This article is a celebration of the life and work of Carl J. Carrano who, from a childhood in Long Island, New York, built a career in bioinorganic chemistry, especially in the context of metal uptake and halogen metabolism in microbes and marine organisms.
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DFT and TD-DFT studies to elucidate the configurational isomers of ferric aerobactin, ferric petrobactin, and their ferric photoproducts.
Biometals
October 2024
Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA, 92182-1030, USA.
Article Synopsis
- Iron-chelating siderophores like aerobactin and petrobactin are produced by marine bacteria to capture iron in low-iron environments, and those with citrate can undergo light-induced changes to form new products.
- Researchers used density functional theory to analyze the structures and energies of the iron-coordinated forms of aerobactin and petrobactin, as well as their light-induced photoproducts.
- The study also involved calculating UV-Vis absorption spectra and comparing them with experimental data, supporting specific configurations for ferric aerobactin while showing that the spectra of ferric petrobactin were largely consistent regardless of its specific structure.
Synchrotron X-rays reveal the modes of Fe binding and trace metal storage in the brown algae Laminaria digitata and Ectocarpus siliculosus.
Metallomics
October 2023
School of Biological Sciences, University of Aberdeen, Cruickshank Building, St Machar Drive, Aberdeen AB24 3UU, UK.
Iron is accumulated symplastically in kelp in a non-ferritin core that seems to be a general feature of brown algae. Microprobe studies show that Fe binding depends on tissue type. The sea is generally an iron-poor environment and brown algae were recognized in recent years for having a unique, ferritin-free iron storage system.
View Article and Find Full Text PDFIron uptake, transport and storage in marine brown algae.
Biometals
April 2023
Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA, 92182-1030, USA.
Iron is a vital although biologically inaccessible trace nutrient for nearly all forms of life but "free" iron can be deleterious to cells and thus iron uptake and storage must be carefully controlled. The marine environment is particularly iron poor making mechanisms for its uptake and storage even more imperative. In this brief review we explore the known and potential iron uptake and storage pathways for the biologically and economically important marine brown macroalgae (seaweeds/kelps).
View Article and Find Full Text PDFThe effect of iron on Chilean Alexandrium catenella growth and paralytic shellfish toxin production as related to algal blooms.
Biometals
February 2022
Microbial Genomics and Ecology, Office of Academic Research and Industry-Government Collaboration, Hiroshima University, 1-3-2 Kagamiyama, Higashi-Hiroshima City, Hiroshima, 739-8511, Japan.
The dinoflagellate Alexandrium catenella is a well-known paralytic shellfish toxin producer that forms harmful algal blooms (HABs) worldwide. Blooms of this species have repeatedly brought severe ecological and economic impacts to Chile, especially in the southern region, where the shellfish and salmon industries are world-famous. The mechanisms of such HABs have been intensively studied but are still unclear.
View Article and Find Full Text PDFPhotoactive siderophores: Structure, function and biology.
J Inorg Biochem
August 2021
Department of Chemistry and Biochemistry, San Diego State University, United States. Electronic address:
It is well known that bacteria and fungi have evolved sophisticated systems for acquiring the abundant but biologically inaccessible trace element iron. These systems are based on high affinity Fe(III)-specific binding compounds called siderophores which function to acquire, transport, and process this essential metal ion. Many hundreds of siderophores are now known and their numbers continue to grow.
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