- EMDB-27499: Cryo-EM structure of human ferroportin/slc40 bound to Co2+ in nanodisc -
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基本情報
登録情報
データベース: EMDB / ID: EMD-27499
タイトル
Cryo-EM structure of human ferroportin/slc40 bound to Co2+ in nanodisc
マップデータ
Unsharpened map of human ferroportin/slc40 bound to Co2 in nanodisc
試料
複合体: Cryo-EM structure of human ferroportin/slc40 bound to Co2+ in nanodisc
タンパク質・ペプチド: Solute carrier family 40 member 1
タンパク質・ペプチド: 11F9 light-chain
タンパク質・ペプチド: 11F9 heavy-chain
リガンド: COBALT (II) ION
リガンド: water
キーワード
SLC40 / Fpn / ferroportin / iron / transporter / cobalt / human / nanodisc / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
spleen trabecula formation / iron ion export across plasma membrane / Defective SLC40A1 causes hemochromatosis 4 (HFE4) (duodenum) / Defective SLC40A1 causes hemochromatosis 4 (HFE4) (macrophages) / Defective CP causes aceruloplasminemia (ACERULOP) / Metal ion SLC transporters / lymphocyte homeostasis / ferrous iron transmembrane transporter activity / endothelium development / iron ion transmembrane transporter activity ...spleen trabecula formation / iron ion export across plasma membrane / Defective SLC40A1 causes hemochromatosis 4 (HFE4) (duodenum) / Defective SLC40A1 causes hemochromatosis 4 (HFE4) (macrophages) / Defective CP causes aceruloplasminemia (ACERULOP) / Metal ion SLC transporters / lymphocyte homeostasis / ferrous iron transmembrane transporter activity / endothelium development / iron ion transmembrane transporter activity / iron ion transmembrane transport / peptide hormone binding / establishment of localization in cell / Iron uptake and transport / multicellular organismal-level iron ion homeostasis / synaptic vesicle / basolateral plasma membrane / transcription by RNA polymerase II / intracellular iron ion homeostasis / apoptotic process / negative regulation of apoptotic process / positive regulation of transcription by RNA polymerase II / nucleoplasm / metal ion binding / identical protein binding / membrane / plasma membrane / cytosol / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)
DK122784
米国
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
HL086392
米国
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
HL157473
米国
Cancer Prevention and Research Institute of Texas (CPRIT)
R1223
米国
引用
ジャーナル: PLoS Biol / 年: 2023 タイトル: Structural basis of ferroportin inhibition by minihepcidin PR73. 著者: Azaan Saalim Wilbon / Jiemin Shen / Piotr Ruchala / Ming Zhou / Yaping Pan / 要旨: Ferroportin (Fpn) is the only known iron exporter in humans and is essential for maintaining iron homeostasis. Fpn activity is suppressed by hepcidin, an endogenous peptide hormone, which inhibits ...Ferroportin (Fpn) is the only known iron exporter in humans and is essential for maintaining iron homeostasis. Fpn activity is suppressed by hepcidin, an endogenous peptide hormone, which inhibits iron export and promotes endocytosis of Fpn. Hepcidin deficiency leads to hemochromatosis and iron-loading anemia. Previous studies have shown that small peptides that mimic the first few residues of hepcidin, i.e., minihepcidins, are more potent than hepcidin. However, the mechanism of enhanced inhibition by minihepcidins remains unclear. Here, we report the structure of human ferroportin in complex with a minihepcidin, PR73 that mimics the first 9 residues of hepcidin, at 2.7 Å overall resolution. The structure reveals novel interactions that were not present between Fpn and hepcidin. We validate PR73-Fpn interactions through binding and transport assays. These results provide insights into how minihepcidins increase inhibition potency and will guide future development of Fpn inhibitors.