Recurrent DCC gene losses during bird evolution
In: ISSN: 2045-2322, 2017
academicJournal
Zugriff:
International audience ; During development, midline crossing by axons brings into play highly conserved families of receptors and ligands. The interaction between the secreted ligand Netrin-1 and its receptor Deleted in Colorectal Carcinoma (DCC) is thought to control midline attraction of crossing axons. Here, we studied the evolution of this ligand/receptor couple in birds taking advantage of a wealth of newly sequenced genomes. From phylogeny and synteny analyses we can infer that the DCC gene has been conserved in most extant bird species, while two independent events have led to its loss in two avian groups, passeriformes and galliformes. These convergent accidental gene loss events are likely related to chromosome Z rearrangement. We show, using whole-mount immunostaining and 3Disco clearing, that in the nervous system of all birds that have a DCC gene, DCC protein expression pattern is similar to other vertebrates. Surprisingly, we show that the early developmental pattern of commissural tracts is comparable in all birds, whether or not they have a DCC receptor. Interestingly, only 4 of the 5 genes encoding secreted netrins, the DCC ligands in vertebrates, were found in birds, but Netrin-5 was absent. Together, these results support a remarkable plasticity of commissural axon guidance mechanisms in birds.
Titel: |
Recurrent DCC gene losses during bird evolution
|
---|---|
Autor/in / Beteiligte Person: | Friocourt, François ; Lafont, Anne-Gaëlle ; Kress, Clémence ; Pain, Bertrand ; Manceau, Marie ; Dufour, Sylvie ; Chédotal, Alain ; Université Pierre et Marie Curie - Paris 6 (UPMC) ; Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) ; Université de Caen Normandie (UNICAEN) ; Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) ; Institut cellule souche et cerveau / Stem Cell and Brain Research Institute (SBRI) ; Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) ; Centre interdisciplinaire de recherche en biologie (CIRB) ; MemoLife, Labex ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Collège de France (CdF (institution))-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris) ; Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS) |
Link: | |
Zeitschrift: | ISSN: 2045-2322, 2017 |
Veröffentlichung: | HAL CCSD ; Nature Publishing Group, 2017 |
Medientyp: | academicJournal |
DOI: | 10.1038/srep37569 |
Schlagwort: |
|
Sonstiges: |
|