期刊
SCIENCE
卷 353, 期 6302, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaf9178
关键词
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资金
- NSF [MCB-1021725]
- European Commission Marie Sklodowska-Curie Global Fellowship [660652]
- Photosynthetic Antenna Research Center (PARC), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC 0001035]
- PARC
- Direct For Biological Sciences
- Div Of Molecular and Cellular Bioscience [1021725, 1613022] Funding Source: National Science Foundation
- Marie Curie Actions (MSCA) [660652] Funding Source: Marie Curie Actions (MSCA)
Chlorophyll f (Chl f) permits some cyanobacteria to expand the spectral range for photosynthesis by absorbing far-red light. We used reverse genetics and heterologous expression to identify the enzyme for Chl f synthesis. Null mutants of super-rogue psbA4 genes, divergent paralogs of psbA genes encoding the D1 core subunit of photosystem II, abolished Chl f synthesis in two cyanobacteria that grow in far-red light. Heterologous expression of the psbA4 gene, which we rename chlF, enables Chl f biosynthesis in Synechococcus sp. PCC 7002. Because the reaction requires light, Chl f synthase is probably a photo-oxidoreductase that employs catalytically useful Chl a molecules, tyrosine Y-Z, and plastoquinone (as does photosystem II) but lacks a Mn4Ca1O5 cluster. Introduction of Chl f biosynthesis into crop plants could expand their ability to use solar energy.
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