National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM102498
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM098672
United States
National Institutes of Health/Office of the Director
DP5OD023048
United States
Citation
Journal: Proc Natl Acad Sci U S A / Year: 2020 Title: Hedgehog pathway activation through nanobody-mediated conformational blockade of the Patched sterol conduit. Authors: Yunxiao Zhang / Wan-Jin Lu / David P Bulkley / Jiahao Liang / Arthur Ralko / Shuo Han / Kelsey J Roberts / Anping Li / Wonhwa Cho / Yifan Cheng / Aashish Manglik / Philip A Beachy / Abstract: Activation of the Hedgehog pathway may have therapeutic value for improved bone healing, taste receptor cell regeneration, and alleviation of colitis or other conditions. Systemic pathway activation, ...Activation of the Hedgehog pathway may have therapeutic value for improved bone healing, taste receptor cell regeneration, and alleviation of colitis or other conditions. Systemic pathway activation, however, may be detrimental, and agents amenable to tissue targeting for therapeutic application have been lacking. We have developed an agonist, a conformation-specific nanobody against the Hedgehog receptor Patched1 (PTCH1). This nanobody potently activates the Hedgehog pathway in vitro and in vivo by stabilizing an alternative conformation of a Patched1 "switch helix," as revealed by our cryogenic electron microscopy structure. Nanobody-binding likely traps Patched in one stage of its transport cycle, thus preventing substrate movement through the Patched1 sterol conduit. Unlike the native Hedgehog ligand, this nanobody does not require lipid modifications for its activity, facilitating mechanistic studies of Hedgehog pathway activation and the engineering of pathway activating agents for therapeutic use. Our conformation-selective nanobody approach may be generally applicable to the study of other PTCH1 homologs.
History
Deposition
Sep 18, 2020
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Header (metadata) release
Mar 17, 2021
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Map release
Mar 17, 2021
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Update
Nov 20, 2024
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Current status
Nov 20, 2024
Processing site: RCSB / Status: Released
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Structure visualization
Movie
Surface view with section colored by density value
EMPIAR-10328 (Title: Hedgehog receptor Patched (PTCH1) in complex with a conformation selective nanobody TI23 Data size: 75.2 Data #1: Particle stack of Hedgehog receptor PTCH1 in complex with nanobody TI23 for final reconstruction [picked particles - multiframe - processed])
Number selected: 3621265 Details: Particles were picked first using a Gaussian blob as the template and then were re-picked using the 2D classes generated from the first round.
Startup model
Type of model: OTHER
Final reconstruction
Number classes used: 1 / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cisTEM (ver. 1) / Number images used: 307652
Initial angle assignment
Type: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2)
Final angle assignment
Type: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 2)
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