Essential core component of the TIM22 complex, a complex that mediates the import and insertion of multi-pass transmembrane proteins into the mitochondrial inner membrane. Arabidopsis thaliana (taxid: 3702)
Essential core component of the TIM22 complex, a complex that mediates the import and insertion of multi-pass transmembrane proteins into the mitochondrial inner membrane.
Arabidopsis thaliana (taxid: 3702)
Close Homologs in the Non-Redundant Database Detected by BLAST
>gi|255554696|ref|XP_002518386.1| protein with unknown function [Ricinus communis] gi|223542481|gb|EEF44022.1| protein with unknown function [Ricinus communis]
Score = 34.9 bits (81), Expect = 0.002
Identities = 15/26 (57%), Positives = 15/26 (57%)
Query: 74 GDSGGPKAACAGCAGFAAFSVLIEKF 99
G GGPKAA G A AAFS IE
Sbjct: 99 GLRGGPKAAAVGAAVGAAFSAAIEGL 124
The pre-protein translocase of the mitochondrial outer membrane (Tom) allows the import of pre-proteins from the cytoplasm. Tom forms a complex with a number of proteins, including Tim17. Tim17 and Tim23 are thought to form the translocation channel of the inner membrane. This family includes Tim17, Tim22 and Tim23. This family also includes Pmp24 a peroxisomal protein. The involvement of this domain in the targeting of PMP24 remains to be proved. PMP24 was known as Pmp27 in. Length = 128
>PF02466 Tim17: Tim17/Tim22/Tim23/Pmp24 family; InterPro: IPR003397 The membrane-embedded multi-protein complexes of mitochondria mediate the transport of nuclear-encoded proteins across and into the outer or inner mitochondrial membranes []
The TOM (translocase of the outer mitochondrial membrane) complex consists of cytosol-exposed receptors and a pore-forming core, and mediates the transport of proteins from the cytosol across and into the outer mitochondrial membrane. A novel protein complex in the outer membrane of mitochondria, called the SAM complex (sorting and assembly machinery), is involved in the biogenesis of beta-barrel proteins of the outer membrane. Two translocases of the inner mitochondrial membrane (TIM22 and TIM23 complexes) mediate protein transport at the inner membrane. The TIM23 complex (a presequence translocase) mediates the transport of presequence-containing proteins across and into the inner membrane. Tim23 and Tim17 form part of this complex. Tim23 forms a pore in the inner membrane. The role of Tim17 is not yet fully understood. The TIM22 complex (a twin-pore carrier translocase) catalyses the insertion of multi-spanning proteins that have internal targeting signals into the inner membrane. The TIM22 complex mediates the membrane insertion of multi-spanning inner-membrane proteins that have internal targeting signals, and it uses the membrane potential as an external driving force. The Tim22 subunit of the mitochondrial import inner membrane translocase is included in this family. This family also includes Pmp24, a peroxisomal membrane protein, and NADH ubiquinone dehydrogenase 1 alpha subunit 11. Pmp24 was previously known as Pmp27 [].
