+検索条件
-Structure paper
タイトル | Structure of a TRAPPII-Rab11 activation intermediate reveals GTPase substrate selection mechanisms. |
---|---|
ジャーナル・号・ページ | Sci Adv, Vol. 8, Issue 19, Page eabn7446, Year 2022 |
掲載日 | 2022年5月13日 |
著者 | Saket R Bagde / J Christopher Fromme / |
PubMed 要旨 | Rab1 and Rab11 are essential regulators of the eukaryotic secretory and endocytic recycling pathways. The transport protein particle (TRAPP) complexes activate these guanosine triphosphatases via ...Rab1 and Rab11 are essential regulators of the eukaryotic secretory and endocytic recycling pathways. The transport protein particle (TRAPP) complexes activate these guanosine triphosphatases via nucleotide exchange using a shared set of core subunits. The basal specificity of the TRAPP core is toward Rab1, yet the TRAPPII complex is specific for Rab11. A steric gating mechanism has been proposed to explain TRAPPII counterselection against Rab1. Here, we present cryo-electron microscopy structures of the 22-subunit TRAPPII complex from budding yeast, including a TRAPPII-Rab11 nucleotide exchange intermediate. The Trs130 subunit provides a "leg" that positions the active site distal to the membrane surface, and this leg is required for steric gating. The related TRAPPIII complex is unable to activate Rab11 because of a repulsive interaction, which TRAPPII surmounts using the Trs120 subunit as a "lid" to enclose the active site. TRAPPII also adopts an open conformation enabling Rab11 to access and exit from the active site chamber. |
リンク | Sci Adv / PubMed:35559680 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.4 - 9.2 Å |
構造データ | EMDB-26221: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (consensus map of symmetric dimer) EMDB-26223: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of closed monomer) EMDB-26224: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of dimer interface) EMDB-26225: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of central region of closed monomer) EMDB-26226: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of core and Ypt32) EMDB-26227: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Ypt32 and region around Ypt32) EMDB-26228: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Trs130 N-terminal region, Tca17, Trs33 and Bet3) EMDB-26229: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Trs130 middle region, Tca17, Trs33 and Bet3) EMDB-26230: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Trs120 N-terminal region and Trs20) EMDB-26231: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Trs120 middle region) EMDB-26232: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/closed state (focused refinement of Trs65 N-terminal region, Trs130 C-terminal region, Trs120 N-terminal region, Trs20, Trs31 and Bet3) EMDB-26233: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (consensus map of asymmetric dimer state A) EMDB-26234: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of open monomer) EMDB-26235: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of closed monomer in asymmetric dimer state A) EMDB-26236: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of dimer interface) EMDB-26237: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Tca17, Trs33 and Bet3 in the open monomer) EMDB-26238: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of core in the open monomer) EMDB-26239: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs120 N-terminal region and Trs20 in the open monomer) EMDB-26240: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs120 middle region in the open monomer) EMDB-26241: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of central region in the open monomer) EMDB-26242: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs130 middle region in the open monomer) EMDB-26243: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs65 N-terminal region in the open monomer) EMDB-26244: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs130 N-terminal region, Tca17, Trs33 and Bet3 in the open monomer) EMDB-26245: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of core and Ypt32 in the closed monomer) EMDB-26246: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs120 N-terminal region and Trs20 in the closed monomer) EMDB-26248: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs120 middle region in the closed monomer) EMDB-26249: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of central region of the closed monomer) EMDB-26250: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs130 middle region in the closed monomer) EMDB-26251: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs130 middle region, Tca17, Trs33 and Bet3 in the closed monomer) EMDB-26252: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs130 N-terminal region, Tca17, Trs33 and Bet3 in the closed monomer) EMDB-26253: Yeast TRAPPII-Rab11/Ypt32 complex in the closed/open state (focused refinement of Trs65 N-terminal region in the closed monomer) EMDB-26254, PDB-7u05: EMDB-26255, PDB-7u06: EMDB-26269: Yeast TRAPPII complex in the closed/open state (consensus map) EMDB-26270: Yeast TRAPPII complex in the closed/closed state (consensus map) EMDB-26271: Yeast TRAPPII complex in the partially open/open state (consensus map) EMDB-26272: Yeast TRAPPII complex in the closed/partially open (consensus map) |
化合物 | ChemComp-PLM: |
由来 |
|
キーワード | PROTEIN TRANSPORT / complex / GTPase / Guanosine Exchange Factor / GEF |