- EMDB-33528: Cryo-EM structure of TOC-TIC supercomplex from Chlamydomonas rein... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-33528
タイトル
Cryo-EM structure of TOC-TIC supercomplex from Chlamydomonas reinhardtii
マップデータ
試料
複合体: a membrane protein complex
タンパク質・ペプチド: x 14種
リガンド: x 6種
機能・相同性
機能・相同性情報
protein import into chloroplast stroma / protein targeting to chloroplast / chloroplast inner membrane / chloroplast outer membrane / chloroplast membrane / chloroplast organization / axoneme assembly / motile cilium / spermatid development / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 ...protein import into chloroplast stroma / protein targeting to chloroplast / chloroplast inner membrane / chloroplast outer membrane / chloroplast membrane / chloroplast organization / axoneme assembly / motile cilium / spermatid development / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / protein transport / membrane => GO:0016020 / hydrolase activity / GTP binding / membrane / nucleus / metal ion binding / cytosol 類似検索 - 分子機能
CCB3/YggT / Chloroplast protein import component Tic20 / Protein TIC56 / YGGT family / Chloroplast import apparatus Tic20-like / GYF domain 2 / GYF domain 2 / GTPase GIMA/IAN/Toc / AIG1-type guanine nucleotide-binding (G) domain / AIG1 family ...CCB3/YggT / Chloroplast protein import component Tic20 / Protein TIC56 / YGGT family / Chloroplast import apparatus Tic20-like / GYF domain 2 / GYF domain 2 / GTPase GIMA/IAN/Toc / AIG1-type guanine nucleotide-binding (G) domain / AIG1 family / AIG1-type G domain profile. / Possible plasma membrane-binding motif in junctophilins, PIP-5-kinases and protein kinases. / MORN motif / MORN repeat / Surface antigen D15-like / Bacterial surface antigen (D15) / Omp85 superfamily domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
AIG1-type G domain-containing protein / Flagellar associated protein / Uncharacterized protein / YggT family protein / Translocase of chloroplast 34 homolog, chloroplastic / Bacterial surface antigen (D15) domain-containing protein / Protein TIC 20 / Uncharacterized protein / Uncharacterized protein / Uncharacterized protein ...AIG1-type G domain-containing protein / Flagellar associated protein / Uncharacterized protein / YggT family protein / Translocase of chloroplast 34 homolog, chloroplastic / Bacterial surface antigen (D15) domain-containing protein / Protein TIC 20 / Uncharacterized protein / Uncharacterized protein / Uncharacterized protein / Uncharacterized protein / Uncharacterized membrane protein ycf78 類似検索 - 構成要素
National Natural Science Foundation of China (NSFC)
31925024
中国
Chinese Academy of Sciences
XDB37020101
中国
Ministry of Science and Technology (MoST, China)
2017YFA0503702
中国
引用
ジャーナル: Nature / 年: 2023 タイトル: Architecture of chloroplast TOC-TIC translocon supercomplex. 著者: Hao Liu / Anjie Li / Jean-David Rochaix / Zhenfeng Liu / 要旨: Chloroplasts rely on the translocon complexes in the outer and inner envelope membranes (the TOC and TIC complexes, respectively) to import thousands of different nuclear-encoded proteins from the ...Chloroplasts rely on the translocon complexes in the outer and inner envelope membranes (the TOC and TIC complexes, respectively) to import thousands of different nuclear-encoded proteins from the cytosol. Although previous studies indicated that the TOC and TIC complexes may assemble into larger supercomplexes, the overall architectures of the TOC-TIC supercomplexes and the mechanism of preprotein translocation are unclear. Here we report the cryo-electron microscopy structure of the TOC-TIC supercomplex from Chlamydomonas reinhardtii. The major subunits of the TOC complex (Toc75, Toc90 and Toc34) and TIC complex (Tic214, Tic20, Tic100 and Tic56), three chloroplast translocon-associated proteins (Ctap3, Ctap4 and Ctap5) and three newly identified small inner-membrane proteins (Simp1-3) have been located in the supercomplex. As the largest protein, Tic214 traverses the inner membrane, the intermembrane space and the outer membrane, connecting the TOC complex with the TIC proteins. An inositol hexaphosphate molecule is located at the Tic214-Toc90 interface and stabilizes their assembly. Four lipid molecules are located within or above an inner-membrane funnel formed by Tic214, Tic20, Simp1 and Ctap5. Multiple potential pathways found in the TOC-TIC supercomplex may support translocation of different substrate preproteins into chloroplasts.
名称: Unknown peptide / タイプ: protein_or_peptide / ID: 14 詳細: Chain X belongs to an unidentified protein, which contains an alpha helix. The input sequence is a tentative one based on the model. The identity of this chain remains to be revealed in the future. コピー数: 1 / 光学異性体: LEVO