Asset Details
Do you wish to reserve the book?
Cytochrome c lysine acetylation regulates cellular respiration and cell death in ischemic skeletal muscle
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Cytochrome c lysine acetylation regulates cellular respiration and cell death in ischemic skeletal muscle
Do you wish to request the book?
Cytochrome c lysine acetylation regulates cellular respiration and cell death in ischemic skeletal muscle
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Cytochrome c lysine acetylation regulates cellular respiration and cell death in ischemic skeletal muscle
2023
Overview
Skeletal muscle is more resilient to ischemia-reperfusion injury than other organs. Tissue specific post-translational modifications of cytochrome
c
(Cyt
c
) are involved in ischemia-reperfusion injury by regulating mitochondrial respiration and apoptosis. Here, we describe an acetylation site of Cyt
c
, lysine 39 (K39), which was mapped in ischemic porcine skeletal muscle and removed by sirtuin5 in vitro. Using purified protein and cellular double knockout models, we show that K39 acetylation and acetylmimetic K39Q replacement increases cytochrome
c
oxidase (COX) activity and ROS scavenging while inhibiting apoptosis via decreased binding to Apaf-1, caspase cleavage and activity, and cardiolipin peroxidase activity. These results are discussed with X-ray crystallography structures of K39 acetylated (1.50 Å) and acetylmimetic K39Q Cyt
c
(1.36 Å) and NMR dynamics. We propose that K39 acetylation is an adaptive response that controls electron transport chain flux, allowing skeletal muscle to meet heightened energy demand while simultaneously providing the tissue with robust resilience to ischemia-reperfusion injury.
The authors report that acetylation of cytochrome
c
on K39 acts as a molecular switch in ischemic skeletal muscle, but not other tissues, to increase respiration and prevent apoptosis. This gives skeletal muscle robust resilience to ischemia and ischemia-reperfusion injury.
