1. CDP-DAG synthesis by peripheral membrane-bound Tam41-type enzymes.
- Author
-
Okamoto K
- Subjects
- Schizosaccharomyces enzymology, Schizosaccharomyces metabolism, Schizosaccharomyces pombe Proteins metabolism, Schizosaccharomyces pombe Proteins chemistry, Cytidine Triphosphate metabolism, Membrane Proteins metabolism, Membrane Proteins chemistry, Nucleotidyltransferases metabolism, Nucleotidyltransferases chemistry, Nucleotidyltransferases genetics, Cytidine Diphosphate Diglycerides metabolism
- Abstract
Cytidine diphosphate diacylglycerol (CDP-DAG) is a critical intermediate that is converted to multiple phospholipids in prokaryotes and eukaryotes. In budding yeast, CDP-DAG synthesis from cytidine triphosphate (CTP) and phosphatidic acid (PA) is catalyzed by the membrane-integrated protein Cds1 in the endoplasmic reticulum and the peripheral membrane-bound protein Tam41 in mitochondria. Although a recent study revealed that the fission yeast SpTam41 consists of a nucleotidyltransferase domain and a winged helix domain, forming an active-site pocket for CTP binding between the two domains together with a C-terminal amphipathic helix for membrane association, how CTP and Mg 2+, a most-favoured divalent cation, are accommodated with PA remains obscure. A more recent report by Kimura et al. (J. Biochem. 2022; 171:429-441) solved the crystal structure of FbTam41, a functional ortholog from a Firmicutes bacterium, with CTP-Mg 2+, successfully providing a detailed molecular view of CDP-DAG synthesis. In this commentary, our current understanding of Tam41-mediated reaction is discussed., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Japanese Biochemical Society. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2024
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