Browse our Patched 2 Proteins (PTCH2)

Human Patched 2 (PTCH2) interaction partners

1. Combined heterozygous germline mutations in PTCH1 and PTCH2 were identified in a patient with embryonal rhabdomyosarcoma.

2. Frameshift mutation in the PTCH2 gene can cause nevoid basal cell carcinoma syndrome.

3. PTCH2 isoforms have distinct roles in Hedgehog signalling.

4. PTCH2 (2157G-->A), a novel missense mutation, underlies NBCCS, resulting in the loss of PTCH2 inhibitory function in the Shh signalling pathway.

5. A susceptibility locus on 1p32-1p34 for congenital macrostomia in a Chinese family and identification of a novel PTCH2 mutation are reported.

Mouse (Murine) Patched 2 (PTCH2) interaction partners

1. during Hedgehog signaling, ligand binding inhibits Patched by trapping it in an inactive conformation, a mechanism that explains the dramatically reduced activity of oncogenic Patched1 mutants.

2. These findings support a model in which Ptch1/2 mediate secretion of a Smo-inhibitory cholesterol precursor.

3. Ptch2(-/-) niche cells show hyperactive noncanonical HH signaling, resulting in reduced production of essential HSC regulators (Scf, Cxcl12, and Jag1) and depletion of osteoblasts.

4. Ptch2 is a functional Shh receptor that shares overlapping functions with Ptch1 in Smo regulation and limb development.

5. Ptch1(-/-);Ptch2(-/-) cells cannot further activate the Shh response, demonstrating that Ptch2 mediates the response to Shh in the absence of Ptch1.

6. Our studies indicate that concomitant loss of Ptch1 and Ptch2 activity inhibits epidermal lineage specification and differentiation.

7. PTCH2 is a direct transcriptional target that antagonizes hedgehog signaling in NIH/3T3 cells.

8. Single-strand conformation polymorphism analysis was used to map mouse Ptch2 to chromosome 4 between the microsatellite markers D4Mit20 and D4Mit334.

9. Functional compensation by Ptc1 might account for the lack of a strong mutant phenotype in Ptc2-deficient mice. Normal Ptc2 function is required for adult skin homeostasis.

Xenopus laevis Patched 2 (PTCH2) interaction partners

1. Zyxin binding to Ptc2 is due to the interaction of Zyxin 2nd LIM-domain (530-590 aa) with the under-membrane region of the cytoplasmic C-terminus of Ptc2 (1159-1412 aa).

Zebrafish Patched 2 (PTCH2) interaction partners

1. We have identified 18 recessive mutations affecting development of the zebrafish visual system and we have characterized a novel splice-acceptor site mutation in patched2 that results in enhanced Hh pathway activity and colobomas.

2. Results demonstrate a direct link between overproliferation and retinal dysplasia in the ptc2-/- juvenile retina and establish ectopic proliferation as the likely cellular underpinning of retinal dysplasia in juvenile ptc2-/- mutants.

3. The Hedgehog co-receptors patched1 and patched2 are expressed in regions of the perichondrium that will form bone before the onset of ossification.

4. The generation and characterization of the ptc1;ptc2 double mutant assigned novel and unexpected functions to the Hh signaling pathway.

5. Positional cloning of blowout identified a nonsense mutation in patched1, a negative regulator of the Hedgehog pathway, as the underlying cause of the blowout phenotype.