ジャーナル: Sci Adv / 年: 2024 タイトル: Filament structures unveil the dynamic organization of human acetyl-CoA carboxylase. 著者: Fayang Zhou / Yuanyuan Zhang / Yuyao Zhu / Qiang Zhou / Yigong Shi / Qi Hu / 要旨: Human acetyl-coenzyme A (CoA) carboxylases (ACCs) catalyze the carboxylation of acetyl-CoA, which is the rate-limiting step in fatty acid synthesis. The molecular mechanism underlying the dynamic ...Human acetyl-coenzyme A (CoA) carboxylases (ACCs) catalyze the carboxylation of acetyl-CoA, which is the rate-limiting step in fatty acid synthesis. The molecular mechanism underlying the dynamic organization of ACCs is largely unknown. Here, we determined the cryo-electron microscopy (EM) structure of human ACC1 in its inactive state, which forms a unique filament structure and is in complex with acetyl-CoA. We also determined the cryo-EM structure of human ACC1 activated by dephosphorylation and citrate treatment, at a resolution of 2.55 Å. Notably, the covalently linked biotin binds to a site that is distant from the acetyl-CoA binding site when acetyl-CoA is absent, suggesting a potential coordination between biotin binding and acetyl-CoA binding. These findings provide insights into the structural dynamics and regulatory mechanisms of human ACCs.
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登録
2023年12月25日
登録サイト: PDBJ / 処理サイト: PDBJ
改定 1.0
2024年10月23日
Provider: repository / タイプ: Initial release
改定 1.1
2024年11月20日
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