DNA segregation in mitochondria and beyond: insights from the trypanosomal tripartite attachment complex

Trends Biochem Sci. 2023 Sep 27:S0968-0004(23)00224-4. doi: 10.1016/j.tibs.2023.08.012. Online ahead of print.ABSTRACTThe tripartite attachment complex (TAC) of the single mitochondrion of trypanosomes allows precise segregation of its single nucleoid mitochondrial genome during cytokinesis. It couples the segregation of the duplicated mitochondrial genome to the segregation of the basal bodies of the flagella. Here, we provide a model of the molecular architecture of the TAC that explains how its eight essential subunits connect the basal body, across the mitochondrial membranes, with the mitochondrial genome. We also discuss how the TAC subunits are imported into the mitochondrion and how they assemble to form a new TAC. Finally, we present a comparative analysis of the trypanosomal TAC with open and closed mitotic spindles, which reveals conserved concepts between these diverse DNA segregation systems.PMID:37775421 | DOI:10.1016/j.tibs.2023.08.012
Source: Trends in Biochemical Sciences - Category: Biochemistry Authors: Source Type: research