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. 2013 Nov 11;3(4):943–966. doi: 10.3390/biom3040943

Figure 7.

Figure 7

A diagrammatic representation showing formation of the prespore-specific vacuole (PSV) from a mitochondrion and Golgi vesicles. Prior to PSV formation, mitochondria in differentiating prespore cells undergo drastic transformation to form a sort of vacuole (M vacuole), and some Dd-TRAP1 molecules translocate into the M vacuole. Subsequently, Golgi vesicles containing DIA2, Dd-GRP94 and other materials required for PSV formation fuse with the M vacuole, thus resulting in formation of the lining membrane (red) and the internal fibrous structure in the M vacuole. The mitochondrion-PSV complex is eventually twisted at the junction (arrow) and detached to form the respective organelles. Interestingly, almost all of the DIA2 molecules are selectively translocated to PSVs (possibly M vacuoles) in differentiating prespore cells, and seem to be required for exocytotic secretion of PSVs to form the outer-most membrane of spore cell wall [15]. M-V, M vacuole; GRP94, glucose-regulated protein 94 (endoplasmic reticulum Hsp90). (Slightly modified from Maeda [12]).