𝔖 Bobbio Scriptorium
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Two olfactory marker proteins inXenopus laevis

✍ Scribed by R�ssler, Patricia; Mezler, Mario; Breer, Heinz

Book ID
101220580
Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
384 KB
Volume
395
Category
Article
ISSN
0021-9967

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✦ Synopsis

Mature olfactory receptor neurons of mammals are characterized by the expression of the highly conserved olfactory marker protein (OMP) encoded by single copy genes. In Xenopus laevis, two homologous genes encoding olfactory marker proteins have been identified that share a sequence identity with mammalian OMPs of about 50%. Sequence comparison revealed significant variability in the N-terminus and C-terminus regions; in contrast, two internal domains were highly conserved between amphibian and mammalian OMPs, suggesting some functional relevance. The two OMP subtypes were regionally expressed in the olfactory nasal epithelium of Xenopus. XOMP1 transcripts were more abundant in the lateral diverticulum and XOMP2 in the medial diverticulum. The lateral location of XOMP1 and medial location of XOMP2 correspond to the suggested locations of olfactory receptor neurons responsive to water-borne and air-borne odorants, respectively.

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