D
Dick Van der Helm
Researcher at University of Oklahoma
Publications - 128
Citations - 3783
Dick Van der Helm is an academic researcher from University of Oklahoma. The author has contributed to research in topics: Crystal structure & Absolute configuration. The author has an hindex of 30, co-authored 128 publications receiving 3706 citations. Previous affiliations of Dick Van der Helm include University of Victoria.
Papers
More filters
Journal ArticleDOI
Crystal structure of the outer membrane active transporter FepA from Escherichia coli.
Susan K. Buchanan,Susan K. Buchanan,Barbara S. Smith,Lalitha Venkatramani,Di Xia,Lothar Esser,Maya Palnitkar,Ranjan Chakraborty,Dick Van der Helm,Johann Deisenhofer +9 more
TL;DR: The blockage of the pore suggests that the N–terminal domain must undergo a conformational rearrangement to allow ligand transport into the periplasm, and this structure could provide a signaling pathway between the processes of ligand recognition and TonB–mediated transport.
Journal ArticleDOI
Structural Basis of Gating by the Outer Membrane Transporter FecA
Andrew D. Ferguson,Ranjan Chakraborty,Ranjan Chakraborty,Barbara S. Smith,Lothar Esser,Lothar Esser,Dick Van der Helm,Dick Van der Helm,Johann Deisenhofer +8 more
TL;DR: The crystallographic structure of the integral outer membrane receptor FecA from Escherichia coli with and without ferric citrate is presented, establishing the structural basis of gating for receptors dependent on the cytoplasmic membrane protein TonB.
Journal ArticleDOI
Structure of anguibactin, a unique plasmid-related bacterial siderophore from the fish pathogen Vibrio anguillarum
M. A. F. Jalal,M. B. Hossain,Dick Van der Helm,J. Sanders-Loehr,Luis A. Actis,Jorge H. Crosa +5 more
Journal ArticleDOI
Cyclic peptides from the ascidian Lissoclinum patella: conformational analysis of patellamide D by X-ray analysis and molecular modeling
Francis J. Schmitz,Mohamad B. Ksebati,James S. Chang,Junwei Wang,M. Bilayet Hossain,Dick Van der Helm,Michael H. Engel,Andrei Serban,Jeff A. Silfer +8 more