6RTW

Crystal structure of the Patched-1 (PTCH1) ectodomain in complex with nanobody NB64 and cholesterol-hemisuccinate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 6RVD


Literature

The morphogen Sonic hedgehog inhibits its receptor Patched by a pincer grasp mechanism.

Rudolf, A.F.Kinnebrew, M.Kowatsch, C.Ansell, T.B.El Omari, K.Bishop, B.Pardon, E.Schwab, R.A.Malinauskas, T.Qian, M.Duman, R.Covey, D.F.Steyaert, J.Wagner, A.Sansom, M.S.P.Rohatgi, R.Siebold, C.

(2019) Nat Chem Biol 15: 975-982

  • DOI: https://doi.org/10.1038/s41589-019-0370-y
  • Primary Citation of Related Structures:  
    6RTW, 6RTX, 6RTY, 6RVC, 6RVD

  • PubMed Abstract: 

    Hedgehog (HH) ligands, classical morphogens that pattern embryonic tissues in all animals, are covalently coupled to two lipids-a palmitoyl group at the N terminus and a cholesteroyl group at the C terminus. While the palmitoyl group binds and inactivates Patched 1 (PTCH1), the main receptor for HH ligands, the function of the cholesterol modification has remained mysterious. Using structural and biochemical studies, along with reassessment of previous cryo-electron microscopy structures, we find that the C-terminal cholesterol attached to Sonic hedgehog (Shh) binds the first extracellular domain of PTCH1 and promotes its inactivation, thus triggering HH signaling. Molecular dynamics simulations show that this interaction leads to the closure of a tunnel through PTCH1 that serves as the putative conduit for sterol transport. Thus, Shh inactivates PTCH1 by grasping its extracellular domain with two lipidic pincers, the N-terminal palmitate and the C-terminal cholesterol, which are both inserted into the PTCH1 protein core.


  • Organizational Affiliation

    Division of Structural Biology, Wellcome Centre for Human Genetics, University of Oxford, Oxford, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein patched homolog 1297Homo sapiensMutation(s): 0 
Gene Names: PTCH1PTCH
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q13635 (Homo sapiens)
Explore Q13635 
Go to UniProtKB:  Q13635
PHAROS:  Q13635
GTEx:  ENSG00000185920 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13635
Glycosylation
Glycosylation Sites: 3Go to GlyGen: Q13635-1
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Llama-derived nanobody NB64130Lama glamaMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.26α = 90
b = 65.72β = 90
c = 151.36γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Cancer Research UKUnited KingdomC20724/A14414
Cancer Research UKUnited KingdomC20724/A26752
European Research CouncilUnited Kingdom647278

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-02
    Type: Initial release
  • Version 1.1: 2019-10-09
    Changes: Data collection, Database references
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description, Structure summary