+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8t1j | ||||||
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タイトル | Uncrosslinked nNOS-CaM oxygenase homodimer | ||||||
要素 | Nitric oxide synthase 1 | ||||||
キーワード | CYTOSOLIC PROTEIN / Calmodulin / Complex | ||||||
機能・相同性 | 機能・相同性情報 Nitric oxide stimulates guanylate cyclase / negative regulation of hepatic stellate cell contraction / positive regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / synaptic signaling by nitric oxide / negative regulation of iron ion transmembrane transport / ROS and RNS production in phagocytes / azurophil granule / negative regulation of vasoconstriction / retrograde trans-synaptic signaling by nitric oxide / positive regulation of sodium ion transmembrane transport ...Nitric oxide stimulates guanylate cyclase / negative regulation of hepatic stellate cell contraction / positive regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / synaptic signaling by nitric oxide / negative regulation of iron ion transmembrane transport / ROS and RNS production in phagocytes / azurophil granule / negative regulation of vasoconstriction / retrograde trans-synaptic signaling by nitric oxide / positive regulation of sodium ion transmembrane transport / response to nitric oxide / nitric oxide metabolic process / postsynaptic specialization, intracellular component / positive regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / Ion homeostasis / negative regulation of cytosolic calcium ion concentration / peptidyl-cysteine S-nitrosylation / cadmium ion binding / positive regulation of the force of heart contraction / calyx of Held / negative regulation of potassium ion transport / behavioral response to cocaine / negative regulation of calcium ion transport / negative regulation of serotonin uptake / regulation of neurogenesis / nitric-oxide synthase (NADPH) / response to vitamin E / sodium channel regulator activity / regulation of postsynaptic membrane potential / postsynaptic density, intracellular component / negative regulation of insulin secretion / nitric oxide mediated signal transduction / multicellular organismal response to stress / nitric-oxide synthase activity / xenobiotic catabolic process / NADPH binding / arginine catabolic process / striated muscle contraction / regulation of sodium ion transport / nitric oxide-cGMP-mediated signaling / T-tubule / response to organonitrogen compound / sarcoplasmic reticulum membrane / cellular response to epinephrine stimulus / nitric oxide biosynthetic process / negative regulation of blood pressure / photoreceptor inner segment / response to nutrient levels / response to hormone / response to activity / secretory granule / sarcoplasmic reticulum / positive regulation of long-term synaptic potentiation / establishment of localization in cell / muscle contraction / cell periphery / female pregnancy / phosphoprotein binding / response to lead ion / response to nicotine / potassium ion transport / establishment of protein localization / response to organic cyclic compound / cellular response to growth factor stimulus / sarcolemma / response to peptide hormone / Z disc / cellular response to mechanical stimulus / response to estrogen / vasodilation / calcium ion transport / calcium-dependent protein binding / FMN binding / positive regulation of peptidyl-serine phosphorylation / NADP binding / flavin adenine dinucleotide binding / ATPase binding / response to heat / scaffold protein binding / nuclear membrane / response to ethanol / mitochondrial outer membrane / transmembrane transporter binding / negative regulation of neuron apoptotic process / response to lipopolysaccharide / dendritic spine / postsynaptic density / cytoskeleton / calmodulin binding / response to hypoxia / membrane raft / negative regulation of cell population proliferation / glutamatergic synapse / synapse / dendrite / heme binding / negative regulation of apoptotic process / positive regulation of DNA-templated transcription / perinuclear region of cytoplasm / enzyme binding 類似検索 - 分子機能 | ||||||
生物種 | Rattus norvegicus (ドブネズミ) | ||||||
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: 2.7 Å | ||||||
データ登録者 | Lee, K. / Pospiech, T.H. / Southworth, D. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: J Biol Chem / 年: 2024 タイトル: Mapping interactions of calmodulin and neuronal NO synthase by crosslinking and mass spectrometry. 著者: Dana Felker / Kanghyun Lee / Thomas H Pospiech / Yoshihiro Morishima / Haoming Zhang / Miranda Lau / Daniel R Southworth / Yoichi Osawa / 要旨: Neuronal nitric oxide synthase (nNOS) is a homodimeric cytochrome P450-like enzyme that catalyzes the conversion of L-arginine to nitric oxide in the presence of NADPH and molecular oxygen. The ...Neuronal nitric oxide synthase (nNOS) is a homodimeric cytochrome P450-like enzyme that catalyzes the conversion of L-arginine to nitric oxide in the presence of NADPH and molecular oxygen. The binding of calmodulin (CaM) to a linker region between the FAD/FMN-containing reductase domain, and the heme-containing oxygenase domain is needed for electron transfer reactions, reduction of the heme, and NO synthesis. Due to the dynamic nature of the reductase domain and low resolution of available full-length structures, the exact conformation of the CaM-bound active complex during heme reduction is still unresolved. Interestingly, hydrogen-deuterium exchange and mass spectrometry studies revealed interactions of the FMN domain and CaM with the oxygenase domain for iNOS, but not nNOS. This finding prompted us to utilize covalent crosslinking and mass spectrometry to clarify interactions of CaM with nNOS. Specifically, MS-cleavable bifunctional crosslinker disuccinimidyl dibutyric urea was used to identify thirteen unique crosslinks between CaM and nNOS as well as 61 crosslinks within the nNOS. The crosslinks provided evidence for CaM interaction with the oxygenase and reductase domain residues as well as interactions of the FMN domain with the oxygenase dimer. Cryo-EM studies, which gave a high-resolution model of the oxygenase domain, along with crosslink-guided docking provided a model of nNOS that brings the FMN within 15 Å of the heme in support for a more compact conformation than previously observed. These studies also point to the utility of covalent crosslinking and mass spectrometry in capturing transient dynamic conformations that may not be captured by hydrogen-deuterium exchange and mass spectrometry experiments. | ||||||
履歴 |
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-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
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-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8t1j.cif.gz | 198.7 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb8t1j.ent.gz | 130.7 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8t1j.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
文書・要旨 | 8t1j_validation.pdf.gz | 1.4 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 8t1j_full_validation.pdf.gz | 1.4 MB | 表示 | |
XML形式データ | 8t1j_validation.xml.gz | 36.5 KB | 表示 | |
CIF形式データ | 8t1j_validation.cif.gz | 51.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/t1/8t1j ftp://data.pdbj.org/pub/pdb/validation_reports/t1/8t1j | HTTPS FTP |
-関連構造データ
関連構造データ | 40969MC 8t1kC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 160769.562 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Nos1, Bnos / 発現宿主: Escherichia coli (大腸菌) / 参照: UniProt: P29476, nitric-oxide synthase (NADPH) #2: 化合物 | ChemComp-ZN / | #3: 化合物 | #4: 化合物 | #5: 化合物 | 研究の焦点であるリガンドがあるか | Y | |
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-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: Native CaM-bound nNOS homodimer / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) |
由来(組換発現) | 生物種: Escherichia coli (大腸菌) |
緩衝液 | pH: 7.5 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
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: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1000 nm |
撮影 | 電子線照射量: 56 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3次元再構成 | 解像度: 2.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 138304 / 対称性のタイプ: POINT |