Transcriptomic profiling of the mussel <i>Mytilus trossulus</i> with a special emphasis on integrin-like genes during development

This study is based on the Illumina RNA-sequencing data obtained for a <i>de novo</i> assembly of the transcriptome from early developmental stages and some tissues and cells of the adult mussel <i>Mytilus trossulus</i> (Mytilidae, Mollusca) using the Trinity program. A total of 200,079 contigs were obtained, and compared to the NCBI database using BLAST to search for sequence similarity. The number of annotated contigs under the GO term 3 categories was estimated to reach 19.96%. The BUSCO analysis determined a level of 99.2% completeness for the assembled transcriptome. The main findings include evidence that the mussel β integrin-like protein sequences are very similar to the β integrin-like proteins so far sequenced for all classes of Mollusca, while the highest similarity is observed between mussel and oyster (<i>Crasostrea gigas</i>) β integrin-like proteins. Our transcriptome dataset contributes to the genetic databases of non-model animals such as bivalves and represents the first characterization of expressed sequences during early development of the mollusc <i>M. trossulus</i> from the Sea of Japan including the identification of candidate genes involved in cell adhesion.