Systematic identification and characterization of genes in the regulation and biogenesis of photosynthetic machinery.

Systematic identification and characterization of genes in the regulation and biogenesis of photosynthetic machinery.
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DOI:
10.1016/j.cell.2023.11.007
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发表时间:
2023-12-07
期刊:
影响因子:
64.5
通讯作者:
Jonikas, Martin C.
Jonikas, Martin C.
中科院分区:
生物学1区
文献类型:
--
作者:
Kafri, Moshe;Patena, Weronika;Martin, Lance;Wang, Lianyong;Gomer, Gillian;Ergun, Sabrina L.;Sirkejyan, Arthur K.;Goh, Audrey;Wilson, Alexandra T.;Gavrilenko, Sophia E.;Breker, Michal;Roichman, Asael;McWhite, Claire D.;Rabinowitz, Joshua D.;Cross, Frederick R.;Wuhr, Martin;Jonikas, Martin C.

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Photosynthesis is central to food production and the Earth’s biogeochemistry, yet the molecular basis for its regulation remains poorly understood. Here, using high-throughput genetics in the model eukaryotic alga Chlamydomonas reinhardtii, we identify with high confidence (false discovery rate [FDR] < 0.11) 70 poorly characterized genes required for photosynthesis. We then enable the functional characterization of these genes by providing a resource of proteomes of mutant strains, each lacking one of these genes. The data allow assignment of 34 genes to the biogenesis or regulation of one or more specific photosynthetic complexes. Further analysis uncovers biogenesis/regulatory roles for at least seven proteins, including five photosystem I mRNA maturation factors, the chloroplast translation factor MTF1, and the master regulator PMR1, which regulates chloroplast genes via nuclear-expressed factors. Our work provides a rich resource identifying regulatory and functional genes and placing them into pathways, thereby opening the door to a system-level understanding of photosynthesis. Kafri et al. used a genetic screen to identify 70 previously uncharacterized genes required for photosynthesis in the model alga Chlamydomonas reinhardtii. Using mutant proteome profiling, they assign many of the genes to pathways, revealing biogenesis and regulatory factors including the master regulator PMR1, which regulates chloroplast genes via nuclear-expressed factors.
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