Reactome | Hh-Np binds GPC5

Hh-Np binds GPC5

Stable Identifier

R-HSA-5362427

Type

Reaction [binding]

Species

Homo sapiens

Compartment

plasma membrane

ReviewStatus

5/5

Locations in the PathwayBrowser

Expand all

General

SBML | | PDF

SVG | | PPTX | SBGN

Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout

The establishment of a signaling gradient of Hh-Np is modulated in part by the interaction of the ligand with heparin sulphate proteoglycans (HSPGs) in the extracellular matrix (ECM) of the secreting cell. Interactions with HSPGs can influence Hh oligomerization and also impact the lateral and long-range spread of Hh ligand (reviewed in Gallet, 2011; Briscoe and Therond, 2013). Interactions with HSPGs can stimulate or restrict Hh signaling depending on the context and the particular proteoglycans involved (see for instance Witt et al, 2013; Li et al, 2011; Capurro et al, 2005; Capurro et al, 2012; reviewed in Gallet, 2011).

In vertebrate cells, the GPI-anchored HSPG glypican 5 (GPC5) has been shown to stimulate Hh signaling by promoting the interaction between SHH ligand and the PTCH1 receptor (Li et al, 2011; Witt et al, 2013). SHH and PTCH1 binding depends on the GAG chains of GPC5, as versions lacking the GAG insertion sites are compromised for both ligand and receptor binding, and these proteins do not stimulate Hh signaling (Li et al, 2011). Amplification of GPC5 has been observed in 20% of rhabdomyosarcomas (Williamson et al, 2007), and aberrant activation of Hh signaling in these cells promotes cellular proliferation (Li et al, 2011).

Literature References

PubMed ID	Title	Journal	Year
18477453	Glypican-3 inhibits Hedgehog signaling during development by competing with patched for Hedgehog binding Xu, P, Filmus, J, Li, F, Capurro, MI, Jia, A, Shi, W	Dev. Cell	2008
17210683	Role for amplification and expression of glypican-5 in rhabdomyosarcoma Workman, P, Pritchard-Jones, K, Murai, K, Gordon, T, Selfe, J, Jones, P, Williamson, D, Lu, YJ, Shipley, J	Cancer Res.	2007
21339334	Glypican-5 stimulates rhabdomyosarcoma cell proliferation by activating Hedgehog signaling Filmus, J, Li, F, Capurro, M, Shi, W	J. Cell Biol.	2011
21257310	Hedgehog morphogen: from secretion to reception Gallet, A	Trends Cell Biol.	2011
22467855	LRP1 mediates Hedgehog-induced endocytosis of the GPC3-Hedgehog complex Filmus, J, Capurro, MI, Shi, W	J. Cell. Sci.	2012
23719536	The mechanisms of Hedgehog signalling and its roles in development and disease Thérond, PP, Briscoe, J	Nat. Rev. Mol. Cell Biol.	2013
23867465	Heparan sulfate proteoglycans containing a glypican 5 core and 2-O-sulfo-iduronic acid function as Sonic Hedgehog co-receptors to promote proliferation Segal, RA, Seeberger, PH, Noti, C, Witt, RM, Cohen, SM, Chan, JA, Pazyra-Murphy, MF, Hopwood, JJ, van Kuppevelt, TH, Fuller, M, Hecht, ML	J. Biol. Chem.	2013