Genomic insights of body plan transitions from bilateral to pentameral symmetry in echinoderms
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Published version
Date
2020
Authors
Li, Yongxin
Omori, Akihito
Flores, Rachel L.
Satterfield, Sheri
Nguyen, Christine
Ota, Tatsuya
Tsurugaya, Toko
Ikuta, Tetsuro
Ikeo, Kazuho
Kikuchi, Mani
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Published version
OA Version
Citation
Y. Li, A. Omori, R.L. Flores, S. Satterfield, C. Nguyen, T. Ota, T. Tsurugaya, T. Ikuta, K. Ikeo, M. Kikuchi, J.C.K. Leong, A. Reich, M. Hao, W. Wan, Y. Dong, Y. Ren, S. Zhang, T. Zeng, M. Uesaka, Y. Uchida, X. Li, T.F. Shibata, T. Bino, K. Ogawa, S. Shigenobu, M. Kondo, F. Wang, L. Chen, G. Wessel, H. Saiga, R.A. Cameron, B. Livingston, C. Bradham, W. Wang, N. Irie. 2020. "Genomic insights of body plan transitions from bilateral to pentameral symmetry in Echinoderms" Communications Biology, Volume 3, Issue 1. https://doi.org/10.1038/s42003-020-1091-1
Abstract
Echinoderms are an exceptional group of bilaterians that develop pentameral adult symmetry from a bilaterally symmetric larva. However, the genetic basis in evolution and development of this unique transformation remains to be clarified. Here we report newly sequenced genomes, developmental transcriptomes, and proteomes of diverse echinoderms including the green sea urchin (L. variegatus), a sea cucumber (A. japonicus), and with particular emphasis on a sister group of the earliest-diverged echinoderms, the feather star (A. japonica). We learned that the last common ancestor of echinoderms retained a well-organized Hox cluster reminiscent of the hemichordate, and had gene sets involved in endoskeleton development. Further, unlike in other animal groups, the most conserved developmental stages were not at the body plan establishing phase, and genes normally involved in bilaterality appear to function in pentameric axis development. These results enhance our understanding of the divergence of protostomes and deuterostomes almost 500 Mya.
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