio, P, 2011-11-01 Reviewed: Endo, T, 2012-02-12