Figure 6.

Model of the Functions of CHMP1 and ATG Proteins in the Autophagy-Dependent Degradation of Plastid Material.

Autophagic components mediate the release of RCBs containing plastid cargo into the cytoplasm. Impaired sequestration of this cargo into autophagosomes in the absence of CHMP1 causes the accumulation of phagophore-like structures and cytoplasmic RCBs and compromises the autophagic turnover of stromal and envelope proteins. Abnormally high levels of plastid division proteins such as FTSZ2 and PDV1 interfere with plastid division, leading to plastid clustering.