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基本情報
登録情報 | データベース: PDB / ID: 8ony | ||||||
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タイトル | Human Methionine Aminopeptidase 2 at the 80S ribosome | ||||||
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![]() | METAL BINDING PROTEIN / Ribosome Associated Factor / Protease / Tunnel exit / Protein Maturation / Proteostasis / NME / p67 / MAP / MetAP / MAP2 / MetAP2 / ES27L / PTE | ||||||
機能・相同性 | ![]() N-terminal protein amino acid modification / peptidyl-methionine modification / methionyl aminopeptidase / initiator methionyl aminopeptidase activity / metalloexopeptidase activity / eukaryotic 80S initiation complex / axial mesoderm development / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / regulation of translation involved in cellular response to UV / 90S preribosome assembly ...N-terminal protein amino acid modification / peptidyl-methionine modification / methionyl aminopeptidase / initiator methionyl aminopeptidase activity / metalloexopeptidase activity / eukaryotic 80S initiation complex / axial mesoderm development / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / regulation of translation involved in cellular response to UV / 90S preribosome assembly / positive regulation of DNA damage response, signal transduction by p53 class mediator / TORC2 complex binding / middle ear morphogenesis / metalloaminopeptidase activity / Peptide chain elongation / Selenocysteine synthesis / Formation of a pool of free 40S subunits / Eukaryotic Translation Termination / Response of EIF2AK4 (GCN2) to amino acid deficiency / SRP-dependent cotranslational protein targeting to membrane / Viral mRNA Translation / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / GTP hydrolysis and joining of the 60S ribosomal subunit / L13a-mediated translational silencing of Ceruloplasmin expression / aminopeptidase activity / Major pathway of rRNA processing in the nucleolus and cytosol / protein-RNA complex assembly / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / cytosolic ribosome / ossification / DNA damage response, signal transduction by p53 class mediator / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / positive regulation of translation / skeletal system development / sensory perception of sound / cellular response to gamma radiation / protein processing / mRNA 5'-UTR binding / Regulation of expression of SLITs and ROBOs / rRNA processing / cellular response to UV / Inactivation, recovery and regulation of the phototransduction cascade / regulation of translation / cytosolic large ribosomal subunit / cytoplasmic translation / postsynaptic density / rRNA binding / structural constituent of ribosome / cadherin binding / translation / ribonucleoprotein complex / focal adhesion / mRNA binding / synapse / nucleolus / RNA binding / extracellular exosome / nucleoplasm / metal ion binding / nucleus / membrane / plasma membrane / cytosol / cytoplasm 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: 2.92 Å | ||||||
![]() | Klein, M.A. / Wild, K. / Kisonaite, M. / Sinning, I. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Methionine aminopeptidase 2 and its autoproteolysis product have different binding sites on the ribosome. 著者: Marius A Klein / Klemens Wild / Miglė Kišonaitė / Irmgard Sinning / ![]() 要旨: Excision of the initiator methionine is among the first co-translational processes that occur at the ribosome. While this crucial step in protein maturation is executed by two types of methionine ...Excision of the initiator methionine is among the first co-translational processes that occur at the ribosome. While this crucial step in protein maturation is executed by two types of methionine aminopeptidases in eukaryotes (MAP1 and MAP2), additional roles in disease and translational regulation have drawn more attention to MAP2. Here, we report several cryo-EM structures of human and fungal MAP2 at the 80S ribosome. Irrespective of nascent chains, MAP2 can occupy the tunnel exit. On nascent chain displaying ribosomes, the MAP2-80S interaction is highly dynamic and the MAP2-specific N-terminal extension engages in stabilizing interactions with the long rRNA expansion segment ES27L. Loss of this extension by autoproteolytic cleavage impedes interactions at the tunnel, while promoting MAP2 to enter the ribosomal A-site, where it engages with crucial functional centers of translation. These findings reveal that proteolytic remodeling of MAP2 severely affects ribosome binding, and set the stage for targeted functional studies. | ||||||
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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 | ![]() | 381.3 KB | 表示 | ![]() |
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アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
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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
-RNA鎖 , 2種, 2分子 58
#1: RNA鎖 | 分子量: 1640222.125 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() 参照: GenBank: NR_003287 |
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#7: RNA鎖 | 分子量: 50449.812 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
-60S ribosomal protein ... , 5種, 5分子 LkLYLhLXLR
#2: タンパク質 | 分子量: 8238.948 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
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#3: タンパク質 | 分子量: 17303.363 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#4: タンパク質 | 分子量: 14593.624 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#5: タンパク質 | 分子量: 17740.193 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
#6: タンパク質 | 分子量: 23535.281 Da / 分子数: 1 / 由来タイプ: 天然 / 由来: (天然) ![]() |
-タンパク質 / 非ポリマー , 2種, 3分子 A

#8: タンパク質 | 分子量: 52971.523 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() |
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#9: 化合物 |
-詳細
研究の焦点であるリガンドがあるか | N |
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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: MAP2-80S ribosome complex / タイプ: RIBOSOME / Entity ID: #1-#8 / 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: 7.4 |
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
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: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2100 nm / 最小 デフォーカス(公称値): 1100 nm |
撮影 | 電子線照射量: 42 e/Å2 フィルム・検出器のモデル: GATAN K2 QUANTUM (4k x 4k) |
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解析
EMソフトウェア | 名称: PHENIX / バージョン: 1.19_4092: / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.92 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 215768 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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