+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6vcd | ||||||
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タイトル | Cryo-EM structure of IRP2-FBXL5-SKP1 complex | ||||||
要素 |
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キーワード | LIGASE / E3 ligase / [2Fe-2S] cluster / Iron metabolism | ||||||
機能・相同性 | 機能・相同性情報 aconitate hydratase activity / iron-responsive element binding / : / F-box domain binding / citrate metabolic process / PcG protein complex / protoporphyrinogen IX biosynthetic process / Cul7-RING ubiquitin ligase complex / positive regulation of ubiquitin protein ligase activity / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling ...aconitate hydratase activity / iron-responsive element binding / : / F-box domain binding / citrate metabolic process / PcG protein complex / protoporphyrinogen IX biosynthetic process / Cul7-RING ubiquitin ligase complex / positive regulation of ubiquitin protein ligase activity / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / maintenance of protein location in nucleus / intestinal absorption / erythrocyte homeostasis / SCF ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Prolactin receptor signaling / protein monoubiquitination / Association of TriC/CCT with target proteins during biosynthesis / cullin family protein binding / ubiquitin-like ligase-substrate adaptor activity / protein K48-linked ubiquitination / Nuclear events stimulated by ALK signaling in cancer / ubiquitin ligase complex / translation repressor activity / tricarboxylic acid cycle / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / osteoclast differentiation / post-embryonic development / molecular function activator activity / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Vpu mediated degradation of CD4 / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of GLI1 by the proteasome / Activation of NF-kappaB in B cells / Negative regulation of NOTCH4 signaling / Iron uptake and transport / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of beta-catenin by the destruction complex / NOTCH1 Intracellular Domain Regulates Transcription / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / 2 iron, 2 sulfur cluster binding / multicellular organismal-level iron ion homeostasis / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / beta-catenin binding / FCERI mediated NF-kB activation / Interleukin-1 signaling / Orc1 removal from chromatin / positive regulation of protein catabolic process / protein polyubiquitination / ubiquitin-protein transferase activity / Regulation of RUNX2 expression and activity / Cyclin D associated events in G1 / Regulation of PLK1 Activity at G2/M Transition / Circadian Clock / Antigen processing: Ubiquitination & Proteasome degradation / Downstream TCR signaling / Neddylation / iron ion transport / 4 iron, 4 sulfur cluster binding / proteasome-mediated ubiquitin-dependent protein catabolic process / intracellular iron ion homeostasis / protein ubiquitination / chromatin remodeling / iron ion binding / protein domain specific binding / centrosome / perinuclear region of cytoplasm / mitochondrion / RNA binding / nucleoplasm / nucleus / metal ion binding / cytosol / cytoplasm 類似検索 - 分子機能 | ||||||
生物種 | Homo sapiens (ヒト) | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3 Å | ||||||
データ登録者 | Wang, H. / Shi, H. / Zheng, N. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Mol Cell / 年: 2020 タイトル: FBXL5 Regulates IRP2 Stability in Iron Homeostasis via an Oxygen-Responsive [2Fe2S] Cluster. 著者: Hui Wang / Hui Shi / Malini Rajan / Elizabeth R Canarie / Seoyeon Hong / Daniele Simoneschi / Michele Pagano / Matthew F Bush / Stefan Stoll / Elizabeth A Leibold / Ning Zheng / 要旨: Cellular iron homeostasis is dominated by FBXL5-mediated degradation of iron regulatory protein 2 (IRP2), which is dependent on both iron and oxygen. However, how the physical interaction between ...Cellular iron homeostasis is dominated by FBXL5-mediated degradation of iron regulatory protein 2 (IRP2), which is dependent on both iron and oxygen. However, how the physical interaction between FBXL5 and IRP2 is regulated remains elusive. Here, we show that the C-terminal substrate-binding domain of FBXL5 harbors a [2Fe2S] cluster in the oxidized state. A cryoelectron microscopy (cryo-EM) structure of the IRP2-FBXL5-SKP1 complex reveals that the cluster organizes the FBXL5 C-terminal loop responsible for recruiting IRP2. Interestingly, IRP2 binding to FBXL5 hinges on the oxidized state of the [2Fe2S] cluster maintained by ambient oxygen, which could explain hypoxia-induced IRP2 stabilization. Steric incompatibility also allows FBXL5 to physically dislodge IRP2 from iron-responsive element RNA to facilitate its turnover. Taken together, our studies have identified an iron-sulfur cluster within FBXL5, which promotes IRP2 polyubiquitination and degradation in response to both iron and oxygen concentrations. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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構造ビューア | 分子: MolmilJmol/JSmol |
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 6vcd.cif.gz | 205.5 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6vcd.ent.gz | 151.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6vcd.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/vc/6vcd ftp://data.pdbj.org/pub/pdb/validation_reports/vc/6vcd | HTTPS FTP |
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-関連構造データ
-リンク
-集合体
登録構造単位 |
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1 |
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-要素
#1: タンパク質 | 分子量: 105165.328 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: IREB2, hCG_38938 / 発現宿主: Trichoplusia ni (イラクサキンウワバ) / 参照: UniProt: D3DW85, UniProt: P48200*PLUS |
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#2: タンパク質 | 分子量: 54832.441 Da / 分子数: 1 / Fragment: UNP residues 183-674 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: FBXL5, FBL4, FBL5, FLR1 / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: Q9UKA1 |
#3: タンパク質 | 分子量: 18679.965 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SKP1, EMC19, OCP2, SKP1A, TCEB1L / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P63208 |
#4: 化合物 | ChemComp-FES / |
研究の焦点であるリガンドがあるか | Y |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: IRP2-FBLX5-SKP1 complex / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Trichoplusia ni (イラクサキンウワバ) |
緩衝液 | pH: 8 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | 詳細: unspecified |
急速凍結 | 凍結剤: ETHANE |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: OTHER |
電子レンズ | モード: BRIGHT FIELD |
撮影 | 電子線照射量: 73.8 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
ソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 955060 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 立体化学のターゲット値: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
拘束条件 |
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