- EMDB-54212: Ypt7 in complex with its GEF Mon1-Ccz1 -
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基本情報
登録情報
データベース: EMDB / ID: EMD-54212
タイトル
Ypt7 in complex with its GEF Mon1-Ccz1
マップデータ
試料
複合体: Complex of nucleotide free Ypt7 with its GEF Mon1-Ccz1
タンパク質・ペプチド: Rab small monomeric GTPase-like protein
タンパク質・ペプチド: Vacuolar fusion protein MON1
タンパク質・ペプチド: CCZ1/INTU/HSP4 first Longin domain-containing protein
キーワード
longin domain / GEF / nucleotide exchange / endosome / autophagosome / small GTPase / CYTOSOLIC PROTEIN
機能・相同性
機能・相同性情報
Mon1-Ccz1 complex / regulation of vacuole fusion, non-autophagic / protein targeting to vacuole / multivesicular body membrane / fungal-type vacuole membrane / vesicle-mediated transport / autophagy / late endosome / GTPase activity / GTP binding 類似検索 - 分子機能
Vacuolar fusion protein Ccz1 / Vacuolar fusion protein Mon1 / CCZ1/INTU/HSP4, first Longin domain / First Longin domain of INTU, CCZ1 and HPS4 / FUZ/MON1/HPS1, third Longin domain / FUZ/MON1/HPS1, second Longin domain / FUZ/MON1/HPS1, first Longin domain / First Longin domain of FUZ, MON1 and HPS1 / Second Longin domain of FUZ, MON1 and HPS1 / Third Longin domain of FUZ, MON1 and HPS1 ...Vacuolar fusion protein Ccz1 / Vacuolar fusion protein Mon1 / CCZ1/INTU/HSP4, first Longin domain / First Longin domain of INTU, CCZ1 and HPS4 / FUZ/MON1/HPS1, third Longin domain / FUZ/MON1/HPS1, second Longin domain / FUZ/MON1/HPS1, first Longin domain / First Longin domain of FUZ, MON1 and HPS1 / Second Longin domain of FUZ, MON1 and HPS1 / Third Longin domain of FUZ, MON1 and HPS1 / Small GTPase Rab domain profile. / Small GTPase Rho domain profile. / Small GTPase Ras domain profile. / Ran (Ras-related nuclear proteins) /TC4 subfamily of small GTPases / Rho (Ras homology) subfamily of Ras-like small GTPases / Ras subfamily of RAS small GTPases / Small GTPase / Ras family / Rab subfamily of small GTPases / Small GTP-binding protein domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
CCZ1/INTU/HSP4 first Longin domain-containing protein / Rab small monomeric GTPase-like protein / Vacuolar fusion protein MON1 類似検索 - 構成要素
ジャーナル: Sci Adv / 年: 2025 タイトル: Mechanistic adaptation of the metazoan RabGEFs Mon1-Ccz1 and Fuzzy-Inturned. 著者: Stephan Wilmes / Jesse Tönjes / Maik Drechsler / Anita Ruf / Jan-Hannes Schäfer / Anna Lürick / Dovile Januliene / Steven Apelt / Daniele Di Iorio / Seraphine V Wegner / Martin Loose / ...著者: Stephan Wilmes / Jesse Tönjes / Maik Drechsler / Anita Ruf / Jan-Hannes Schäfer / Anna Lürick / Dovile Januliene / Steven Apelt / Daniele Di Iorio / Seraphine V Wegner / Martin Loose / Arne Moeller / Achim Paululat / Daniel Kümmel / 要旨: Rab GTPases organize intracellular trafficking and provide identity to organelles. Their spatiotemporal activation by guanine nucleotide exchange factors (GEFs) is tightly controlled to ensure ...Rab GTPases organize intracellular trafficking and provide identity to organelles. Their spatiotemporal activation by guanine nucleotide exchange factors (GEFs) is tightly controlled to ensure fidelity. Our structural and functional comparison of the tri-longin domain RabGEFs Mon1-Ccz1 and Fuzzy-Inturned reveals the molecular basis for their target specificity. Both complexes rely on a conserved sequence motif of their substrate GTPases for the catalytic mechanism, while secondary interactions allow discrimination between targets. We also find that dimeric Mon1-Ccz1 from fungi and the metazoan homologs with the additional third subunit RMC1/Bulli bind membranes through electrostatic interactions via distinct interfaces. Protein-lipid interaction studies and functional characterization in flies reveal an essential function of RMC1/Bulli as mediator of GEF complex membrane recruitment. In the case of Fuzzy-Inturned, reconstitution experiments demonstrate that the BAR (Bin-Amphiphysin-Rvs) domain protein CiBAR1 can support membrane recruitment of the GEF. Collectively, our study demonstrates the molecular basis for the adaptation of TLD-RabGEFs to different cellular functions.