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Provedor de dados:  ArchiMer
País:  France
Título:  Cryogenian evolution of stigmasteroid biosynthesis
Autores:  Hoshino, Yosuke
Poshibaeva, Aleksandra
Meredith, William
Snape, Colin
Poshibaev, Vladimir
Versteegh, Gerard J. M.
Kuznetsov, Nikolay
Leider, Arne
Van Maldegem, Lennart
Neumann, Mareike
Naeher, Sebastian
Moczydlowska, Malgorzata
Brocks, Jochen J.
Jarrett, Amber J. M.
Tang, Qing
Xiao, Shuhai
Mckirdy, David
Das, Supriyo Kumar
Alvaro, Jose Javier
Sansjofre, Pierre
Hallmann, Christian
Data:  2017-09
Ano:  2017
Resumo:  Sedimentary hydrocarbon remnants of eukaryotic C-26-C-30 sterols can be used to reconstruct early algal evolution. Enhanced C-29 sterol abundances provide algal cellmembranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive inventory of unambiguously syngenetic steranes in Neoproterozoic rocks. Our results show that the capacity for C-29 24ethyl- sterol biosynthesis emerged in the Cryogenian, that is, between 720 and 635 million years ago during the Neoproterozoic Snowball Earth glaciations, which were an evolutionary stimulant, not a bottleneck. This biochemical innovation heralded the rise of green algae to global dominance of marine ecosystems and highlights the environmental drivers for the evolution of sterol biosynthesis. The Cryogenian emergence of C-29 sterol biosynthesis places benchmark for verifying older sterane signatures and sets a new framework for our understanding of early algal evolution.
Tipo:  Text
Idioma:  Inglês
Identificador:  https://archimer.ifremer.fr/doc/00638/75021/75667.pdf

https://archimer.ifremer.fr/doc/00638/75021/75668.pdf

https://archimer.ifremer.fr/doc/00638/75021/75669.pdf

DOI:10.1126/sciadv.1700887

https://archimer.ifremer.fr/doc/00638/75021/
Editor:  Amer Assoc Advancement Science
Formato:  application/pdf
Fonte:  Science Advances (2375-2548) (Amer Assoc Advancement Science), 2017-09 , Vol. 3 , N. 9 , P. e1700887 (8p.)
Direitos:  info:eu-repo/semantics/openAccess

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