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. 2021 Jun 9;33(9):3076–3103. doi: 10.1093/plcell/koab179

Figure 9.

Figure 9

Model for the function of SEIPIN, LDIP, and LDAP in LD biogenesis in plants. The model depicts the association of individual LDIP and SEIPIN proteins at the ER membrane, via LDIP binding to the HH of the SEIPIN protein (refer to model of the Arabidopsis SEIPIN1 protein within the ER membrane in Supplemental Figure S5A), and akin to the interaction of LDAF1 and SEIPIN in mammals. As the TAG “lens” grows, LDIP dissociates from SEIPIN and is stabilized on the LD surface through interaction with LDAP. See main text for additional details. Adapted partly from Chung et al. (2019), Coulon et al. (2020), and Prasanna et al. (2021).