Functional prediction and characterization of Dip2 gene in mice.

Disconnected interacting protein 2 (DIP2) is a highly conserved protein family among invertebrates and vertebrates, but its function remains unclear. In this paper, we summarized the conservation of gene sequences and protein domains of DIP2 family members and predicted that they may have a similar functional role in acetyl-coenzyme A (acetyl-CoA) synthesis. We then used the most characterized member, disconnected interacting protein 2 homolog A (DIP2A), for further study. DIP2A is a cytoplasmic protein that is preferentially localized to mitochondria, and its acetyl-CoA synthetase activity has been demonstrated in vitro. Furthermore, the level of acetyl-CoA in HEK293 cells overexpressing DIP2A was increased, which is consistent with its metabolically related function. Together, these data enrich the evolutionary and functional characterization of dip2 genes and provide significant insights into the identification and application of other homologs of DIP2.

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