Search Results - "Van der Helm, Dick"

Structural Basis of Gating by the Outer Membrane Transporter FecA by Ferguson, Andrew D., Chakraborty, Ranjan, Smith, Barbara S., Esser, Lothar, van der Helm, Dick, Deisenhofer, Johann

“…Siderophore-mediated acquisition systems facilitate iron uptake. We present the crystallographic structure of the integral outer membrane receptor FecA from…”
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Amido-3-hydroxypyridin-4-ones as Iron(III) Ligands by Piyamongkol, Sirivipa, Ma, Yong M., Kong, Xiao L., Liu, Zu D., Aytemir, Mutlu D., van der Helm, Dick, Hider, Robert C.

“…The synthesis and physicochemical properties of a range of 2‐ and 6‐amido‐3‐hydroxypyridin‐4‐ones are described. All the amido‐substituted…”
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Crystal structure of the outer membrane active transporter FepA from Escherichia coli by Deisenhofer, Johann, Buchanan, Susan K, Smith, Barbara S, Venkatramani, Lalitha, Xia, Di, Esser, Lothar, Palnitkar, Maya, Chakraborty, Ranjan, van der Helm, Dick

“…Integral outer membrane receptors for iron chelates and vitamin B12 carry out specific ligand transport against a concentration gradient. Energy for active…”
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Longithorones, Unique Prenylated Para- and Metacyclophane Type Quinones from the Tunicate Aplidium longithorax by Fu, Xiong, Hossain, M. Bilayet, Schmitz, Francis J, van der Helm, Dick

“…A group of nine farnesylated quinones (1−9) featuring new macrocyclic skeletons formed by farnesyl units bridging the quinones in the meta or para positions…”
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Structure of Antimycin A1, a Specific Electron Transfer Inhibitor of Ubiquinol−Cytochrome c Oxidoreductase by Kim, Hoeon, Esser, Lothar, Hossain, M. Bilayet, Xia, Di, Yu, Chang-An, Rizo, Josep, van der Helm, Dick, Deisenhofer, Johann

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Synthesis, Physicochemical Properties, and Biological Evaluation of Hydroxypyranones and Hydroxypyridinones:  Novel Bidentate Ligands for Cell-Labeling by Ellis, Beverley L, Duhme, Anne K, Hider, Robert C, Hossain, M. Bilayet, Rizvi, Safia, van der Helm, Dick

“…The synthesis of a range of hydroxypyranones and hydroxypyridinones with potential for the chelation of indium(III) is described. The crystal structures of two…”
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Alkaloids from the Tunicate Polycarpa aurata from Chuuk Atoll by Abas, Sayed A, Hossain, M. Bilayet, van der Helm, Dick, Schmitz, Francis J, Laney, Maureen, Cabuslay, Ronnel, Schatzman, Randall C

“…Two new alkaloids, polycarpine (1) and N,N-didesmethylgrossularine-1 (4), have been isolated from extracts of the ascidian Polycarpa aurata collected in Chuuk,…”
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Longithorone A: Unprecedented Dimeric Prenylated Quinone from the Tunicate Aplydium longithorax by Fu, Xiong, Hossain, M. Bilayet, van der Helm, Dick, Schmitz, Francis J

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Cytotoxic aromatic alkaloids from the ascidian Amphicarpa meridiana and Leptoclinides sp.: meridine and 11-hydroxyascididemin by Schmitz, Francis J, DeGuzman, Forecita S, Hossain, M. Bilayet, Van der Helm, Dick

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Structure and Absolute Stereochemistry of Salvimirzacolide, a New Sesterterpene from Salvia mirzayanii by Moghaddam, Firoz Matloubi, Amiri, Raheba, Alam, Maktoob, Hossain, M. Bilayet, van der Helm, Dick

“…A new sesterterpene, salvimirzacolide (1), was isolated from the aerial parts of Salvia mirzayanii and its structure established by X-ray diffraction analysis…”
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Molecular mechanism of ferricsiderophore passage through the outer membrane receptor proteins of Escherichia coli by Chakraborty, Ranjan, Storey, Erin, van der Helm, Dick

“…Iron is an essential nutrient for all microorganisms with a few exceptions. Microorganisms use a variety of systems to acquire iron from the surrounding…”
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New briarein diterpenes from the Caribbean gorgonians Erythropodium caribaeorum and Briareum sp by Pordesimo, Evamarie O, Schmitz, Francis J, Ciereszko, Leon S, Hossain, M. Bilayet, Van der Helm, Dick

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Isolation and Structure of Isoculmorin from the Marine Fungus Kallichroma tethys by Alam, Maktoob, Jones, E. B. Gareth, Hossain, M. Bilayet, van der Helm, Dick

“…A new tricyclic sesquiterpeneisoculmorinwas isolated from the marine fungus Kallichroma tethys and its structure determined by X-ray crystallography…”
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Organometallic compounds of the lanthanides. 64. Synthesis and x-ray crystal structures of dimethylgermyl bis(tetramethylcyclopentadienyl) halide and alkyl derivatives of the lanthanides by Schumann, Herbert, Esser, Lothar, Loebel, Joerg, Dietrich, Andreas, Van der Helm, Dick, Ji, Xinhua

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Longithorone A: Unprecedented Dimeric Prenylated Quinone from the Tunicate Aplidium longithorax. [Erratum to document cited in CA122:261392] by Fu, Xiong, Hossain, M. Bilayet, van der Helm, Dick, Schmitz, Francis J

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Structure of ferric pseudobactin: a siderophore from a plant growth promoting Pseudomonas by Teintze, Martin, Hossain, M. B, Barnes, C. L, Leong, John, Van der Helm, Dick

“…Both plant growth promoting Pseudomonas B10 and its yellow-green, fluorescent iron transfer agent (siderophore) pseudobactin enhance the growth of the potato…”
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Sclerophytin C-F: isolation and structures of four new diterpenes from the soft coral Sclerophytum capitalis by Alam, Maktoob, Sharma, Perveen, Zektzer, Andrew S, Martin, Gary E, Ji, Xinhua, Van der Helm, Dick

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Patagonicol: A Diterpenoid from the Chinese Soft Coral Alcyonium patagonicum by Su, Jingyu, Zheng, Yaohua, Zeng, Longmei, Pordesimo, Eva O, Schmitz, Francis J, Hossain, M. Bilayet, van der Helm, Dick

“…Patagonicol [1], a diterpenoid with a eunicellin skeleton, was isolated from the soft coral Alcyonium patagonicum. The structure of 1 was determined by X-ray…”
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Structure of anguibactin, a unique plasmid-related bacterial siderophore from the fish pathogen Vibrio anguillarum by Jalal, M. A. F, Hossain, M. B, Van der Helm, Dick, Sanders-Loehr, J, Actis, L. A, Crosa, J. H

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Molecular Modeling Studies of a Ferric Hexadentate 3-Hydroxy-2(1H)-pyridinone Complex and an Analogue by Molecular Mechanics, Molecular Dynamics, and Free Energy Perturbation Simulations by Xiao, Gaoyi, van der Helm, Dick, Hider, Robert C, Rai, Bejeya L

“…For the design of ligands specific for iron(III), it is important to explore the molecular conformations of both the ligand and the metal complex since they…”
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