Disulfide formation in the mitochondrial intermembrane space (IMS) is an essential process. It is catalyzed by the disulfide relay machinery, which couples substrate import and oxidation. The machinery relies on the oxidoreductase and chaperone CHCHD4-Mia40. Here, we report on the driving force for IMS import and on a redox quality control mechanism. We demonstrate that unfolded reduced proteins, upon translocation into the IMS, initiate formation of a metastable disulfide-linked complex with CHCHD4. If this interaction does not result in productive oxidation, then substrates are released to the cytosol and degraded by the proteasome. Based on these data, we propose a redox quality control step at the level of the disulfide-linked intermediate that relies on the vectorial nature of IMS import. Our findings also provide the mechanistic framework to explain failures in import of numerous human disease mutants in CHCHD4 substrates.
Pubmed ID: 30650365 RIS Download
Publication data is provided by the National Library of Medicine ® and PubMed ®. Data is retrieved from PubMed ® on a weekly schedule. For terms and conditions see the National Library of Medicine Terms and Conditions.
Non-profit plasmid repository dedicated to helping scientists around the world share high-quality plasmids. Facilitates archiving and distributing DNA-based research reagents and associated data to scientists worldwide. Repository contains over 65,000 plasmids, including special collections on CRISPR, fluorescent proteins, and ready-to-use viral preparations. There is no cost for scientists to deposit plasmids, which saves time and money associated with shipping plasmids themselves. All plasmids are fully sequenced for validation and sequencing data is openly available. We handle the appropriate Material Transfer Agreements (MTA) with institutions, facilitating open exchange and offering intellectual property and liability protection for depositing scientists. Furthermore, we curate free educational resources for the scientific community including a blog, eBooks, video protocols, and detailed molecular biology resources.
View all literature mentionsSoftware package as distribution of ImageJ and ImageJ2 together with Java, Java3D and plugins organized into coherent menu structure. Used to assist research in life sciences.
View all literature mentionsThis polyclonal secondary targets IgG (H+L)
View all literature mentionsThis monoclonal targets PDH-E1α
View all literature mentionsThis polyclonal targets Smac antibody produced in rabbit
View all literature mentionsThis monoclonal targets GAPDH (6C5)
View all literature mentionsThis monoclonal targets TIMM8A
View all literature mentionsThis polyclonal targets CHCHD6 antibody produced in rabbit
View all literature mentionsThis monoclonal targets HSP 70 (C92F3A-5)
View all literature mentionsThis polyclonal targets COX6B1
View all literature mentionsThis polyclonal targets CMC1 antibody produced in rabbit
View all literature mentionsThis monoclonal targets Tim9A (SA-19)
View all literature mentionsThis polyclonal targets HA-Tag antibody produced in rabbit
View all literature mentionsThis monoclonal targets Cytochrome c
View all literature mentionsThis monoclonal targets LDH (H-10)
View all literature mentions