globalchange  > 气候减缓与适应
DOI: 10.1002/2017JG004067
Scopus记录号: 2-s2.0-85043380093
论文题名:
Geological and Chemical Factors that Impacted the Biological Utilization of Cobalt in the Archean Eon
作者: Moore E.K.; Hao J.; Prabhu A.; Zhong H.; Jelen B.I.; Meyer M.; Hazen R.M.; Falkowski P.G.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期:3
起始页码: 743
结束页码: 759
语种: 英语
英文关键词: Archean ; biological utilization ; cobalt ; geobio-coevolution
Scopus关键词: Archean ; chemical reaction ; chemical weathering ; cobalt ; enzyme ; enzyme activity ; hydrothermal system ; marine environment ; redox conditions ; trace metal ; transition element
英文摘要: The geosphere and biosphere coevolved and influenced Earth's biological and mineralogical diversity. Changing redox conditions influenced the availability of different transition metals, which are essential components in the active sites of oxidoreductases, proteins that catalyze electron transfer reactions across the tree of life. Despite its relatively low abundance in the environment, cobalt (Co) is a unique metal in biology due to its importance to a wide range of organisms as the metal center of vitamin B12 (aka cobalamin, Cbl). Cbl is vital to multiple methyltransferase enzymes involved in energetically favorable metabolic pathways. It is unclear how Co availability is linked to mineral evolution and weathering processes. Here we examine important biological functions of Co, as well as chemical and geological factors that may have influenced the utilization of Co early in the evolution of life. Only 66 natural minerals are known to contain Co as an essential element. However, Co is incorporated as a minor element in abundant rock-forming minerals, potentially representing a reliable source of Co as a trace element in marine systems due to weathering processes. We developed a mineral weathering model that indicates that dissolved Co was potentially more bioavailable in the Archean ocean under low S conditions than it is today. Mineral weathering, redox chemistry, Co complexation with nitrogen-containing organics, and hydrothermal environments were crucial in the incorporation of Co in primitive metabolic pathways. These chemical and geological characteristics of Co can inform the biological utilization of other trace metals in early forms of life. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114340
Appears in Collections:气候减缓与适应

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作者单位: Environmental Biophysics and Molecular Ecology Program, Department of Earth, Ocean and Atmospheric Sciences, Rutgers University, New Brunswick, NJ, United States; Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD, United States; Laboratoire de géologie de Lyon, Observatoire de Lyon, Université Claude Bernard Lyon1, Villeurbanne, France; Tetherless World Constellation, Rensselaer Polytechnic Institute, Troy, NY, United States; Geophysical Laboratory, Carnegie Institution for Science, Washington, DC, United States; Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ, United States

Recommended Citation:
Moore E.K.,Hao J.,Prabhu A.,et al. Geological and Chemical Factors that Impacted the Biological Utilization of Cobalt in the Archean Eon[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(3)
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