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基本情報
登録情報 | データベース: PDB / ID: 8ezj | ||||||
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タイトル | Cryo-EM structure of the S. cerevisiae Arf-like protein Arl1 bound to the Arf guanine nucleotide exchange factor Gea2 | ||||||
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![]() | LIPID TRANSPORT / small GTPase / guanine nucleotide exchange factor / membrane trafficking / lipid flippase / trans-Golgi network / protein transport | ||||||
機能・相同性 | ![]() Retrograde transport at the Trans-Golgi-Network / Golgi cis cisterna / secretory granule organization / trans-Golgi network membrane organization / VxPx cargo-targeting to cilium / trans-Golgi Network Vesicle Budding / COPI-dependent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / cytoplasm to vacuole targeting by the Cvt pathway / protein localization to Golgi apparatus ...Retrograde transport at the Trans-Golgi-Network / Golgi cis cisterna / secretory granule organization / trans-Golgi network membrane organization / VxPx cargo-targeting to cilium / trans-Golgi Network Vesicle Budding / COPI-dependent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / cytoplasm to vacuole targeting by the Cvt pathway / protein localization to Golgi apparatus / protein localization to phagophore assembly site / protein targeting to vacuole / intra-Golgi vesicle-mediated transport / regulation of ARF protein signal transduction / Golgi to plasma membrane protein transport / protein-containing complex localization / retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum / phagophore assembly site / cellular response to nitrogen starvation / endoplasmic reticulum to Golgi vesicle-mediated transport / vesicle-mediated transport / response to endoplasmic reticulum stress / guanyl-nucleotide exchange factor activity / macroautophagy / intracellular protein transport / trans-Golgi network / endocytosis / cellular response to heat / actin cytoskeleton organization / endosome membrane / Golgi membrane / GTPase activity / GTP binding / Golgi apparatus / 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: 3.3 Å | ||||||
![]() | Duan, H.D. / Li, H. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural insight into an Arl1-ArfGEF complex involved in Golgi recruitment of a GRIP-domain golgin. 著者: H Diessel Duan / Bhawik K Jain / Hua Li / Todd R Graham / Huilin Li / ![]() 要旨: Arl1 is an Arf-like (Arl) GTP-binding protein that interacts with the guanine nucleotide exchange factor Gea2 to recruit the golgin Imh1 to the Golgi. The Arl1-Gea2 complex also binds and activates ...Arl1 is an Arf-like (Arl) GTP-binding protein that interacts with the guanine nucleotide exchange factor Gea2 to recruit the golgin Imh1 to the Golgi. The Arl1-Gea2 complex also binds and activates the phosphatidylserine flippase Drs2 and these functions may be related, although the underlying molecular mechanism is unclear. Here we report high-resolution cryo-EM structures of the full-length Gea2 and the Arl1-Gea2 complex. Gea2 is a large protein with 1459 residues and is composed of six domains (DCB, HUS, SEC7, HDS1-3). We show that Gea2 assembles a stable dimer via an extensive interface involving hydrophobic and electrostatic interactions in the DCB and HUS region. Contrary to the previous report on a Gea2 homolog in which Arl1 binds to the dimerization surface of the DCB domain, implying a disrupted dimer upon Arl1 binding, we find that Arl1 binds to the outside surface of the Gea2 DCB domain, leaving the Gea2 dimer intact. The interaction between Arl1 and Gea2 involves the classic FWY aromatic residue triad as well as two Arl1-specific residues. We show that key mutations that disrupt the Arl1-Gea2 interaction abrogate Imh1 Golgi association. This work clarifies the Arl1-Gea2 interaction and improves our understanding of molecular events in the membrane trafficking. | ||||||
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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 | ![]() | 586.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 464.4 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 822.2 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 864.6 KB | 表示 | |
XML形式データ | ![]() | 77.2 KB | 表示 | |
CIF形式データ | ![]() | 118 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 | ![]() 28743MC ![]() 8ezqC 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: 168590.703 Da / 分子数: 2 / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: GEA2, YEL022W / 発現宿主: ![]() ![]() #2: タンパク質 | 分子量: 20460.168 Da / 分子数: 2 / Fragment: N-terminal 17 residues deleted / Mutation: Q72L / 由来タイプ: 組換発現 由来: (組換発現) ![]() ![]() 遺伝子: ARL1, ARF3, YBR164C, YBR1216 / 発現宿主: ![]() ![]() #3: 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: Gea2 homodimer in complex with two Arl1 monomers / タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 値: 0.379 MDa / 実験値: NO |
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): 1700 nm / 最小 デフォーカス(公称値): 1300 nm |
撮影 | 電子線照射量: 69 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k 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: 3.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 712548 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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