Universität zu Köln

Sharma, Kanika, Syed, Adnan S., Ferrando, Sara, Mazan, Sylvie and Korsching, Sigrun I. ORCID: 0000-0002-5450-172X (2019). The Chemosensory Receptor Repertoire of a True Shark Is Dominated by a Single Olfactory Receptor Family. Genome Biol. Evol., 11 (2). S. 398 - 406. OXFORD: OXFORD UNIV PRESS. ISSN 1759-6653

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Abstract

Throughout the animal kingdom chemical senses are one of the primary means by which organisms make sense of their environment. To achieve perception of complex chemosensory stimuli large repertoires of olfactory and gustatory receptors are employed in bony vertebrates, which are characterized by high evolutionary dynamics in receptor repertoire size and composition. However, little is known about their evolution in earlier diverging vertebrates such as cartilaginous fish, which include sharks, skates, rays, and chimeras. Recently, the olfactory repertoire of a chimera, elephant shark, was found to be curiously reduced in odorant receptor number. Elephant sharks rely heavily on electroreception to localize prey; thus, it is unclear how representative their chemosensory receptor repertoire sizes would be for cartilaginous fishes in general. Here, we have mined the genome of a true shark, Scyliorhinus canicula (catshark) for olfactory and gustatory receptors, and have performed a thorough phylogenetic study to shed light on the evolution of chemosensory receptors in cartilaginous fish. We report the presence of several gustatory receptors of the TAS1R family in catshark and elephant shark, whereas TAS2R receptors are absent. The catshark olfactory repertoire is dominated by V2R receptors, with 5-8 receptors in the other three families (OR, ORA, TAAR). Species-specific expansions are mostly limited to the V2R family. Overall, the catshark chemosensory receptor repertoires are generally similar in size to those of elephant shark, if somewhat larger, showing similar evolutionary tendencies across over 400Myr of separate evolution between catshark and elephant shark.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Sharma, Kanika UNSPECIFIED UNSPECIFIED UNSPECIFIED Syed, Adnan S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ferrando, Sara UNSPECIFIED UNSPECIFIED UNSPECIFIED Mazan, Sylvie UNSPECIFIED UNSPECIFIED UNSPECIFIED Korsching, Sigrun I. UNSPECIFIED orcid.org/0000-0002-5450-172X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-157036
DOI:	10.1093/gbe/evz002
Journal or Publication Title:	Genome Biol. Evol.
Volume:	11
Number:	2
Page Range:	S. 398 - 406
Date:	2019
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1759-6653
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Institute for Genetics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EVOLUTIONARY DYNAMICS; TASTE; GENES; IDENTIFICATION; PERFORMANCE; ORIGIN; MAFFT Multiple languages Evolutionary Biology; Genetics & Heredity Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15703