期刊
SCIENCE
卷 300, 期 5621, 页码 929-931出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1083075
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资金
- NIGMS NIH HHS [GM45162] Funding Source: Medline
Complex iron-sulfur metalloclusters form the active sites of the enzymes that catalyze redox transformations of N-2, CO, and H-2, which are likely components of Earth's primordial atmosphere. Although these centers reflect the organizational principles of simpler iron-sulfur clusters, they exhibit extensive elaborations that confer specific ligand-binding and catalytic properties. These changes were probably achieved through evolutionary processes, including the fusion of small clusters, the addition of new metals, and the development of cluster assembly pathways, driven by selective pressures resulting from changes in the chemical composition of the biosphere.
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