The Scaly-foot Snail genome and implications for the origins of biomineralised armour

Jin Sun, Chong Chen, Norio Miyamoto, Runsheng Li, Julia D. Sigwart, Ting Xu, Yanan Sun, Wai Chuen Wong, Jack C.H. Ip, Weipeng Zhang, Yi Lan, Dass Bissessur, Tomo o. Watsuji, Hiromi Kayama Watanabe, Yoshihiro Takaki, Kazuho Ikeo, Nobuyuki Fujii, Kazutoshi Yoshitake, Jian Wen Qiu, Ken TakaiPei Yuan Qian*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)
7 Downloads (Pure)

Abstract

The Scaly-foot Snail, Chrysomallon squamiferum, presents a combination of biomineralised features, reminiscent of enigmatic early fossil taxa with complex shells and sclerites such as sachtids, but in a recently-diverged living species which even has iron-infused hard parts. Thus the Scaly-foot Snail is an ideal model to study the genomic mechanisms underlying the evolutionary diversification of biomineralised armour. Here, we present a high-quality whole-genome assembly and tissue-specific transcriptomic data, and show that scale and shell formation in the Scaly-foot Snail employ independent subsets of 25 highly-expressed transcription factors. Comparisons with other lophotrochozoan genomes imply that this biomineralisation toolkit is ancient, though expression patterns differ across major lineages. We suggest that the ability of lophotrochozoan lineages to generate a wide range of hard parts, exemplified by the remarkable morphological disparity in Mollusca, draws on a capacity for dynamic modification of the expression and positioning of toolkit elements across the genome.

Original languageEnglish
Article number1657
JournalNature Communications
Volume11
Issue number1
DOIs
Publication statusPublished - 08 Apr 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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