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データを開く
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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | CryoEM structure of the Protein Phasphatase 2A (Aalpha-B56gamma-Calpha) holoenzyme complex | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | PP2A / Phosphatase / Complex / Holoenzyme / Heterotrimer / HYDROLASE | |||||||||
| 機能・相同性 | 機能・相同性情報meiotic spindle elongation / PP2A-mediated dephosphorylation of key metabolic factors / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / peptidyl-threonine dephosphorylation / regulation of meiotic cell cycle process involved in oocyte maturation / mitotic sister chromatid separation / MASTL Facilitates Mitotic Progression / protein phosphatase type 2A complex / meiotic sister chromatid cohesion, centromeric ...meiotic spindle elongation / PP2A-mediated dephosphorylation of key metabolic factors / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / peptidyl-threonine dephosphorylation / regulation of meiotic cell cycle process involved in oocyte maturation / mitotic sister chromatid separation / MASTL Facilitates Mitotic Progression / protein phosphatase type 2A complex / meiotic sister chromatid cohesion, centromeric / INTAC complex / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity / FAR/SIN/STRIPAK complex / female meiotic nuclear division / Regulation of glycolysis by fructose 2,6-bisphosphate metabolism / meiotic sister chromatid cohesion / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / protein phosphatase regulator activity / protein antigen binding / GABA receptor binding / APC truncation mutants have impaired AXIN binding / AXIN missense mutants destabilize the destruction complex / Truncations of AMER1 destabilize the destruction complex / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / ERKs are inactivated / Initiation of Nuclear Envelope (NE) Reformation / Beta-catenin phosphorylation cascade / Signaling by GSK3beta mutants / CTNNB1 S33 mutants aren't phosphorylated / CTNNB1 S37 mutants aren't phosphorylated / CTNNB1 S45 mutants aren't phosphorylated / CTNNB1 T41 mutants aren't phosphorylated / Co-stimulation by CD28 / RNA polymerase II transcription initiation surveillance / regulation of growth / Disassembly of the destruction complex and recruitment of AXIN to the membrane / protein dephosphorylation / negative regulation of epithelial to mesenchymal transition / Co-inhibition by CTLA4 / Platelet sensitization by LDL / protein-serine/threonine phosphatase / ERK/MAPK targets / negative regulation of glycolytic process through fructose-6-phosphate / mesoderm development / vascular endothelial cell response to oscillatory fluid shear stress / protein serine/threonine phosphatase activity / positive regulation of NLRP3 inflammasome complex assembly / T cell homeostasis / regulation of cell differentiation / regulation of microtubule polymerization / regulation of G1/S transition of mitotic cell cycle / protein phosphatase activator activity / lateral plasma membrane / chromosome, centromeric region / intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / DARPP-32 events / negative regulation of hippo signaling / Cyclin A/B1/B2 associated events during G2/M transition / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / spindle assembly / phosphoprotein phosphatase activity / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / protein tyrosine phosphatase activity / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / AURKA Activation by TPX2 / Resolution of Sister Chromatid Cohesion / negative regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / meiotic cell cycle / DNA damage response, signal transduction by p53 class mediator / chromosome segregation / RAF activation / RHO GTPases Activate Formins / negative regulation of canonical Wnt signaling pathway / Spry regulation of FGF signaling / PKR-mediated signaling / response to lead ion / Degradation of beta-catenin by the destruction complex / tau protein binding / spindle pole / Cyclin D associated events in G1 / Negative regulation of MAPK pathway / Separation of Sister Chromatids / Regulation of TP53 Degradation / Regulation of PLK1 Activity at G2/M Transition / mitotic cell cycle / PI5P, PP2A and IER3 Regulate PI3K/AKT Signaling / microtubule cytoskeleton / protein-containing complex assembly / proteasome-mediated ubiquitin-dependent protein catabolic process / neuron projection / intracellular signal transduction / membrane raft / protein heterodimerization activity 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.4 Å | |||||||||
データ登録者 | Day A / Taylor D | |||||||||
| 資金援助 | 米国, 1件
