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基本情報
登録情報 | データベース: PDB / ID: 8t1k | ||||||
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タイトル | DSBU crosslinked nNOS-CaM oxygenase homodimer | ||||||
![]() | Nitric oxide synthase 1 | ||||||
![]() | CYTOSOLIC PROTEIN / Complex | ||||||
機能・相同性 | ![]() negative regulation of hepatic stellate cell contraction / Nitric oxide stimulates guanylate cyclase / positive regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of iron ion transmembrane transport / response to vitamin B3 / postsynaptic specialization, intracellular component / ROS and RNS production in phagocytes / azurophil granule / synaptic signaling by nitric oxide / Ion homeostasis ...negative regulation of hepatic stellate cell contraction / Nitric oxide stimulates guanylate cyclase / positive regulation of adenylate cyclase-activating adrenergic receptor signaling pathway / negative regulation of iron ion transmembrane transport / response to vitamin B3 / postsynaptic specialization, intracellular component / ROS and RNS production in phagocytes / azurophil granule / synaptic signaling by nitric oxide / Ion homeostasis / negative regulation of vasoconstriction / response to nitric oxide / negative regulation of cytosolic calcium ion concentration / positive regulation of adenylate cyclase-activating G protein-coupled receptor signaling pathway / response to vitamin E / positive regulation of sodium ion transmembrane transport / peptidyl-cysteine S-nitrosylase activity / cadmium ion binding / negative regulation of calcium ion transport / positive regulation of the force of heart contraction / negative regulation of potassium ion transport / regulation of postsynaptic membrane potential / nitric oxide mediated signal transduction / nitric-oxide synthase (NADPH) / sodium channel regulator activity / negative regulation of serotonin uptake / regulation of neurogenesis / nitric-oxide synthase activity / multicellular organismal response to stress / xenobiotic catabolic process / postsynaptic density, intracellular component / L-arginine catabolic process / striated muscle contraction / NADPH binding / behavioral response to cocaine / regulation of sodium ion transport / nitric oxide-cGMP-mediated signaling / negative regulation of blood pressure / response to hormone / nitric oxide metabolic process / cellular response to epinephrine stimulus / photoreceptor inner segment / nitric oxide biosynthetic process / T-tubule / sarcoplasmic reticulum membrane / calyx of Held / secretory granule / sarcoplasmic reticulum / positive regulation of long-term synaptic potentiation / response to activity / cell periphery / response to nicotine / phosphoprotein binding / response to nutrient levels / establishment of localization in cell / establishment of protein localization / female pregnancy / negative regulation of insulin secretion / cellular response to mechanical stimulus / sarcolemma / response to peptide hormone / caveola / cellular response to growth factor stimulus / potassium ion transport / response to lead ion / response to estrogen / vasodilation / Z disc / calcium-dependent protein binding / calcium ion transport / FMN binding / flavin adenine dinucleotide binding / NADP binding / positive regulation of neuron apoptotic process / ATPase binding / response to heat / scaffold protein binding / response to ethanol / response to lipopolysaccharide / nuclear membrane / dendritic spine / mitochondrial outer membrane / negative regulation of neuron apoptotic process / transmembrane transporter binding / RNA polymerase II-specific DNA-binding transcription factor binding / calmodulin binding / cytoskeleton / response to hypoxia / postsynaptic density / membrane raft / negative regulation of cell population proliferation / heme binding / synapse / dendrite / negative regulation of apoptotic process / positive regulation of DNA-templated transcription / perinuclear region of cytoplasm / glutamatergic synapse / enzyme binding / positive regulation of transcription by RNA polymerase II 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
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: 3.14 Å | ||||||
![]() | Lee, K. / Pospiech, T.H. / Southworth, D. | ||||||
資金援助 | ![]()
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![]() | ![]() 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. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 199.8 KB | 表示 | ![]() |
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PDB形式 | ![]() | 130.9 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.4 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.4 MB | 表示 | |
XML形式データ | ![]() | 37.3 KB | 表示 | |
CIF形式データ | ![]() | 52.4 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 40970MC ![]() 8t1jC 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 ( |
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類似構造データ | 類似検索 - 機能・相同性 ![]() |
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リンク
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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) ![]() ![]() ![]() ![]() #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 |
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試料調製
構成要素 | 名称: DSBU crosslinked 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: ![]() ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
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 |
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電子顕微鏡撮影
顕微鏡 | モデル: TFS GLACIOS |
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電子銃 | 電子線源: ![]() |
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: 62 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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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: 3.14 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 294924 / 対称性のタイプ: POINT |
精密化 | 最高解像度: 3.14 Å |