- PDB-6vcd: Cryo-EM structure of IRP2-FBXL5-SKP1 complex -
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基本情報
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データベース: PDB / ID: 6vcd
タイトル
Cryo-EM structure of IRP2-FBXL5-SKP1 complex
要素
F-box/LRR-repeat protein 5
Iron-responsive element binding protein 2, isoform CRA_a
S-phase kinase-associated protein 1
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
Iron regulatory protein 2 / Aconitase/Iron-responsive element-binding protein 2 / Aconitase A, swivel domain / FBXL5-like, hemerythrin-like domain / Aconitase/3-isopropylmalate dehydratase large subunit, alpha/beta/alpha domain / Aconitase/3-isopropylmalate dehydratase large subunit, alpha/beta/alpha, subdomain 1/3 / Aconitase family, 4Fe-4S cluster binding site / Aconitase, iron-sulfur domain / Aconitase family (aconitate hydratase) / Aconitase family signature 1. ...Iron regulatory protein 2 / Aconitase/Iron-responsive element-binding protein 2 / Aconitase A, swivel domain / FBXL5-like, hemerythrin-like domain / Aconitase/3-isopropylmalate dehydratase large subunit, alpha/beta/alpha domain / Aconitase/3-isopropylmalate dehydratase large subunit, alpha/beta/alpha, subdomain 1/3 / Aconitase family, 4Fe-4S cluster binding site / Aconitase, iron-sulfur domain / Aconitase family (aconitate hydratase) / Aconitase family signature 1. / Aconitase family signature 2. / Aconitase A/isopropylmalate dehydratase small subunit, swivel domain / Aconitase C-terminal domain / Aconitase/3-isopropylmalate dehydratase, swivel / Hemerythrin-like / Hemerythrin HHE cation binding domain / Leucine-rich repeat, cysteine-containing subtype / Leucine-rich repeat - CC (cysteine-containing) subfamily / A Receptor for Ubiquitination Targets / F-box domain profile. / F-box-like domain superfamily / F-box-like / SKP1 component, dimerisation / S-phase kinase-associated protein 1 / SKP1-like, dimerisation domain superfamily / Skp1 family, dimerisation domain / F-box domain / Leucine Rich repeat / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / SKP1/BTB/POZ domain superfamily / Leucine-rich repeat / Leucine-rich repeat domain superfamily 類似検索 - ドメイン・相同性
FE2/S2 (INORGANIC) CLUSTER / Iron-responsive element-binding protein 2 / Iron-responsive element-binding protein 2 / S-phase kinase-associated protein 1 / F-box/LRR-repeat protein 5 類似検索 - 構成要素
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.
S-phasekinase-associatedprotein1 / SKP1 / Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of ...SKP1 / Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of Corti protein II / OCP-II / RNA polymerase II elongation factor-like protein / SIII / Transcription elongation factor B polypeptide 1-like / p19skp1