ArticleProceedings of the National Academy of Sciences of the United States of America2025
Switching the strict substrate specificities of the β-ketoacyl-acyl carrier protein synthases, FabH and BioZ.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Balanced Expression of the Diiron Oxygenase BioE Is Essential for Biotin Homeostasis in Elizabethkingia meningoseptica.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
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8 authors.
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Abstract
The β-ketoacyl-acyl carrier protein (ACP) synthases are pivotal elongation enzymes that catalyze the condensation of acyl-CoA or acyl-ACP with malonyl-ACP to produce β-ketoacyl-ACP. Among these, the homologous enzymes FabH (β-ketoacyl-ACP synthase III) and the recently characterized BioZ play crucial roles, initiating the biosynthetic pathways for fatty acids and biotin, respectively. FabH primarily utilizes acetyl-CoA as the primer substrate, whereas BioZ exclusively condenses the longer glutaryl-CoA, which contains a charged ω-carboxyl group. Despite their similar catalytic mechanisms, the molecular bases for the strict substrate specificities remain undetermined. Here, we report crystal structures of the BioZ: glutaryl-CoA cocrystalized complexes and demonstrate the ability to swap the physiological functions and substrate specificities between FabH and BioZ. This functional interchange was achieved by grafting the β8-α9 loop plus residue Ala317 of
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