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Article
Iron uptake, transport and storage in marine brown algae
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 mar...
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Article
Open AccessThe effect of iron on Chilean Alexandrium catenella growth and paralytic shellfish toxin production as related to algal blooms
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 e...
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Article
Distribution of dissolved iron and bacteria producing the photoactive siderophore, vibrioferrin, in waters off Southern California and Northern Baja
Phytoplankton blooms can cause acute effects on marine ecosystems due either to their production of endogenous toxins or to their enormous biomass leading to major impacts on local economies and public health....
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Article
Open AccessEmission of volatile halogenated compounds, speciation and localization of bromine and iodine in the brown algal genome model Ectocarpus siliculosus
This study explores key features of bromine and iodine metabolism in the filamentous brown alga and genomics model Ectocarpus siliculosus. Both elements are accumulated in Ectocarpus, albeit at much lower concent...
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Article
Iron uptake and storage in the HAB dinoflagellate Lingulodinium polyedrum
The iron uptake and storage systems of terrestrial/higher plants are now reasonably well understood with two basic strategies being distinguished: Strategy I involves the induction of an Fe(III)-chelate reduct...
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Article
Molecular characterization of a homolog of the ferric-uptake regulator, Fur, from the marine bacterium Marinobacter algicola DG893
Full length recombinant iron regulatory protein, Fur, has been isolated and characterized from the algal-associated marine bacterium Marinobacter algicola DG893. Under nondenaturing conditions the Fur protein beh...
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Article
Detection of photoactive siderophore biosynthetic genes in the marine environment
Iron is an essential element for oceanic microbial life but its low bioavailability limits microorganisms in large areas of the oceans. To acquire this metal many marine bacteria produce organic chelates that ...
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Article
Iron transport in the genus Marinobacter
Marinobacter belong to the class of Gammaproteobacteria and these motile, halophilic or halotolerent bacteria are widely distributed throughout the world’s oceans having been isolated from a wide...
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Article
Siderophore-mediated iron uptake in two clades of Marinobacter spp. associated with phytoplankton: the role of light
Iron is an essential element for oceanic microbial life but its low bioavailability limits microorganisms in large areas of the oceans. To acquire this metal many marine bacteria produce organic chelates that ...
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Article
Open AccessThe Ectocarpus genome and the independent evolution of multicellularity in brown algae
The genome of Ectocarpus, a model organism for brown algae, has been sequenced. Brown algae are complex photosynthetic organisms that have adapted to life in rocky coastal environments. Genome analysis sheds ligh...
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Article
α-Diimine Ligand Coordination and C–H Bond Activation in the Reaction of Os3(CO)10(MeCN)2 with 6-R-2,2′-Bipyridine (where R = Et, Ph): X-ray Diffraction Structures of the Ortho-Metalated Hydride Clusters HOs3(CO)9(N2C10H6-6-R)
The reactivity of the labile cluster Os3(CO)10(MeCN)2 (1) with the monofunctionalized heterocyclic ligands 6-R-2,2′-bipyridine (where R = Et, Ph) has been investigated. The alkyl-substituted heterocycle 6-Et-2,2′...
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Article
Open AccessBoron and Marine Life: A New Look at an Enigmatic Bioelement
On the occasion of the 200th anniversary of the discovery of boron, we review the oceanic biogeochemistry of boron as well as suitable analytical techniques for its determination. This overview includes aspect...
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Article
A comparison of the coordination preferences of Zn, Co, and Cd(II) with the heteroscorpionate ligand (2-hydroxy-3-t-butyl-methylphenyl)bis (3,5-dimethylpyrazolyl)methane
Reaction of the Zn, Cd, or Co nitrate salts with the deprotonated ligand (2-hydroxy-3-t-butyl-methylphenyl)bis(3,5-dimethylpyrazolyl)methane (L1O−) in methanol produced the following complexes: [(L1OH)Zn(NO3)2] i...
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Article
Heterobactins: A new class of siderophores from Rhodococcus erythropolis IGTS8 containing both hydroxamate and catecholate donor groups
We report here on a new class of siderophores isolated from Rhodococcus erythropolis IGTS8, the first structurally characterized from any species of Rhodococcus and for which we suggest the name heterobactins. Th...
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Article
Methylation of neutral pseudotetrahedral zinc thiolate complexes: model reactions for alkyl group transfer to sulfur by zinc-containing enzymes
Eight scorpionate-zinc thiolate complexes, [(L1O)ZnSPh], [(L1O)ZnSPhF5], [(L1O)ZnSBz], [(L1O)ZnSPh2,6-Me], [(L1O)ZnSPh2,4-Me], \({\rm [(L1O)ZnSPh}^{{\rm 4 - NO}_{\rm 2} } {\rm ]}\) ...
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Article
Specificity and mechanism of rhizoferrin-mediated metal ion uptake
Rhizoferrin-mediated iron uptake was studied in two different classes of organisms: a rhizoferrin producing fungus, Absidia spinosa (Zygomycetes), and a ferric rhizoferrin utilizing bacterium, Morganella morganii
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Article
Identification of the ferrioxamine B receptor, FoxB, inEscherichia coli K12
The photoreactivep-azidobenzoyl analog of ferrioxamine B was used to show that ferrioxamine-B-mediated iron transport is separate and distinct from coprogen-mediated iron transport inEscherichia coli. Photolysis ...
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Article
Transport properties of N-acyl derivatives of the coprogen and ferrichrysin classes of siderophores inNeurospora crassa
Several derivatives of the coprogen and ferrichrysin classes of siderophores were synthesized as potential affinity labels of the iron uptake system inNeurospora crassa. While only one of these compounds has prov...
