Simulation report

Technical information

General information

Name: Human smoothened receptor in complex with sag

PDB id: 4QIN

Activation state: Inactive

Submitted by: Ainoleena Turku, Karolinska Institutet

System setup

Solvent type: TIP3P

Membrane type: Homogeneous

Membrane composition: POPC

Ionic composition: Sodium ion (30 mM), Chloride (30 mM)

Number of molecules:

Water: 9296

POPC: 151

Sodium ion: 5

Chloride: 5

SAG 1.5: 1

Smoothened homolog: 1

Total number of atoms: 67784

Simulation details

Software and version: Gromacs, 2016.5

Forcefield and version: CHARMM, 36m

Time step : 2.0 fs

Delta : 0.2 ns

Replicates: 2

Accumulated simulation time: 0.8078000000000001 µs

Additonal parameters: Available at "Simulation protocol & starting files"


Kozielewicz P, Turku A, Bowin C-F, Petersen J, Valnohova J, Consuelo Alonso Cañizal M, Ono Y, Inoue A, Hoffmann C, Schulte G. 2020. Structural insight into small molecule action on Frizzleds. Nature communications 1 (11). doi: 10.1038/s41467-019-14149-3. (

Simulation components


Orthosteric ligand(s)

Sag 1.5

(1 molecule)


PDB id: 4QIN
Smoothened homolog

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No mutations found

Other molecules

Sodium ion

Specific State ID: 5016

(5 molecules)



Specific State ID: 5017

(5 molecules)



Specific State ID: 5018

(151 molecules)


Specific State ID: 5019

(9296 molecules)


SAG 1.5 (orthosteric lig.)

Specific State ID: 5149

(1 molecule)