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7E2I

Cryo-EM structure of hDisp1NNN-ShhN

Summary for 7E2I
Entry DOI10.2210/pdb7e2i/pdb
Related7E2G 7E2H
EMDB information30956 30957 30958
DescriptorSonic hedgehog protein, Protein dispatched homolog 1, ZINC ION, ... (5 entities in total)
Functional Keywordsmembrane protein, lipid transport
Biological sourceHomo sapiens (Human)
More
Total number of polymer chains2
Total formula weight225143.59
Authors
Li, W.,Wang, L.,Gong, X. (deposition date: 2021-02-05, release date: 2021-12-08, Last modification date: 2024-11-13)
Primary citationLi, W.,Wang, L.,Wierbowski, B.M.,Lu, M.,Dong, F.,Liu, W.,Li, S.,Wang, P.,Salic, A.,Gong, X.
Structural insights into proteolytic activation of the human Dispatched1 transporter for Hedgehog morphogen release.
Nat Commun, 12:6966-6966, 2021
Cited by
PubMed Abstract: The membrane protein Dispatched (Disp), which belongs to the RND family of small molecule transporters, is essential for Hedgehog (Hh) signaling, by catalyzing the extracellular release of palmitate- and cholesterol-modified Hh ligands from producing cells. Disp function requires Furin-mediated proteolytic cleavage of its extracellular domain, but how this activates Disp remains obscure. Here, we employ cryo-electron microscopy to determine atomic structures of human Disp1 (hDisp1), before and after cleavage, and in complex with lipid-modified Sonic hedgehog (Shh) ligand. These structures, together with biochemical data, reveal that proteolytic cleavage opens the extracellular domain of hDisp1, removing steric hindrance to Shh binding. Structure-guided functional experiments demonstrate the role of hDisp1-Shh interactions in ligand release. Our results clarify the mechanisms of hDisp1 activation and Shh morphogen release, and highlight how a unique proteolytic cleavage event enabled acquisition of a protein substrate by a member of a family of small molecule transporters.
PubMed: 34845226
DOI: 10.1038/s41467-021-27257-w
PDB entries with the same primary citation
Experimental method
ELECTRON MICROSCOPY (4.07 Å)
Structure validation

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