- PDB-6w4s: Structure of apo human ferroportin in lipid nanodisc -
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基本情報
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データベース: PDB / ID: 6w4s
タイトル
Structure of apo human ferroportin in lipid nanodisc
要素
Fab45D8 Heavy Chain
Fab45D8 Light Chain
Solute carrier family 40 member 1
キーワード
TRANSPORT PROTEIN/IMMUNE SYSTEM / ferroportin / transporter / iron / hepcidin / TRANSPORT PROTEIN-IMMUNE SYSTEM complex
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 / iron ion transmembrane transporter activity / endothelium development ...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 / iron ion transmembrane transporter activity / endothelium development / iron ion transmembrane transport / peptide hormone binding / establishment of localization in cell / Iron uptake and transport / multicellular organismal-level iron ion homeostasis / synaptic vesicle / transcription by RNA polymerase II / basolateral plasma membrane / intracellular iron ion homeostasis / apoptotic process / negative regulation of apoptotic process / positive regulation of transcription by RNA polymerase II / nucleoplasm / membrane / metal ion binding / identical protein binding / plasma membrane / cytoplasm / cytosol 類似検索 - 分子機能
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
1DP5OD023048
米国
引用
ジャーナル: Nature / 年: 2020 タイトル: Structure of hepcidin-bound ferroportin reveals iron homeostatic mechanisms. 著者: Christian B Billesbølle / Caleigh M Azumaya / Rachael C Kretsch / Alexander S Powers / Shane Gonen / Simon Schneider / Tara Arvedson / Ron O Dror / Yifan Cheng / Aashish Manglik / 要旨: The serum level of iron in humans is tightly controlled by the action of the hormone hepcidin on the iron efflux transporter ferroportin. Hepcidin regulates iron absorption and recycling by inducing ...The serum level of iron in humans is tightly controlled by the action of the hormone hepcidin on the iron efflux transporter ferroportin. Hepcidin regulates iron absorption and recycling by inducing the internalization and degradation of ferroportin. Aberrant ferroportin activity can lead to diseases of iron overload, such as haemochromatosis, or iron limitation anaemias. Here we determine cryogenic electron microscopy structures of ferroportin in lipid nanodiscs, both in the apo state and in complex with hepcidin and the iron mimetic cobalt. These structures and accompanying molecular dynamics simulations identify two metal-binding sites within the N and C domains of ferroportin. Hepcidin binds ferroportin in an outward-open conformation and completely occludes the iron efflux pathway to inhibit transport. The carboxy terminus of hepcidin directly contacts the divalent metal in the ferroportin C domain. Hepcidin binding to ferroportin is coupled to iron binding, with an 80-fold increase in hepcidin affinity in the presence of iron. These results suggest a model for hepcidin regulation of ferroportin, in which only ferroportin molecules loaded with iron are targeted for degradation. More broadly, our structural and functional insights may enable more targeted manipulation of the hepcidin-ferroportin axis in disorders of iron homeostasis.
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2020年3月11日
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2020年9月9日
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2020年9月9日
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改定 1.0
2020年9月9日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2020年9月9日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
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