6rmg

From Proteopedia

Structure of PTCH1 bound to a modified Hedgehog ligand ShhN-C24II

6rmg, resolution 3.40Å

Structural highlights

6rmg is a 2 chain structure with sequence from Eimeria acervulina and Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 3.4Å
Ligands:
Experimental data:	Check to display Experimental Data
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

PTC1_HUMAN Semilobar holoprosencephaly;Monosomy 9q22.3;Alobar holoprosencephaly;Microform holoprosencephaly;Septopreoptic holoprosencephaly;Gorlin syndrome;Lobar holoprosencephaly;Midline interhemispheric variant of holoprosencephaly. The disease may be caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry.

Function

U6GSR1_EIMAC PTC1_HUMAN Acts as a receptor for sonic hedgehog (SHH), indian hedgehog (IHH) and desert hedgehog (DHH). Associates with the smoothened protein (SMO) to transduce the hedgehog's proteins signal. Seems to have a tumor suppressor function, as inactivation of this protein is probably a necessary, if not sufficient step for tumorigenesis.^[1]

Publication Abstract from PubMed

Hedgehog signaling is central in embryonic development and tissue regeneration. Disruption of the pathway is linked to genetic diseases and cancer. Binding of the secreted ligand, Sonic hedgehog (ShhN) to its receptor Patched (PTCH1) activates the signaling pathway. Here, we describe a 3.4-A cryo-EM structure of the human PTCH1 bound to ShhNC24II, a modified hedgehog ligand mimicking its palmitoylated form. The membrane-embedded part of PTCH1 is surrounded by 10 sterol molecules at the inner and outer lipid bilayer portion of the protein. The annular sterols interact at multiple sites with both the sterol-sensing domain (SSD) and the SSD-like domain (SSDL), which are located on opposite sides of PTCH1. The structure reveals a possible route for sterol translocation across the lipid bilayer by PTCH1 and homologous transporters.

Structural basis of sterol recognition by human hedgehog receptor PTCH1.,Qi C, Di Minin G, Vercellino I, Wutz A, Korkhov VM Sci Adv. 2019 Sep 18;5(9):eaaw6490. doi: 10.1126/sciadv.aaw6490. eCollection 2019, Sep. PMID:31555730^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Ma G, Yu J, Xiao Y, Chan D, Gao B, Hu J, He Y, Guo S, Zhou J, Zhang L, Gao L, Zhang W, Kang Y, Cheah KS, Feng G, Guo X, Wang Y, Zhou CZ, He L. Indian hedgehog mutations causing brachydactyly type A1 impair Hedgehog signal transduction at multiple levels. Cell Res. 2011 Sep;21(9):1343-57. doi: 10.1038/cr.2011.76. Epub 2011 May 3. PMID:21537345 doi:http://dx.doi.org/10.1038/cr.2011.76
↑ Qi C, Di Minin G, Vercellino I, Wutz A, Korkhov VM. Structural basis of sterol recognition by human hedgehog receptor PTCH1. Sci Adv. 2019 Sep 18;5(9):eaaw6490. doi: 10.1126/sciadv.aaw6490. eCollection 2019, Sep. PMID:31555730 doi:http://dx.doi.org/10.1126/sciadv.aaw6490