4N4W

Structure of the human smoothened receptor in complex with SANT-1.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for Smoothened receptor modulation and chemoresistance to anticancer drugs.

Wang, C.Wu, H.Evron, T.Vardy, E.Han, G.W.Huang, X.P.Hufeisen, S.J.Mangano, T.J.Urban, D.J.Katritch, V.Cherezov, V.Caron, M.G.Roth, B.L.Stevens, R.C.

(2014) Nat Commun 5: 4355-4355

  • DOI: 10.1038/ncomms5355
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Smoothened receptor (SMO) mediates signal transduction in the hedgehog pathway, which is implicated in normal development and carcinogenesis. SMO antagonists can suppress the growth of some tumours; however, mutations at SMO have been found to ab ...

    The Smoothened receptor (SMO) mediates signal transduction in the hedgehog pathway, which is implicated in normal development and carcinogenesis. SMO antagonists can suppress the growth of some tumours; however, mutations at SMO have been found to abolish their antitumour effects, a phenomenon known as chemoresistance. Here we report three crystal structures of human SMO bound to the antagonists SANT1 and Anta XV, and the agonist, SAG1.5, at 2.6-2.8 Å resolution. The long and narrow cavity in the transmembrane domain of SMO harbours multiple ligand binding sites, where SANT1 binds at a deeper site as compared with other ligands. Distinct interactions at D473(6.54f) elucidated the structural basis for the differential effects of chemoresistance mutations on SMO antagonists. The agonist SAG1.5 induces a conformational rearrangement of the binding pocket residues, which could contribute to SMO activation. Collectively, these studies reveal the structural basis for the modulation of SMO by small molecules.


    Organizational Affiliation

    Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b(562),Smoothened homolog
A
475Homo sapiensShigella flexneri serotype 5b (strain 8401)
This entity is chimeric
Mutation(s): 3 
Gene Names: SMO (SMOH), cybC
Find proteins for Q99835 (Homo sapiens)
Go to Gene View: SMO
Go to UniProtKB:  Q99835
Find proteins for Q0SXH8 (Shigella flexneri serotype 5b (strain 8401))
Go to UniProtKB:  Q0SXH8
Small Molecules
Ligands 8 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OLC
Query on OLC

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A
(2R)-2,3-dihydroxypropyl (9Z)-octadec-9-enoate
1-Oleoyl-R-glycerol
C21 H40 O4
RZRNAYUHWVFMIP-GDCKJWNLSA-N
 Ligand Interaction
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SNT
Query on SNT

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A
(E)-N-(4-benzylpiperazin-1-yl)-1-(3,5-dimethyl-1-phenyl-1H-pyrazol-4-yl)methanimine
SANT-1
C23 H27 N5
FOORCIAZMIWALX-JJIBRWJFSA-N
 Ligand Interaction
MAN
Query on MAN

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A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BMA
Query on BMA

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A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
PG4
Query on PG4

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A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SNTIC50: 4.7 - 25 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.204 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 84.640α = 90.00
b = 110.880β = 90.00
c = 145.210γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
Blu-Icedata collection
PHASERphasing
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-22
    Type: Initial release
  • Version 1.1: 2014-07-30
    Type: Database references
  • Version 1.2: 2017-06-07
    Type: Database references, Structure summary
  • Version 1.3: 2017-11-15
    Type: Refinement description