Watanabe_2024_Autophagy__1

Reference

Title : The activation mechanism of Atg15, a vacuolar phospholipase required for the disintegration of organelle membranes - Watanabe_2024_Autophagy__1
Author(s) : Watanabe Y , Suzuki K
Ref : Autophagy , :1 , 2024
Abstract :

The disintegration of cytoplasm-to-vacuole targeting (Cvt) bodies and autophagic bodies in vacuoles is essential to the Cvt pathway and macroautophagy in yeast. Atg15 is a vacuolar lipase required for the degradation of both Cvt and autophagic bodies. However, the molecular mechanism of their degradation by Atg15 remains poorly understood. In a recent study, we showed that recombinant Chaetomium thermophilum Atg15 (CtAtg15) possesses phospholipase activity, and that this activity is significantly elevated by proteolytic cleavage at a site away from the active center. The proteolytic cleavage of CtAtg15 causes a conformational change around the active center, resulting in the active open state. Interestingly, activated CtAtg15 can degrade not only Cvt and autophagic bodies but also organelle membranes. On the basis of these results, we propose an activation mechanism by which Atg15, as an "organellase," functions only in vacuoles.

PubMedSearch : Watanabe_2024_Autophagy__1
PubMedID: 38513722
Gene_locus related to this paper: chatd-g0sfg7

Related information

Citations formats

Watanabe Y, Suzuki K (2024)
The activation mechanism of Atg15, a vacuolar phospholipase required for the disintegration of organelle membranes
Autophagy :1

Watanabe Y, Suzuki K (2024)
Autophagy :1