National Institutes of Health/National Cancer Institute (NIH/NCI)
P30CA016087
米国
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
5R01AI174646-02
米国
引用
ジャーナル: Proc Natl Acad Sci U S A / 年: 2024 タイトル: Identification of a depupylation regulator for an essential enzyme in . 著者: Shoshanna C Kahne / Jin Hee Yoo / James Chen / Kehilwe Nakedi / Lakshminarayan M Iyer / Gregory Putzel / Nora M Samhadaneh / Alejandro Pironti / L Aravind / Damian C Ekiert / Gira Bhabha / ...著者: Shoshanna C Kahne / Jin Hee Yoo / James Chen / Kehilwe Nakedi / Lakshminarayan M Iyer / Gregory Putzel / Nora M Samhadaneh / Alejandro Pironti / L Aravind / Damian C Ekiert / Gira Bhabha / Kyu Y Rhee / K Heran Darwin / 要旨: In , proteins that are posttranslationally modified with a prokaryotic ubiquitin-like protein (Pup) can be degraded by bacterial proteasomes. A single Pup-ligase and depupylase shape the pupylome, ...In , proteins that are posttranslationally modified with a prokaryotic ubiquitin-like protein (Pup) can be degraded by bacterial proteasomes. A single Pup-ligase and depupylase shape the pupylome, but the mechanisms regulating their substrate specificity are incompletely understood. Here, we identified a depupylation regulator, a protein called CoaX, through its copurification with the depupylase Dop. CoaX is a pseudopantothenate kinase that showed evidence of binding to pantothenate, an essential nutrient synthesizes, but not its phosphorylation. In a ∆ mutant, pantothenate synthesis enzymes including PanB, a substrate of the Pup-proteasome system (PPS), were more abundant than in the parental strain. In vitro, CoaX specifically accelerated depupylation of Pup~PanB, while addition of pantothenate inhibited this reaction. In culture, media supplementation with pantothenate decreased PanB levels, which required CoaX. Collectively, we propose CoaX regulates PanB abundance in response to pantothenate levels by modulating its vulnerability to proteolysis by proteasomes.