A MammalianpatchedHomolog Is Expressed in Target Tissues ofsonic hedgehogand Maps to a Region Associated with Developmental Abnormalities

Heidi Hahn, Jeffrey Christiansen, Carol Wicking, Peter G. Zaphiropoulos, Abirami Chidambaram, Bernard Gerrard, Igor Vorechovsky, Allen E. Bale, Rune Toftgard, Michael Dean, Brandon Wainwright
1996 Journal of Biological Chemistry  
Drosophila patched is a segment polarity gene required for the correct patterning of larval segments and imaginal discs during fly development and has a close functional relationship with hedgehog. We have isolated a complete human PATCHED cDNA sequence, which encodes a putative protein of 1296 amino acids, and displays 39% identity and 60% similarity to the Drosophila PATCHED protein. Hydropathy analysis suggests that human PATCHED is an integral membrane protein with a pattern of hydrophobic
more » ... nd hydrophilic stretches nearly identical to that of Drosophila patched. In the developing mouse embryo, patched is initially detected within the ventral neural tube and later in the somites and limb buds. Expression in the limb buds is restricted to the posterior ectoderm surrounding the zone of polarizing activity. The results show that patched is expressed in target tissues of sonic hedgehog, a murine homolog of Drosophila hedgehog suggesting that patched/hedgehog interactions have been conserved during evolution. Human PATCHED maps to human chromosome 9q22.3, the candidate region for the nevoid basal cell carcinoma syndrome. Patched expression is compatible with the congenital defects observed in the nevoid basal cell carcinoma syndrome.
doi:10.1074/jbc.271.21.12125 pmid:8647801 fatcat:nu3rrcnlvfgztjfflfejr4cerq