National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
P01 HL020948
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM135343
United States
Citation
Journal: Life Sci Alliance / Year: 2020 Title: Structure of human Dispatched-1 provides insights into Hedgehog ligand biogenesis. Authors: Hongwen Chen / Yang Liu / Xiaochun Li / Abstract: Hedgehog (HH) signaling is essential for metazoan development. The HH ligand is secreted into the extracellular space by a cell surface protein named Dispatched-1 (DISP1). Here, we report the cryo-EM ...Hedgehog (HH) signaling is essential for metazoan development. The HH ligand is secreted into the extracellular space by a cell surface protein named Dispatched-1 (DISP1). Here, we report the cryo-EM structure of human DISP1 protein. DISP1 contains 12 transmembrane helices (TMs) and two extracellular domains (ECDs). Its ECDs reveal an open state, in contrast to its structural homologues PTCH1 and NPC1, whose extracellular/luminal domains adopt a closed state. The low-resolution structure of the DISP1 complex with dual lipid-modified HH ligand reveals how the ECDs of DISP1 engage with HH ligand. Moreover, several cholesterol-like molecules are found in the TMs, implying a transport-like function of DISP1.
Resolution: 4.53 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 400432 / Num. of class averages: 2 / Symmetry type: POINT
Refinement
Resolution: 4.53→4.53 Å / Cor.coef. Fo:Fc: 0.736 / SU B: 72.333 / SU ML: 0.879 / ESU R: 0.39 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
Num. reflection
% reflection
Rwork
0.46296
-
-
obs
0.46296
216926
100 %
Solvent computation
Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK