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Scheme 1 | Microbial Cell Factories

Scheme 1

From: Artificial complementary chromatic acclimation gene expression system in Escherichia coli

Scheme 1

CCA system with red and green light-regulated gene expression system, derived from Synechococcus sp. PCC7335 [17] with some modifications. a Under red light, RcaE, RcaF, and RcaC are phosphorylated. Phosphorylated RcaC binding to L-box within the promoter region activates pcyA and cpc2 transcription and represses pebAB transcription. b Under green light, RcaE, RcaF, and RcaC are dephosphorylated. Unphosphorylated RcaC does not bind to L-box; consequently, pcyA and cpc2 transcriptions are inactivated, and pebAB is transcribed

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