Genes with spiralian-specific protein motifs are expressed in spiralian ciliary bands

Longjun Wu, Laurel S. Hiebert, Marleen Klann, Yale Passamaneck, Benjamin R. Bastin, Stephan Q. Schneider, Mark Q. Martindale, Elaine C. Seaver, Svetlana A. Maslakova and J. David Lambert ()
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Longjun Wu: University of Rochester
Laurel S. Hiebert: University of Oregon
Marleen Klann: University of Florida
Yale Passamaneck: University of Florida
Benjamin R. Bastin: Iowa State University
Stephan Q. Schneider: Iowa State University
Mark Q. Martindale: University of Florida
Elaine C. Seaver: University of Florida
Svetlana A. Maslakova: University of Oregon
J. David Lambert: University of Rochester

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Spiralia is a large, ancient and diverse clade of animals, with a conserved early developmental program but diverse larval and adult morphologies. One trait shared by many spiralians is the presence of ciliary bands used for locomotion and feeding. To learn more about spiralian-specific traits we have examined the expression of 20 genes with protein motifs that are strongly conserved within the Spiralia, but not detectable outside of it. Here, we show that two of these are specifically expressed in the main ciliary band of the mollusc Tritia (also known as Ilyanassa). Their expression patterns in representative species from five more spiralian phyla—the annelids, nemerteans, phoronids, brachiopods and rotifers—show that at least one of these, lophotrochin, has a conserved and specific role in particular ciliated structures, most consistently in ciliary bands. These results highlight the potential importance of lineage-specific genes or protein motifs for understanding traits shared across ancient lineages.

Date: 2020
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DOI: 10.1038/s41467-020-17780-7

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