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引用 | ジャーナル: Structure / 年: 2025タイトル: Regulatory mechanisms of PP2A complex assembly driven by physicochemical differences in A-subunit isoforms. 著者: Alexander Day / Wei Huang / Daniel Leonard / Caitlin M O'Connor / Goutham Narla / Derek J Taylor / ![]() 要旨: Protein phosphatase 2A (PP2A) is crucial for regulating cellular pathways, with its holoenzyme assembly affecting enzyme function and substrate selection. The PP2A holoenzyme comprises scaffold A-, ...Protein phosphatase 2A (PP2A) is crucial for regulating cellular pathways, with its holoenzyme assembly affecting enzyme function and substrate selection. The PP2A holoenzyme comprises scaffold A-, regulatory B-, and catalytic C-subunits, each with various isoforms. Here, we examine structural and biochemical characteristics of the A-subunit isoforms (Aα and Aβ) and identify different biophysical properties that may promote distinct PP2A functions. Our molecular dynamics simulations and cryo-EM analyses define structural differences in the isoforms that reside primarily at the N-terminus of the A-subunit where it interfaces with regulatory B-subunits. Kinetic analyses show Aβ has a lower binding affinity in complexes with B56 subunits and exhibits unique aggregative properties as a monomeric protein. These findings suggest that the different physicochemical properties between A-subunit isoforms are key to PP2A holoenzyme assembly and function. We predict that the Aβ serves as a reservoir, ensuring that serine-threonine phosphatase activity is maintained during high regulatory demand. | |||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
| マップデータ | emd_48300.map.gz | 32.2 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-48300-v30.xml emd-48300.xml | 22.7 KB 22.7 KB | 表示 表示 | EMDBヘッダ |
| FSC (解像度算出) | emd_48300_fsc.xml | 8.5 KB | 表示 | FSCデータファイル |
| 画像 | emd_48300.png | 90.5 KB | ||
| Filedesc metadata | emd-48300.cif.gz | 7.1 KB | ||
| その他 | emd_48300_half_map_1.map.gz emd_48300_half_map_2.map.gz | 59.4 MB 59.4 MB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-48300 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-48300 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9mipMC ![]() 9mf5C M: このマップから作成された原子モデル 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 F&H 検索 |
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リンク
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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| 「今月の分子」の関連する項目 |
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マップ
| ファイル | ダウンロード / ファイル: emd_48300.map.gz / 形式: CCP4 / 大きさ: 64 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||
| ボクセルのサイズ | X=Y=Z: 1.056 Å | ||||||||||||||||||||||||||||||||||||
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
| ファイル | emd_48300_half_map_1.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
-ハーフマップ: #1
| ファイル | emd_48300_half_map_2.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
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試料の構成要素
-全体 : Heterotrimer complex of the PP2A Aalpha-B56gamma-Calpha holoenzyme
| 全体 | 名称: Heterotrimer complex of the PP2A Aalpha-B56gamma-Calpha holoenzyme |
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| 要素 |
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-超分子 #1: Heterotrimer complex of the PP2A Aalpha-B56gamma-Calpha holoenzyme
| 超分子 | 名称: Heterotrimer complex of the PP2A Aalpha-B56gamma-Calpha holoenzyme タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#3 |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 156 KDa |
-分子 #1: Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit...
| 分子 | 名称: Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform タイプ: protein_or_peptide / ID: 1 / コピー数: 1 / 光学異性体: LEVO |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 65.378344 KDa |
| 組換発現 | 生物種: ![]() |
| 配列 | 文字列: MAAADGDDSL YPIAVLIDEL RNEDVQLRLN SIKKLSTIAL ALGVERTRSE LLPFLTDTIY DEDEVLLALA EQLGTFTTLV GGPEYVHCL LPPLESLATV EETVVRDKAV ESLRAISHEH SPSDLEAHFV PLVKRLAGGD WFTSRTSACG LFSVCYPRVS S AVKAELRQ ...文字列: MAAADGDDSL YPIAVLIDEL RNEDVQLRLN SIKKLSTIAL ALGVERTRSE LLPFLTDTIY DEDEVLLALA EQLGTFTTLV GGPEYVHCL LPPLESLATV EETVVRDKAV ESLRAISHEH SPSDLEAHFV PLVKRLAGGD WFTSRTSACG LFSVCYPRVS S AVKAELRQ YFRNLCSDDT PMVRRAAASK LGEFAKVLEL DNVKSEIIPM FSNLASDEQD SVRLLAVEAC VNIAQLLPQE DL EALVMPT LRQAAEDKSW RVRYMVADKF TELQKAVGPE ITKTDLVPAF QNLMKDCEAE VRAAASHKVK EFCENLSADC REN VIMSQI LPCIKELVSD ANQHVKSALA SVIMGLSPIL GKDNTIEHLL PLFLAQLKDE CPEVRLNIIS NLDCVNEVIG IRQL SQSLL PAIVELAEDA KWRVRLAIIE YMPLLAGQLG VEFFDEKLNS LCMAWLVDHV YAIREAATSN LKKLVEKFGK EWAHA TIIP KVLAMSGDPN YLHRMTTLFC INVLSEVCGQ DITTKHMLPT VLRMAGDPVA NVRFNVAKSL QKIGPILDNS TLQSEV KPI LEKLTQDQDV DVKYFAQEAL TVLSLA UniProtKB: Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform |
-分子 #2: Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit...
