Full-length transcriptome sequencing of Heliocidaris crassispina using PacBio single-molecule real-time sequencing.

The lack of high-throughput sequencing data makes the research progress of Heliocidaris crassispina slow. Therefore, we used PacBio single-molecule real-time sequencing to generate the first full-length transcriptome. Here, 31,181 isoforms were obtained, with an average length of 2383.20 and a N50 length of 2732 bp. Meanwhile, 764 alternative splicing (AS) events, 5098 long-noncoding RNAs (LncRNAs), 6978 simple sequence repeats (SSRs), and 950 hypothetical transcript factors (TFs) were identified. Moreover, five key innate immune pattern recognition receptors (PRRs), including toll-like receptor (TLR), NACHT domain and leucine-rich repeat (NLR), scavenger receptor cysteine-rich (SRCR), peptidoglycan recognition proteins (PGRP), and gram-negative binding proteins (GNBP), were searched in the transcriptome. In addition, 37 isoforms enriched in KEGG and GO immune systems were also detected. The study provid abundant data support for the current research on H. crassispina. • The first full-length transcriptome of sea urchin H. crassispina has been constructed. • A total of 31,181 isoforms with a N50 length of 2732 bp were obtained. • 764 AS events, 5098 LncRNAs, 6978 SSRs, and 950 TFs were identified in the transcriptome. • The multiplicity of key innate immune PRRs were identified in the study, including TLR, NLR, SRCR, PGRP, and GNBP. [ABSTRACT FROM AUTHOR]