Nicole Frankenberg-Dinkel

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Although the oceanic cyanobacterium Prochlorococcus harvests light with a chlorophyll antenna [1-3] rather than with the phycobilisomes that are typical of cyanobacteria, some strains express genes that are remnants of the ancestral Synechococcus phycobilisomes [4]. Similarly, some Prochlorococcus cyanophages, which often harbor photosynthesis-related genes(More)
Phytochrome photoreceptors sense red and far-red light through photointerconversion between two stable conformations, a process mediated by a linear tetrapyrrole chromophore. Originally, phytochromes were thought to be confined to photosynthetic organisms including cyanobacteria, but they have been recently discovered in heterotrophic bacteria and fungi,(More)
Heme oxygenases (HO) degrade heme yielding iron, carbon monoxide and one of four possible biliverdin (BV) isomers. Pseudomonas aeruginosa PAO1 is thus far the only organism to contain two HOs with different regiospecificities: BphO and PigA. While BphO cleaves heme to exclusively yield BV IXα, PigA produces the BV isomers IXβ and IXδ. We bioinformatically(More)
The cryptophyte phycocyanin Cr-PC577 from Hemiselmis pacifica is a close relative of Cr-PC612 found in Hemiselmis virescens and Hemiselmis tepida. The two biliproteins differ in that Cr-PC577 lacks the major peak at around 612 nm in the absorption spectrum. Cr-PC577 was thus purified and characterized with respect to its bilin chromophore composition. Like(More)
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