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A genomic survey shows that the haloarchaeal type Tyrosyl-tRNA Synthetase is not a synapomorphy of opisthokonts
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The haloarchaeal-type tyrosyl tRNA synthetase (tyrRS) have previously been proposed to be a molecular synapomorphy of the opisthokonts. To re-evaluate this we have performed a taxon-wide genomic survey of tyrRS in eukaryotes and prokaryotes. Our phylogenetic trees group eukaryotes with archaea, with all opisthokonts sharing the haloarchaeal-type tyrRS. However, this type of tyrRS is not exclusive to opisthokonts, since it also encoded by two amoebozoans. Whether this is a consequence of lateral gene transfer or lineage sorting remains unsolved, but in any case haloarchaeal-type tyrRS is not a synapomorphy of opisthokonts. This demonstrates that molecular markers should be re-evaluated once a better taxon sampling becomes available.
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SHADWICK, John d.l., RUIZ TRILLO, Iñaki. A genomic survey shows that the haloarchaeal type Tyrosyl-tRNA Synthetase is not a synapomorphy of opisthokonts. _European Journal of Protistology_. 2012. Vol. 48, núm. 1, pàgs. 89-93. [consulta: 20 de gener de 2026]. ISSN: 0932-4739. [Disponible a: https://hdl.handle.net/2445/126591]