Chemistry
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High-resolution differential ion mobility separations/orbitrap mass spectrometry without buffer gas limitations
(American Chemical Society, 2019-04-29)Strong orthogonality between differential ion mobility spectrometry (FAIMS) and mass spectrometry (MS) makes their hybrid a powerful approach to separate isomers and isobars. Harnessing that power depends on high resolution ... -
N-methyl-4-phenylpyridinium scaffolds containing lipophilic compounds are potent complex i inhibitors and selective dopaminergic toxins
(ACS, 2019-04-01)Although the exact cause or causes of Parkinson's disease (PD) are not fully understood, it is believed that environmental factors play a major role. The discovery that a synthetic chemical, 1-methyl-4-phenyl-1,2,3,6-tet ... -
Porphyrin molecules that selectively bind to the phosphatidylglycerol (PG) head group, a lipid found in bacterial membrane
(Wichita State University, 2019-04-26)Porphyrin molecules that selectively bind to the phosphatidylglycerol (PG) head group, a lipid found in bacterial membrane have been previously reported by our research group. A tetrakis-ammonium glycine picket porphyrin ... -
Online preconcentration of high-salt samples using pressure-assisted field-amplified sample injection in flow-gated capillary electrophoresis
(Wichita State University, 2019-04-26)Capillary electrophoresis (CE) is a valuable separation method; however, its detection sensitivity is often limited by the small sample volumes injected. Different strategies have been developed to enhance the sensitivity, ... -
Palladin compensates for branching complex in promoting actin-based motility in listeria
(Wichita State University, 2019-04-26)Palladin is an actin binding protein which has important functions in cell motility both in normal cells during development or in wound healing and in metastatic cancers. The Beck lab has recently shown that palladin ... -
Putative structural rearrangements associated with the interaction of macrocyclic inhibitors with norovirus 3CL protease
(John Wiley and Sons, 2019-03-18)Human noroviruses are the primary cause of outbreaks of acute gastroenteritis worldwide. The problem is further compounded by the current lack of norovirus-specific antivirals or vaccines. Noroviruses have a single-stranded, ... -
Exploring one-state downhill protein folding in single molecules
(National Academy of Sciences, 2012-01-3)A one-state downhill protein folding process is barrierless at all conditions, resulting in gradual melting of native structure that permits resolving folding mechanisms step-by-step at atomic resolution. Experimental ... -
Catalysis of protein folding by chaperones in pathogenic bacteria
(2004-12-14)Molecular chaperones are thought to inhibit off-pathway interactions such as aggregation from occurring without influencing the on-pathway formation of native structure. Here, we present a mechanism whereby the family of ... -
Altered acetylcholinesterase activity (AChE) and maze performance of developing rats (Rattus norvegicus) following mesencephalic electrical brain stimulation
(Springer-Verlag, 1977-11-17)Cortical arousal was altered by electrical brain stimulation (EBS) to the mesencephalic ascending reticular formation beginning at 27 days of age and administered 2 h/day for either 14 or 28 days. Subjects receiving brain ... -
Evolution of stability/flexibility relationships in beta-lactamase
(Cell Press, 2019-02-15)We have curated over 100 structures of class A beta-lactamase proteins, a family of enzymes that is responsible for a considerable percentage of multidrug antibiotic resistance in bacteria. Our dataset includes three ... -
Characterizing dynamical differences between TEM-1 and TEM-52 beta-lactamases
(Cell Press, 2019-02-15)Beta-lactamase, produced in bacteria, defends against beta-lactam antibiotics such as penicillin and cephalosporins by hydrolyzing the beta-lactam ring. This is a primary cause of antibiotic resistance to beta-lactam ... -
Antiviral drug discovery: norovirus proteases and development of inhibitors
(MDPI AG, Basel, Switzerland, 2019-02-25)Proteases are a major enzyme group playing important roles in a wide variety of biological processes in life forms ranging from viruses to mammalians. The aberrant activity of proteases can lead to various diseases; ... -
Elemental dependence of structurally specific isotopic shifts in high-field ion mobility spectra
(ACS, 2019-02-01)Nearly all molecules incorporate at least one element with stable isotopes, yielding ubiquitous isotopologic envelopes in mass spectra. Those envelopes split in differential or field asymmetric waveform ion mobility (FAIMS) ... -
Periplasmic peptidyl prolyl cis-trans isomerases are not essential for viability, but SurA is required for pilus biogenesis in Escherichia coli
(American Society for Microbiology, 2005-08-31)In Escherichia coli, FkpA, PpiA, PpiD, and SurA are the four known periplasmic cis-trans prolyl isomerases. These isomerases facilitate proper protein folding by increasing the rate of transition of proline residues between ... -
Synthesis and characterization of 2-(2-pyridinyl)pyrazine and 2,2′-bipyrazine derivatives
(Journal of Heterocyclic Chemistry, 2019-01-29)A convenient and high yield preparation of derivatives of 2-(2-pyridinyl)pyrazine and derivatives of 2,2′-bipyrazine compounds from their derivatives of bromopyrazine using Stille coupling is reported. X-ray structures, ... -
Recommendations for reporting ion mobility mass spectrometry measurements
(Wiley, 2019-03-07)Here we present a guide to ion mobility mass spectrometry experiments, which covers both linear and nonlinear methods: what is measured, how the measurements are done, and how to report the results, including the uncertainties ... -
Differential ion mobility separations/mass spectrometry with high resolution in both dimensions
(American Chemical Society, 2019-01-15)Strong orthogonality to mass spectrometry makes differential ion mobility spectrometry (FAIMS) a powerful tool for isomer separations. However, high FAIMS resolution has been achieved overall only with buffers rich in He ... -
How does solvation layer mobility affect protein structural dynamics?
(Frontiers Media S.A., 2018-07-13)Salvation is critical for protein structural dynamics. Spectroscopic studies have indicated relationships between protein and solvent dynamics, and rates of gas binding to heme proteins in aqueous solution were previously ... -
Polypyridyl complexes of uracil derivatives attached to 2,2 '-pyridyl
(American Chemical Society, 2018)Three ligands obtained by the condensation of 2,2'-pyridyl with 5,6-diaminouracil, 5,6-diamino-1-methyluracil and 5,6-diamino-1,3-dimethyluracil were synthesized and crystal structures of the uracil and di-Me ... -
Carbon nanomaterials for new generation solar cells
(American Chemical Society, 2018)Recently, we invented various types of 3D carbon nanomaterials via invented reactions. Those novel materials possess high elec. cond. and large accessible surface area, which are required for ideal electrode materials. ...
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