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Updated: Sep 26, 2026

Whole Mount Labeling of Cilia in the Main Olfactory System of Mice
Published on: December 27, 2014
Olfactory-specific cytochrome P-450. cDNA cloning of a novel neuroepithelial enzyme possibly involved in
1Department of Membrane Research, Weizmann Institute of Science, Rehovot, Israel.
Abstract:
We isolated cDNA clones for cytochrome P-450 genes expressed in the olfactory neuroepithelium by screening a corresponding rat cDNA library. Sequence analysis and RNA blot hybridization revealed a new cytochrome P-450, designated cytochrome P-450olf1, which is the first reported cytochrome P-450 mRNA uniquely expressed in the chemosensory organ. Cytochrome P-450olf1 shows intermediate level of sequence similarity (38-53% identity) to several liver cytochrome P-450 enzymes, suggesting that it belongs to the cytochrome P-450II family, but defines a new subfamily (cytochrome P-450IIG) within it. Cytochrome P-450II enzymes are known to process diverse organic compounds, including odorants. This, together with the specificity of cytochrome P-450olf1 to the sensory neuroepithelium, may indicate a role for this protein in olfactory reception.
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