8xks

The cryo-EM structure of Orf2971-FtsHi motor complexThe cryo-EM structure of Orf2971-FtsHi motor complex

Structural highlights 8xks is a 11 chain structure with sequence from Chlamydomonas reinhardtii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.2Å Ligands: , , , , , , Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A2K3DLF7_CHLRE Publication Abstract from PubMed Thousands of nuclear-encoded proteins are transported into chloroplasts through the TOC-TIC translocon that spans the chloroplast envelope membranes. A motor complex pulls the translocated proteins out of the TOC-TIC complex into the chloroplast stroma by hydrolyzing ATP. The Orf2971-FtsHi complex has been suggested to serve as the ATP-hydrolyzing motor in Chlamydomonas reinhardtii, but little is known about its architecture and assembly. Here, we report the 3.2-A resolution structure of the Chlamydomonas Orf2971-FtsHi complex. The 20-subunit complex spans the chloroplast inner envelope, with two bulky modules protruding into the intermembrane space and stromal matrix. Six subunits form a hetero-hexamer that potentially provides the pulling force through ATP hydrolysis. The remaining subunits, including potential enzymes/chaperones, likely facilitate the complex assembly and regulate its proper function. Taken together, our results provide the structural foundation for a mechanistic understanding of chloroplast protein translocation. Architecture of the ATP-driven motor for protein import into chloroplasts.,Wang N, Xing J, Su X, Pan J, Chen H, Shi L, Si L, Yang W, Li M Mol Plant. 2024 Nov 4;17(11):1702-1718. doi: 10.1016/j.molp.2024.09.010. Epub , 2024 Sep 25. PMID:39327731 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

spinqualitylabelsall models 8xks, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image