Figure 4. Models of translocation of HCMV pUL37x1\vMIA protein from the MAM to the OMM.
Detail of the proximity between the MAM and mitochondria is shown. The lipid enriched membrane of the MAM is represented (blue region) in the membrane. Complexes stabilizing the ER-mitochondrial contacts (PACS-2, Mfn2, and IP3R-Grp75-VDAC) are represented as well. Tethers observed by Csordas et al. [22] may serve as sites for direct transfer of pUL37x1\vMIA. Alternatively, lipid rich membrane domains may be distorted allowing close proximity between the membranes and the generation of vesicles/microvesicles or as lipid rafts that may traffic to the OMM. The key of the symbols is at the bottom of the figure.