8jp7

Cryo-EM structure of the head region of full-length ERGIC-53 with MCFD2 (Substate B)

spinqualitylabelsall models 8jp7, resolution 3.51Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8jp7 is a 8 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Electron Microscopy, Resolution 3.51Å Ligands: CA, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed ERGIC-53 transports certain subsets of newly synthesized secretory proteins and membrane proteins from the endoplasmic reticulum to the Golgi apparatus. Despite numerous structural and functional studies since its identification, the overall architecture and mechanism of action of ERGIC-53 remain unclear. Here we present cryo-EM structures of full-length ERGIC-53 in complex with its functional partner MCFD2. These structures reveal that ERGIC-53 exists as a homotetramer, not a homohexamer as previously suggested, and comprises a four-leaf clover-like head and a long stalk composed of three sets of four-helix coiled-coil followed by a transmembrane domain. 3D variability analysis visualizes the flexible motion of the long stalk and local plasticity of the head region. Notably, MCFD2 is shown to possess a Zn(2+)-binding site in its N-terminal lid, which appears to modulate cargo binding. Altogether, distinct mechanisms of cargo capture and release by ERGIC- 53 via the stalk bending and metal binding are proposed. Structure of full-length ERGIC-53 in complex with MCFD2 for cargo transport.,Watanabe S, Kise Y, Yonezawa K, Inoue M, Shimizu N, Nureki O, Inaba K Nat Commun. 2024 Mar 16;15(1):2404. doi: 10.1038/s41467-024-46747-1. PMID:38493152 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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