Date of Award
Marine cyanobacteria of the genus Synechococcushave light harvesting complexes composed of the phycobiliproteins phycoerythrin I and phycoerythrin II. Synechyococcussp RS9916 is capable of altering the ratio of blue-light absorbing phycourobilin to green-light absorbing phycoerythrobilin ligated to these phycoerythrin proteins through a process known as Type IV Chromatic Acclimation (CA4). During CA4, the mpeZ, unk10and fciCgenes are upregulated under blue light, and these three genes are responsible for increasing the phycourobilin content ligated to phycoerythrin I and II. The role of fciCas a transcription activator of mpeZ, andunk10 genes is explored using knockout and overexpression mutants. The role of unk10is explored in phycourobilin ligation to a-phycoerythrin II using a heterologous recombinant protein expression system.
Hunter, John M. III, "Characterization of genes involved in Type IV Chromatic Acclimation in Synechococcus RS9916" (2020). University of New Orleans Theses and Dissertations. 2755.
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