Universität zu Köln

Kowatschew, Daniel and Korsching, Sigrun, I (2021). An Ancient Adenosine Receptor Gains Olfactory Function in Bony Vertebrates. Genome Biol. Evol., 13 (9). OXFORD: OXFORD UNIV PRESS. ISSN 1759-6653

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Abstract

Nucleotides are an important class of odorants for aquatic vertebrates such as frogs and fishes, but also have manifold signaling roles in other cellular processes. Recently, an adenosine receptor believed to belong to the adora2 clade has been identified as an olfactory receptor in zebrafish. Here, we set out to elucidate the evolutionary history of both this gene and its olfactory function. We have performed a thorough phylogenetic study in vertebrates, chordates and their sister group, ambulacraria, and show that the origin of the zebrafish olfactory receptor gene can be traced back to the most recent common ancestor of all three groups as a segregate sister clade (adorb) to the adora gene family. Eel, carp, and clawed frog all express adorb in a sparse and distributed pattern within their olfactory epithelium very similar to the pattern observed for zebrafish that is, consistent with a function as olfactory receptor. In sharp contrast, lamprey adorb-expressing cells are absent from the sensory region of the lamprey nose, but form a contiguous domain directly adjacent to the sensory region. Double-labeling experiments confirmed the expression of lamprey adorb in nonneuronal cells and are consistent with an expression in neuronal progenitor cells. Thus, adorb may have undergone a switch of function in the jawed lineage of vertebrates towards a role as olfactory receptor.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kowatschew, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Korsching, Sigrun, I UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-564838
DOI:	10.1093/gbe/evab211
Journal or Publication Title:	Genome Biol. Evol.
Volume:	13
Number:	9
Date:	2021
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1759-6653
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MULTIPLE SEQUENCE ALIGNMENT; SENSORY NEURONS; PHYLOGENETIC ANALYSIS; ODORANT RECEPTORS; EXPRESSION; PERFORMANCE; RESOURCE; BULB Multiple languages Evolutionary Biology; Genetics & Heredity Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/56483