| 分子 | 名称: Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform タイプ: protein_or_peptide / ID: 2 / コピー数: 1 / 光学異性体: LEVO |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 61.144645 KDa |
| 組換発現 | 生物種: ![]() |
| 配列 | 文字列: MLTCNKAGSR MVVDAANSNG PFQPVVLLHI RDVPPADQEK LFIQKLRQCC VLFDFVSDPL SDLKWKEVKR AALSEMVEYI THNRNVITE PIYPEVVHMF AVNMFRTLPP SSNPTGAEFD PEEDEPTLEA AWPHLQLVYE FFLRFLESPD FQPNIAKKYI D QKFVLQLL ...文字列: MLTCNKAGSR MVVDAANSNG PFQPVVLLHI RDVPPADQEK LFIQKLRQCC VLFDFVSDPL SDLKWKEVKR AALSEMVEYI THNRNVITE PIYPEVVHMF AVNMFRTLPP SSNPTGAEFD PEEDEPTLEA AWPHLQLVYE FFLRFLESPD FQPNIAKKYI D QKFVLQLL ELFDSEDPRE RDFLKTTLHR IYGKFLGLRA YIRKQINNIF YRFIYETEHH NGIAELLEIL GSIINGFALP LK EEHKIFL LKVLLPLHKV KSLSVYHPQL AYCVVQFLEK DSTLTEPVVM ALLKYWPKTH SPKEVMFLNE LEEILDVIEP SEF VKIMEP LFRQLAKCVS SPHFQVAERA LYYWNNEYIM SLISDNAAKI LPIMFPSLYR NSKTHWNKTI HGLIYNALKL FMEM NQKLF DDCTQQFKAE KLKEKLKMKE REEAWVKIEN LAKANPQYTV YSQASTMSIP VAMETDGPLF EDVQMLRKTV KDEAH QAQK DPKKDRPLAR RKSELPQDPH TKKALEAHCR ADELASQDGR UniProtKB: Serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform |
-分子 #3: Serine/threonine-protein phosphatase 2A catalytic subunit alpha i...
| 分子 | 名称: Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform タイプ: protein_or_peptide / ID: 3 / コピー数: 1 / 光学異性体: LEVO / EC番号: protein-serine/threonine phosphatase |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 35.636152 KDa |
| 組換発現 | 生物種: ![]() |
| 配列 | 文字列: MDEKVFTKEL DQWIEQLNEC KQLSESQVKS LCEKAKEILT KESNVQEVRC PVTVCGDVHG QFHDLMELFR IGGKSPDTNY LFMGDYVDR GYYSVETVTL LVALKVRYRE RITILRGNHE SRQITQVYGF YDECLRKYGN ANVWKYFTDL FDYLPLTALV D GQIFCLHG ...文字列: MDEKVFTKEL DQWIEQLNEC KQLSESQVKS LCEKAKEILT KESNVQEVRC PVTVCGDVHG QFHDLMELFR IGGKSPDTNY LFMGDYVDR GYYSVETVTL LVALKVRYRE RITILRGNHE SRQITQVYGF YDECLRKYGN ANVWKYFTDL FDYLPLTALV D GQIFCLHG GLSPSIDTLD HIRALDRLQE VPHEGPMCDL LWSDPDDRGG WGISPRGAGY TFGQDISETF NHANGLTLVS RA HQLVMEG YNWCHDRNVV TIFSAPNYCY RCGNQAAIME LDDTLKYSFL QFDPAPRRGE PHVTRRTPDY FL UniProtKB: Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform |
-分子 #4: MANGANESE (II) ION
| 分子 | 名称: MANGANESE (II) ION / タイプ: ligand / ID: 4 / コピー数: 2 / 式: MN |
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| 分子量 | 理論値: 54.938 Da |
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 緩衝液 | pH: 7.4 構成要素:
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| 凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 278 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
| 顕微鏡 | TFS KRIOS |
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| 撮影 | フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 平均電子線量: 31.5943 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: SPOT SCAN / 撮影モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 3.0 µm / 最小 デフォーカス(公称値): 1.0 µm |
| 試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
| 実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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コントローラー
万見について




キーワード
Homo sapiens (ヒト)
データ登録者
米国, 1件
引用




















Z (Sec.)
Y (Row.)
X (Col.)






































解析
FIELD EMISSION GUN

